NATIONAL PATENT DEVELOPMENT CORP
SC 13D/A, 1996-11-22
EDUCATIONAL SERVICES
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D
                   Under the Securities Exchange Act of 1934
                               (Amendment No. 3)*

                          General Physics Corporation
- -------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
- -------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                  637130-10-5
                ------------------------------------------------
                                 (CUSIP Number)

           Andrea D. Kantor
           National Patent Development Corporation
           9 West 57th Street
           New York, NY 10019              Telephone No. (212) 230-9516
- -------------------------------------------------------------------------------
      (Name, Address and Telephone Number of Person Authorized to Receive
                          Notices and Communications)

- -------------------------------------------------------------------------------

                               November 19, 1996
                ------------------------------------------------
            (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box.  [ ]

Check the following box if a fee is being paid with the statement.  [ ]
(A fee is not required only if the reporting person: (1) has a previous
statement on file reporting beneficial ownership of more than five percent of
the class of securities described in Item 1; and has filed no amendment
subsequent thereto reporting beneficial ownership of less than five percent of
such class. See Rule 13d-7.

Note: Six copies of this statement, including all exhibits, should be filed
with the Commission. See Rule 13d-1(a) for other parties to whom copies are to
be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).

<PAGE>   2
                                  SCHEDULE 13D

CUSIP NO. 637130-10-5                                          PAGE 2 OF 5 PAGES

- --------------------------------------------------------------------------------

1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Five Star Group, Inc.
- --------------------------------------------------------------------------------
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
3   SEC USE ONLY


- --------------------------------------------------------------------------------
4   SOURCE OF FUNDS*

WC
- --------------------------------------------------------------------------------
5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
    TO ITEMS 2(D) OR 2(E)                                                    / /

- --------------------------------------------------------------------------------
6   CITIZENSHIP OR PLACE OF ORGANIZATION


Delaware
- --------------------------------------------------------------------------------
                7   SOLE VOTING POWER
  NUMBER OF
   SHARES           1,062,500
BENEFICIALLY   -----------------------------------------------------------------
  OWNED BY      8   SHARED VOTING POWER
   EACH            
 REPORTING          -0-
  PERSON       -----------------------------------------------------------------
   WITH         9   SOLE DISPOSITIVE POWER

                    1,062,500
               -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER
     
                    -0-
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,062,500
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
     CERTAIN SHARES*                                                         / /


- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

10.1% 
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

CO     
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>   3
                                  SCHEDULE 13D

CUSIP NO. 637130-10-5                                          PAGE 2 OF 5 PAGES

- --------------------------------------------------------------------------------

1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

MXL Industries, Inc.
- --------------------------------------------------------------------------------
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
3   SEC USE ONLY


- --------------------------------------------------------------------------------
4   SOURCE OF FUNDS*

WC
- --------------------------------------------------------------------------------
5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
    TO ITEMS 2(D) OR 2(E)                                                    / /

- --------------------------------------------------------------------------------
6   CITIZENSHIP OR PLACE OF ORGANIZATION


Delaware
- --------------------------------------------------------------------------------
                7   SOLE VOTING POWER
  NUMBER OF
   SHARES           637,500    
BENEFICIALLY   -----------------------------------------------------------------
  OWNED BY      8   SHARED VOTING POWER
   EACH            
 REPORTING          -0-     
  PERSON       -----------------------------------------------------------------
   WITH         9   SOLE DISPOSITIVE POWER

                    637,500     
               -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER
     
                    -0-
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

637,500     
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
     CERTAIN SHARES*                                                         / /

- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

6.0%     
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

CO     
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

<PAGE>   4
                                  SCHEDULE 13D

CUSIP NO. 637130-10-5                                          PAGE 2 OF 5 PAGES

- --------------------------------------------------------------------------------

1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Jerome I. Feldman
- --------------------------------------------------------------------------------
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
3   SEC USE ONLY


- --------------------------------------------------------------------------------
4   SOURCE OF FUNDS*

WC
- --------------------------------------------------------------------------------
5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
    TO ITEMS 2(D) OR 2(E)                                                    / /

- --------------------------------------------------------------------------------
6   CITIZENSHIP OR PLACE OF ORGANIZATION


United States
- --------------------------------------------------------------------------------
                7   SOLE VOTING POWER
  NUMBER OF
   SHARES           42,100 
BENEFICIALLY   -----------------------------------------------------------------
  OWNED BY      8   SHARED VOTING POWER
   EACH            
 REPORTING          6,904,234 
  PERSON       -----------------------------------------------------------------
   WITH         9   SOLE DISPOSITIVE POWER

                    42,100
               -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER
     
                    6,904,234
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

6,904,234     
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
     CERTAIN SHARES*                                                         / /

- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

57.8%
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

IN     
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* Includes warrants to acquire an aggregate of 1,357,355 shares of common
stock.
<PAGE>   5
                                  SCHEDULE 13D

CUSIP NO. 637130-10-5                                          PAGE 2 OF 5 PAGES

- --------------------------------------------------------------------------------

1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Martin M. Pollack
- --------------------------------------------------------------------------------
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
3   SEC USE ONLY


- --------------------------------------------------------------------------------
4   SOURCE OF FUNDS*

WC
- --------------------------------------------------------------------------------
5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
    TO ITEMS 2(D) OR 2(E)                                                    / /

- --------------------------------------------------------------------------------
6   CITIZENSHIP OR PLACE OF ORGANIZATION


United States
- --------------------------------------------------------------------------------
                7   SOLE VOTING POWER
  NUMBER OF
   SHARES           46,370
BENEFICIALLY   -----------------------------------------------------------------
  OWNED BY      8   SHARED VOTING POWER
   EACH            
 REPORTING          6,908,504
  PERSON       -----------------------------------------------------------------
   WITH         9   SOLE DISPOSITIVE POWER

                    46,370
               -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER
     
                    6,908,504
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

6,908,504     
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
     CERTAIN SHARES*                                                         / /

- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

57.8%     
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

IN     
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* Includes warrants to acquire an aggregate of 1,357,355 shares of Common
Stock.
* Includes warrants to acquire an aggregate of 470 shares of Common Stock.
<PAGE>   6
                                  SCHEDULE 13D

CUSIP NO. 637130-10-5                                          PAGE 2 OF 5 PAGES

- --------------------------------------------------------------------------------

1   NAME OF REPORTING PERSON
    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

National Patent Development Corporation
- --------------------------------------------------------------------------------
2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                         (a) / /
                                                                         (b) / /
- --------------------------------------------------------------------------------
3   SEC USE ONLY


- --------------------------------------------------------------------------------
4   SOURCE OF FUNDS*

WC
- --------------------------------------------------------------------------------
5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT 
    TO ITEMS 2(D) OR 2(E)                                                    / /

- --------------------------------------------------------------------------------
6   CITIZENSHIP OR PLACE OF ORGANIZATION


Delaware
- --------------------------------------------------------------------------------
                7   SOLE VOTING POWER
  NUMBER OF
   SHARES           5,162,134
BENEFICIALLY   -----------------------------------------------------------------
  OWNED BY      8   SHARED VOTING POWER
   EACH            
 REPORTING          6,862,134
  PERSON       -----------------------------------------------------------------
   WITH         9   SOLE DISPOSITIVE POWER

                    5,162,134
               -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER
                    
                    6,862,134
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

6,862,134     
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES 
     CERTAIN SHARES*                                                         / /

- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     57.6%
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*

CO     
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

* Includes warrants to acquire an aggregate of 1,357,355 shares of Common
Stock.
<PAGE>   7
Item 1. Security and Issuer

        This Statement relates to the common stock, par value $.025 per share
(the "Common Stock"), of General Physics Corporation, a Delaware corporation
with principal executive offices located at Suite 400, 6700 Alexander Bell
Drive, Columbia, MD 21046 (the "Company"). This Statement constitutes Amendment
No. 3 ("Amendment No. 3") to a Schedule 13D, dated March 31, 1987 (the
"Schedule 13D"), of National Patent Development Corporation ("NPDC") with
respect to the Common Stock of the Company. Except as amended hereby and the
other amendments thereto, the statements in the Schedule 13D remain unchanged.

Item 4. Purpose of Transaction

        Item 4 of the Schedule 13D is hereby amended to add the following
information: 

        On November 19, 1996, NPDC and the Company entered into a Merger
Agreement pursuant to which NPDC would acquire the remaining shares (48% of the
outstanding shares) of the Company's Common Stock that NPDC did not already own
for $5.10 per share, subject to adjustment as described below, payable in NPDC
common stock. The Merger Agreement was recommended to the Board of Directors of
the Company by a Special Committee of the Board composed of independent
directors. The Special Committee of the Company's Board of Directors retained
Oppenheimer & Co., Inc. as its financial advisor in connection with the Merger.
The consummation of the Merger Agreement is subject to several conditions,
including the approval of the stockholders of both companies.

        If the market price of NPDC's common stock for the ten trading days
immediately preceding the date five days prior to the special meetings of
stockholders of NPDC and the Company to consider approval of the merger (the
"Test Date") is neither less than $9.336 nor more than $9.914 per share, the
exchange ratio will be .53 shares of NPDC for each share of the Company, and
neither the Company nor NPDC will have the right to terminate the Merger
Agreement based on changes in the market price of NPDC's common stock. If the
market price of NPDC's common stock is within the range of $9.336 to $9.914 per
share, the .53 exchange ratio will provide holders of the Company's Common Stock
with shares of NPDC Common Stock with a value in the range between $4.95 and
$5.25 per share of the Company's Common Stock.

        In the event that the market price of NPDC's common stock on the Test
Date is outside the range of $9.336 to $9.914, the exchange ratio may be
adjusted. If the market price on the Test Date is less than $9.336, NPDC may
elect to "gross-up" the exchange ratio by increasing the number of
shares of NPDC's common stock to be received by a holder of the Company's
Common Stock so that such holder will receive shares of NPDC Common Stock with
a value per share of the Company's Common Stock equal to $4.95. If NPDC fails
to exercise this option, the Company may (but is not obligated to) terminate
the Merger Agreement. If the market price on the Test Date is greater than
$9.914, then the Company may elect to reduce the exchange ratio by decreasing
the number of shares of NPDC's Common Stock to be received by a holder of the
Company's Common Stock so that such holder will receive shares of NPDC's Common
Stock with a value per share of the Company's Common Stock equal to $5.25 per
share. If the Company fails to exercise this option, NPDC may (but is not
obligated to) terminate the Merger Agreement.
<PAGE>   8
        On November 20, 1996, the closing price of NPDC's Common Stock on the
American Stock Exchange was $8.50 per share. NPDC has not determined whether it
would "gross-up" the exchange ratio or elect not to do so if the market price
of NPDC's Common Stock on the effective date of the Merger is less than $9.336
per share.

        Oppenheimer has rendered an opinion to the Special Committee to the 
effect that, based upon various considerations and assumptions, the right to 
receive shares of NPDC Common Stock having a value of at least $4.95 per share
of the Company's Common Stock is fair to the holders of the Company's Common 
Stock (other than NPDC) from a financial point of view.

        NPDC has agreed in the Merger Agreement to use its reasonable best
efforts to repurchase, prior to the Effective Time of the Merger (the
"Effective Time"), all stock options held by each employee, officer and
director of the Company which will vest by their terms prior to or at the
Effective Time.  Holders of vested stock options will be entitled to receive
cash in an amount equal to $5.10 per share less the exercise price of the stock
option as in effect immediately prior to the repurchse.  Each employee, officer
and director of the Company holding stock options which are unvested as of the
Effective Time will be entitled to receive for each share of the Company's
Common Stock which would have been obtainable upon exercise of the stock option
a payment from NPDC in shares of NPDC Common Stock equal to $5.10 less the
exercise price of the unvested stock option as such exercise price is in effect
immediately prior to the Merger (subject to adjustment for stock dividends,
stock splits and similar transactions).  Such payment in shares of NPDC Common
Stock will be made at the time such stock option vests using the market price
of the NPDC Common Stock as of the end of the business day immediately
preceding such vesting date.  The $5.10 price represents the middle of the
range of prices of the Company's Common Stock, from $4.95 to $5.25, which will
be paid in shares of NPDC Common Stock in the Merger, so long as the market 
price of the NPDC Common Stock is within the Collar.  The $5.10 price remains 
fixed even if on the Test Date the market price of the NPDC Common Stock is 
outside of the Collar.  To the extent that any vested stock options are not 
repurchased by NPDC, such vested stock options will be adjusted so that the 
holders of such options will be entitled to receive, upon payment of the
exercise price thereof, the shares of NPDC Common Stock which such holders
would have been entitled to receive after the Effective Time had such options
been exercised immediately prior to the Merger.

        At the Effective Time, all outstanding warrants to purchase shares of
the Company's Common Stock will be adjusted so that the holders of the warrants
will be entitled to receive, upon payment of the exercise price thereof, the
shares of NPDC Common Stock which such holders would have owned or have been
entitled to receive after the Effective Time had such warrants been exercised
immediately prior to the Effective Time.  NPDC and its subsidiaries own
warrants to purchase 1,357,355 shares of the Company's Common Stock.  NPDC has
agreed in the Merger Agreement to contribute all or any portion of such
warrants to the capital of the Company, such warrants to be thereupon canceled. 
NPDC will, as of the Effective Time, assume jointly with the Company the
obligation to issue shares of NPDC Common Stock to holders of the remaining
warrants upon exercise thereof pursuant to the terms thereof.

        NPDC has agreed prior to the Effective Time to cause its subsidiaries
which hold shares of the Company's Common Stock (other than the Company) to
dividend such shares to NPDC.

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect
to Securities of the Issuer.

        Item 6 of the Schedule 13D is hereby amended to add the following
information:

        On November 19, 1996, NPDC and the Company entered into a Merger
Agreement.  The Merger Agreement is described above in this Statement under
Item 4.

Item 7. Material to be Filed as Exhibits

        Item 7 of the Schedule 13D is hereby amended to add the following 
information:

        (a)     Agreement and Plan of Merger dated as of November 19, 1996
among General Physics Corporation, National Patent Development Corporation and
GPX Acquisition Inc.

        (b)     Press Release dated November 21, 1996.

        
<PAGE>   9
                                   SIGNATURE

After reasonable inquiry and to the best of the knowledge and belief of the
undersigned, the undersigned certifies that the information set forth in this
statement is true, complete and correct.

November 21, 1996                       NATIONAL PATENT DEVELOPMENT CORPORATION
                                        
                                        By: /s/  Scott N. Greenberg
                                            ----------------------------------
                                            Scott N. Greenberg
                                            Vice President and Chief Financial
                                            Officer        
    
<PAGE>   10
                                 EXHIBIT INDEX

        EXHIBIT NO.             DESCRIPTION OF EXHIBIT
        -----------             ----------------------
            (1)                 Agreement and Plan of Merger dated as of 
                                November 19, 1996 among General Physics 
                                Corporation, National Patent Development
                                Corporation and GPX Acquisition, Inc.

            (2)                 Press Release dated November 21, 1996

<PAGE>   1
 Contact:  Jerome I. Feldman                            John C. McAuliffe
           National Patent Development                  General Physics
           Corporation                                  Corporation
           Chief Executive Officer &                    Chief Operating Officer
           President                                    (410) 290-2708
           (212) 230-9508

         NATIONAL PATENT AND GENERAL PHYSICS ANNOUNCE MERGER AGREEMENT
                      FOR NATIONAL PATENT TO ACQUIRE 100%
                               OF GENERAL PHYSICS

FOR IMMEDIATE RELEASE
- ---------------------

        New York, New York, November 21, 1996 . . . National Patent Development
Corporation (ASE:NPD) and General Physics Corporation (NYSE:GPH) announced
today that they had entered into a Merger Agreement pursuant to which National
Patent would acquire the remaining shares (48% of the outstanding shares) of
General Physics' Common Stock that it does not already own for $5.10 per share,
subject to adjustment as described below, payable in National Patent Common
Stock. The Merger Agreement was recommended to the Board of Directors of
General Physics by a Special Committee of the Board composed of independent
directors. The Special Committee of General Physics' Board of Directors has
retained Oppenheimer & Co., Inc. as its financial advisor in connection with
the Merger. The consummation of the Merger Agreement is subject to several
conditions, including the approval of the stockholders of both companies.

        If the market price of National Patent's Common Stock for the ten
trading days immediately preceding the date five days prior to the special
meetings of stockholders of National Patent and General Physics to consider
approval of the merger (the "Test Date") is neither less than $9.336 nor more
than $9.914 per share, the exchange ratio will be .53 shares of National Patent
for each share of General Physics, and neither General Physics nor National
Patent will have the right to terminate the Merger Agreement based on changes
in the market price of National Patent's Common Stock. If the market price of
National Patent's Common Stock is within the range of $9.336 to $9.914 per
share, the .53 exchange ratio will provide holders of General Physics' Common
Stock with shares of National Patent Common Stock with a value in the range
between $4.95 and $5.25 per share of General Physics Common Stock.

                                     (over)
<PAGE>   2
        In the event that the market price of National Patent's Common Stock on
the Test Date is outside the range of $9.336 to $9.914, the exchange ratio may
be adjusted. If the market price on the Test Date is less than $9.336, National
Patent may elect to "gross-up" the exchange ratio by increasing the number of
shares of National Patent's Common Stock to be received by a holder of General
Physics' Common Stock so that such holder will receive shares of National
Patent Common Stock with a value per share of General Physics' Common Stock
equal to $4.95. If National Patent fails to exercise this option, General
Physics may (but is not obligated to) terminate the Merger Agreement. If the
market price on the Test Date is greater than $9.914, then General Physics may
elect to reduce the exchange ratio by decreasing the number of shares of
National Patent's Common Stock to be received by a holder of General Physics'
Common Stock so that such holder will receive shares of National Patent's
Common Stock with a value per share of General Physics Common Stock equal to
$5.25 per share. If General Physics fails to exercise this option, National
Patent may (but is not obligated to) terminate the Merger Agreement.

        On November 20, 1996, the closing price of National Patent's Common
Stock on the American Stock Exchange was $8.50 per share. National Patent has
not determined whether it would "gross-up" the exchange ratio of elect not to
do so if the market price of National Patent's Common Stock on the effective
date of the Merger is less than $9.336 per share.

        Oppenheimer has rendered an opinion to the Special Committee to the
effect that based upon various considerations and assumptions, the right to
receive shares of National Patent Common Stock having a value of at least $4.95
per share of General Physics Common Stock is fair to the holders of General
Physics Common Stock (other than National Patent) from a financial point of 
view.

        National Patent is a publicly traded company with established core
operating businesses, investments and emerging technologies.

        General Physics Corporation is a publicly traded company which provides
engineering, environmental, training, analytical, and technical support
services to commercial nuclear and fossil power utilities, US Departments of
Defense and Energy, Fortune 500 companies, and other commercial and
governmental customers.

        The offering by National Patent of National Patent Common Stock in the
Merger will be made only by means of a prospectus.


<PAGE>   1
                          AGREEMENT AND PLAN OF MERGER

                          DATED AS OF NOVEMBER 19, 1996

                                      AMONG

                          GENERAL PHYSICS CORPORATION,

                     NATIONAL PATENT DEVELOPMENT CORPORATION

                                       AND

                              GPX ACQUISITION INC.
<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                        Page
<S>                                                                                                     <C>
ARTICLE 1

         THE MERGER...................................................................................  1
         Section 1.1.               The Merger........................................................  1
         Section 1.2.               Closing...........................................................  1
         Section 1.3.               Effective Time....................................................  2
         Section 1.4.               Effects of the Merger.............................................  2
         Section 1.5.               Certificate of Incorporation; By-laws.............................  2
         Section 1.6.               Directors and Officers of the Surviving Corporation...............  2

ARTICLE 2

         EFFECT OF THE MERGER ON THE SECURITIES
         OF THE CONSTITUENT CORPORATIONS..............................................................  3
         Section 2.1.               Effect on Capital Stock...........................................  3
         Section 2.2.               Exchange of Certificates..........................................  5

ARTICLE 3

         REPRESENTATIONS AND WARRANTIES...............................................................  8
         Section 3.1.               Representations and Warranties of General Physics.................  8
         Section 3.2.               Representations and Warranties of the Parent and Newco............ 17

ARTICLE 4

         COVENANTS RELATING TO CONDUCT OF BUSINESS
         PRIOR TO MERGER.............................................................................. 25
         Section 4.1.               Certain Covenants................................................. 25

ARTICLE 5

         ADDITIONAL AGREEMENTS........................................................................ 29
         Section 5.1.               Preparation of Form S-4, the GPC Proxy Statement and the NPD Proxy
                                    Statement......................................................... 29
         Section 5.2.               Meetings of Stockholders.......................................... 30
         Section 5.3.               Legal Requirements to Merger...................................... 31
         Section 5.4.               Access to Information............................................. 31
         Section 5.5.               Best Efforts...................................................... 31
         Section 5.6.               Capital Stock             ........................................ 31
         Section 5.7.               Indemnification and Insurance..................................... 32
         Section 5.8.               Public Announcements.............................................. 33
</TABLE>




                                       i
<PAGE>   3
<TABLE>
<S>                                                                                                    <C>
         Section 5.9.               No Solicitation, Etc.............................................. 33
         Section 5.10.              Consents, Approvals and Filings................................... 34
         Section 5.11.              Non-Interference, Etc............................................. 34
         Section 5.12.              Affiliates........................................................ 35
         Section 5.13.              Listing........................................................... 35
         Section 5.14.              Brokers and Finders............................................... 35

ARTICLE 6

         CONDITIONS PRECEDENT......................................................................... 36
         Section 6.1.               Conditions to Each Party's Obligation to Effect the Merger........ 36
         Section 6.2.               Conditions to Obligations of General Physics...................... 37
         Section 6.3.               Conditions to Obligations of the Parent and Newco................. 38

ARTICLE 7

         TERMINATION, AMENDMENT AND WAIVER............................................................ 39
         Section 7.1.               Termination....................................................... 39
         Section 7.2.               Fees and Expenses Upon Termination................................ 41
         Section 7.3.               Effect of Termination............................................. 41
         Section 7.4.               Extension; Waiver................................................. 42
         Section 7.5.               Procedure for Termination, Amendment, Extension or Waiver; Role of
                                    the Special Committee up to the Effective Time.................... 42

ARTICLE 8

         DEFINITIONS.................................................................................. 42
         Section 8.1.               Certain Defined Terms............................................. 42
         Section 8.2.               Certain Rules of Construction..................................... 44
         Section 8.3.               Table of Defined Terms Defined in the Text of the Agreement....... 45

ARTICLE 9

         GENERAL PROVISIONS........................................................................... 46
         Section 9.1.               Nonsurvival of Representations and Warranties..................... 46
         Section 9.2.               Fees and Expenses................................................. 47
         Section 9.3.               Notices........................................................... 47
         Section 9.4.               Amendment......................................................... 48
         Section 9.5.               Entire Agreement; Third-Party Beneficiaries....................... 48
         Section 9.6.               Governing Law..................................................... 48
         Section 9.7.               Assignment........................................................ 48
         Section 9.8.               Enforcement....................................................... 48
         Section 9.9.               Severability...................................................... 49
         Section 9.10.              Counterparts...................................................... 49
</TABLE>




                                       ii
<PAGE>   4

                          AGREEMENT AND PLAN OF MERGER

         AGREEMENT AND PLAN OF MERGER dated as of November 19, 1996 among
General Physics Corporation, a Delaware corporation ("General Physics"),
National Patent Development Corporation, a Delaware corporation ("Parent"), and
GPX Acquisition Inc., a Delaware corporation ("Newco"). Capitalized terms are
used as defined in Article 8 hereof.

                              W I T N E S S E T H :

         WHEREAS, the Board of Directors of General Physics, based upon the
unanimous recommendation of the special committee of the independent directors
of General Physics (the "Special Committee"), and the Boards of Directors of the
Parent and of Newco deem it advisable and in the best interests of their
respective stockholders to consummate, and have unanimously approved, the merger
of Newco with and into General Physics upon the terms and subject to the
conditions set forth herein (the "Merger");

         WHEREAS, the parties hereto desire to make certain representations,
warranties, covenants and agreements in connection with the Merger and also to
prescribe various conditions to the Merger;

         NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements contained in this
Agreement, the parties hereto agree as follows:

                                    ARTICLE 1

                                   THE MERGER

         SECTION 1.1. THE MERGER. Upon the terms and subject to the conditions
set forth in this Agreement, and in accordance with the Delaware General
Corporation Law (the "DGCL"), Newco shall be merged with and into General
Physics at the Effective Time. Upon the Effective Time, the separate existence
of Newco shall cease, and General Physics shall continue as the surviving
corporation (the "Surviving Corporation").

         SECTION 1.2. CLOSING. Unless this Agreement shall have been terminated
pursuant to Section 7.1 and subject to the satisfaction or waiver of each of the
conditions set forth in Article 6, the closing of the Merger (the "Closing")
will take place at 10:00 a.m. on the date (the "Closing Date") that is the
second business day following the date on which the last to be fulfilled or
waived of the conditions set forth in Article 6 shall be fulfilled or waived in
accordance with this Agreement, at the offices of Morgan, Lewis & Bockius LLP,
101 Park Avenue, New York, New York 10178, unless another date, time or place is
agreed to in writing by the parties hereto.
<PAGE>   5
                                                    Agreement and Plan of Merger

         SECTION 1.3. EFFECTIVE TIME. The parties hereto will file with the
Secretary of State of the State of Delaware (the "Delaware Secretary of State")
on the date of the Closing (or on such other later date as General Physics and
the Parent may agree) a certificate of merger or other appropriate documents,
prepared and executed in accordance with the relevant provisions of the DGCL,
and make all other filings and recordings required under the DGCL in connection
with the Merger. The Merger shall become effective upon the filing of the
certificate of merger with the Delaware Secretary of State, or at such later
time as is specified in the certificate of merger (the "Effective Time").

         SECTION 1.4. EFFECTS OF THE MERGER. The Merger shall have the effects
set forth in Section 259 of the DGCL. Without limiting the generality of the
foregoing, and subject thereto, at the Effective Time, the capital stock of
Newco shall become the capital stock of the Surviving Corporation and all the
properties, rights, privileges, powers and franchises of Newco shall vest in the
Surviving Corporation, and all debts, liabilities and duties of Newco shall
become the debts, liabilities and duties of the Surviving Corporation, all as
provided under the DGCL.

         SECTION 1.5. CERTIFICATE OF INCORPORATION; BY-LAWS.

                  (a) The Certificate of Incorporation of General Physics (the
"GPC Charter"), as in effect immediately prior to the Effective Time, shall from
and after the Effective Time, be the certificate of incorporation of the
Surviving Corporation until thereafter changed or amended as provided therein or
by applicable law.

                  (b) The by-laws of General Physics (the "GPC By-laws") as in
effect immediately prior to the Effective Time shall be the by-laws of the
Surviving Corporation until thereafter changed or amended as provided therein or
by applicable law.

         SECTION 1.6. DIRECTORS AND OFFICERS OF THE SURVIVING CORPORATION.

                  (a) The directors of General Physics immediately prior to the
Effective Time shall be the directors of the Surviving Corporation until their
respective successors are duly elected and qualified or until their earlier
death, resignation or removal in accordance with the GPC Charter and the GPC
By-laws, or as otherwise provided by applicable law.

                  (b) The officers of General Physics immediately prior to the
Effective Time shall be the officers of the Surviving Corporation until their
respective successors are duly appointed and qualified or until their earlier
death, resignation or removal in accordance with the GPC Charter and the GPC
By-laws, or as otherwise provided by applicable law.

 

                                        2
<PAGE>   6
                                                    Agreement and Plan of Merger

                                    ARTICLE 2

                     EFFECT OF THE MERGER ON THE SECURITIES
                         OF THE CONSTITUENT CORPORATIONS

         SECTION 2.1. EFFECT ON CAPITAL STOCK. As of the Effective Time, by
virtue of the Merger and without any action on the part of the holders of any
shares of General Physics' Common Stock, par value $.025 per share (the "GPC
Common Stock"), or any other shares of capital stock of General Physics:

                  (a) Cancellation of GPC Treasury Stock and Certain NPD-Owned
Stock. Each share of GPC Common Stock issued and outstanding immediately prior
to the Effective Time that is owned by General Physics or any Subsidiary of
General Physics or by the Parent shall automatically be canceled and retired and
shall cease to exist, and no shares of the Parent's Common Stock, par value $.01
per share (the "NPD Common Stock"), cash or other consideration shall be
delivered or deliverable in exchange therefor.

                  (b) Conversion of GPC Common Stock. Subject to Section 2.2(f),
each share of GPC Common Stock issued and outstanding immediately prior to the
Effective Time (other than shares to be canceled in accordance with Section 
2.1(a) above) shall, as a matter of law, be converted into the right to receive
from the Parent a fraction of a validly issued, fully paid and non-assessable
share of NPD Common Stock equal to the Exchange Ratio (the "Stock
Consideration"). (The Stock Consideration and any cash to be paid in accordance
with Section 2.2(f) in lieu of fractional shares of NPD Common Stock are
referred to collectively as the "Merger Consideration".) The term "Exchange
Ratio" means a ratio equal to 0.53, except (A) in the event that the Parent
Stock Price is less than $9.336, the Parent may elect at its option (without any
obligation to do so) to increase the Exchange Ratio to the Adjusted Exchange
Ratio pursuant to the following formula:

                  (9.336 divided by the Parent Stock Price) x 0.53 = Adjusted 
Exchange Ratio

(rounded to the nearest 1/100), provided that the Parent provides notice of its
election of such option (the "Parent Gross-Up Option") to General Physics no
later than the close of business on the second trading day after the Test Date
(such notice to specify the Adjusted Exchange Ratio) and (B) in the event that
the Parent Stock Price is greater than $9.914, General Physics may elect at its
option (without any obligation to do so) to decrease the Exchange Ratio to the
Adjusted Exchange Ratio pursuant to the following formula:

                  (9.914 divided by the Parent Stock Price) x 0.53 = Adjusted 
Exchange Ratio

 

                                        3
<PAGE>   7
                                                    Agreement and Plan of Merger

(rounded to the nearest 1/100), provided that General Physics provides notice of
its election of such option (the "GPC Reduction Option") to the Parent no later
than the close of business on the second trading day after the Test Date (such
notice to specify the Adjusted Exchange Ratio).

                  (c)      General Physics Stock Options.

                           (i) As of the Effective Time, the holder of each
         outstanding stock option to purchase GPC Common Stock granted under the
         1991 General Physics Corporation Stock Option Plan (such options, the
         "Options") which is then unvested shall be entitled to receive (upon
         vesting) for each share of GPC Common Stock which would have been
         obtainable upon exercise of the Option a payment from the Parent in
         shares of NPD Common Stock equal to $5.10 less the exercise price of
         the unvested Option as such exercise price is in effect immediately
         prior to the Merger, subject to adjustment for stock dividends, stock
         splits and the like. Such payment in shares of NPD Common Stock shall
         be made to the holder of the Option at the time such Option vests using
         the market price of NPD Common Stock as of the end of the business day
         immediately preceding such vesting date. Each such Option shall be
         cancelled upon payment therefor.

                           (ii) As of the Effective Time, all Options which have
         vested prior to, or which will vest upon, the Effective Time (the
         "Vested Options") which have not been repurchased by the Parent
         pursuant to Section 5.6 because the holder(s) of such Vested Options
         have not consented to such repurchase (the "Assumed Options") shall be
         adjusted such that the holder of each of the Assumed Options shall be
         entitled to receive, upon payment of the exercise price thereof (as in
         effect immediately prior to the Effective Time, as may be adjusted
         thereafter for any stock splits, combinations, reclassifications and
         the like), the shares of NPD Common Stock which such holder would have
         been entitled to receive after the Effective Time had such Assumed
         Option been exercised immediately prior to the Effective Time. The form
         of Assumed Option shall be adjusted in a form as may be approved by the
         Board of Directors of General Physics and by the Board of Directors of
         National Patent to reflect adjustments in the exercise price thereof
         and the number and kind of securities purchased under such Assumed
         Options.

                  (d) Warrants. At the Effective Time, the Warrants shall be
adjusted such that the holder of each of the Warrants shall be entitled to
receive, upon payment of the exercise price thereof, the shares of NPD Common
Stock which such holder would have owned or have been entitled to receive after
the Effective Time had such Warrant been exercised immediately prior to the
Effective Time, as such exercise price and number of shares shall be thereafter
adjusted. The form of Warrant shall be adjusted in a form as may be approved by
the Board of Directors of General Physics to reflect adjustments in the exercise
price thereof and the number and kind of securities purchased under such
Warrants.

 

                                        4
<PAGE>   8
                                                    Agreement and Plan of Merger

                  (e) Cancellation and Retirement of GPC Common Stock. As of the
Effective Time, all certificates representing shares of GPC Common Stock, other
than certificates representing shares to be canceled in accordance with Section 
2.1(a), issued and outstanding immediately prior to the Effective Time, shall no
longer be outstanding and shall automatically be canceled and retired and shall
cease to exist, and each holder of a certificate representing any such shares of
GPC Common Stock shall cease to have any rights with respect thereto, except the
right to receive the Merger Consideration upon surrender of such certificate in
accordance with Section 2.2, without interest.

         SECTION 2.2. EXCHANGE OF CERTIFICATES.

                  (a) Exchange Agent. As of the Effective Time, the Parent shall
deposit with First City Transfer Company, or another bank or trust company
designated by the Parent and reasonably satisfactory to General Physics (the
"Exchange Agent"), for the benefit of the holders of shares of GPC Common Stock,
certificates representing shares of NPD Common Stock representing the aggregate
Stock Consideration (such certificates, together with any dividends or
distributions with respect to such certificates, being hereinafter referred to
as the "Exchange Fund").

                  (b)      Exchange Procedures.

                           (i) As soon as practicable after the Effective Time,
         each holder of an outstanding certificate or certificates which prior
         thereto represented shares of GPC Common Stock (except holders of
         shares of GPC Common Stock to be canceled in accordance with Section 
         2.1(a)) shall, upon surrender to the Exchange Agent of such certificate
         or certificates and acceptance thereof by the Exchange Agent, be
         entitled to a certificate representing that number of whole shares of
         NPD Common Stock (and cash in lieu of fractional shares of NPD Common
         Stock as contemplated by Section 2.2(f)) which the aggregate number of
         shares of GPC Common Stock previously represented by such certificate
         or certificates surrendered shall have been converted into the right to
         receive pursuant to Section 2.1(b).

                           (ii) The Exchange Agent shall accept such
         certificates upon compliance with such reasonable terms and conditions
         as the Exchange Agent may impose to effect an orderly exchange thereof
         in accordance with normal exchange practices. If the Merger
         Consideration (or any portion thereof) is to be delivered to any person
         other than the person in whose name the certificate representing shares
         of GPC Common Stock surrendered in exchange therefor is registered, it
         shall be a condition to such exchange that the certificate so
         surrendered shall be properly endorsed or otherwise be in proper form
         for transfer and that the person requesting such exchange shall pay to
         the Exchange Agent any transfer or other taxes required by reason of
         the payment of such consideration to a

 

                                        5
<PAGE>   9
                                                    Agreement and Plan of Merger

         person other than the registered holder of the certificate surrendered,
         or shall establish to the satisfaction of the Exchange Agent that such
         tax has been paid or is not applicable.

                           (iii) After the Effective Time, there shall be no
         further transfer on the records of General Physics or its transfer
         agent of certificates representing shares of GPC Common Stock and if
         such certificates are presented to General Physics for transfer, they
         shall be canceled against delivery of the Merger Consideration as
         hereinabove provided. Until surrendered as contemplated by this Section
         2.2(b), each certificate representing shares of GPC Common Stock (other
         than certificates representing shares of GPC Common Stock to be
         canceled in accordance with Section 2.1(a)) shall be deemed at any time
         after the Effective Time to represent only the right to receive upon
         such surrender the Merger Consideration, without any interest thereon,
         as contemplated by Section 2.1. No interest will be paid or will accrue
         on any cash payable as Merger Consideration.

                  (c) Letter of Transmittal. Promptly after the Effective Time
(but in no event more than five days thereafter), the Surviving Corporation
shall require the Exchange Agent to mail to each record holder of certificates
that immediately prior to the Effective Time represented shares of GPC Common
Stock which have been converted pursuant to Section 2.1, a form of letter of
transmittal and instructions for use in surrendering such certificates and
receiving the Merger Consideration to which such holder shall be entitled
pursuant to Section 2.1.

                  (d) Distributions with Respect to Unexchanged Shares. No
dividends or other distributions with respect to NPD Common Stock with a record
date after the Effective Time shall be paid to the holder of any certificate
that immediately prior to the Effective Time represented shares of GPC Common
Stock which have been converted pursuant to Section 2.1 ("Converted Shares"),
until the surrender for exchange of such certificate in accordance with this
Article 2. Following surrender for exchange of any such certificate, there shall
be paid to the holder of such certificate, without interest, (i) at the time of
such surrender, the amount of dividends or other distributions with a record
date after the Effective Time theretofore paid or payable with respect to the
number of whole shares of NPD Common Stock into which the shares of GPC Common
Stock represented by such certificate immediately prior to the Effective Time
were converted pursuant to Section 2.1 and (ii) at the appropriate payment date,
the amount of dividends or other distributions with a record date after the
Effective Time, but prior to such surrender, and with a payment date subsequent
to such surrender, payable with respect to such whole shares of NPD Common
Stock.

                  (e) No Further Ownership Rights in General Physics. The Merger
Consideration paid upon the surrender for exchange of certificates representing
shares of GPC Common Stock in accordance with the terms of this Article 2 shall
be deemed to have been issued and paid in full satisfaction of all rights
pertaining to the shares of GPC Common Stock theretofore represented by such
certificates, subject, however, to the Surviving Corporation's

 

                                        6
<PAGE>   10
                                                    Agreement and Plan of Merger

obligations (if any) (which shall be satisfied exclusively from the assets of
the Surviving Corporation, and not, directly or indirectly, from the assets of
the Parent) to pay any dividends or make any other distributions with a record
date prior to the Effective Time which may have been declared by General Physics
on such shares of GPC Common Stock in accordance with the terms of this
Agreement or prior to the date of this Agreement and which remain unpaid at the
Effective Time.

                  (f)      No Fractional Shares.

                           (i) No certificates or scrip representing fractional
         shares of NPD Common Stock shall be issued upon the surrender for
         exchange of certificates that immediately prior to the Effective Time
         represented shares of GPC Common Stock which have been converted
         pursuant to Section 2.1, and such fractional share interests will not
         entitle the owner thereof to vote or to any rights as a stockholder of
         the Parent.

                           (ii) Notwithstanding any other provisions of this
         Agreement, each holder of shares of GPC Common Stock who would
         otherwise have been entitled to receive a fraction of a share of NPD
         Common Stock (after taking into account all certificates delivered by
         such holder) pursuant to Section 2.1 shall receive, in lieu thereof,
         cash (without interest) in an amount equal to (x) such fractional part
         of a share of NPD Common Stock multiplied by (y) the Parent Stock
         Price. The Parent shall provide the Exchange Agent with the necessary
         cash for such payments as and when it is needed. No General Physics
         stockholder shall be entitled to receive cash in lieu of fractional
         shares in an amount greater than the value of one full share of GPC
         Common Stock.

                  (g) Termination of Exchange Fund. Any portion of the Exchange
Fund which remains undistributed to the holders of the certificates representing
Converted Shares for 180 days after the Effective Time shall be delivered to the
Parent, upon demand, and any holders of Converted Shares who have not
theretofore complied with this Article 2 shall thereafter look only to the
Parent for payment of their claim for any Merger Consideration and any dividends
or distributions with respect to NPD Common Stock.

                  (h) No Liability. None of General Physics, the Parent, the
Surviving Corporation or the Exchange Agent shall be liable to any person in
respect of any shares, cash, dividends or distributions payable from the
Exchange Fund delivered to a public official pursuant to any applicable
abandoned property, escheat or similar law. If any certificates representing
Converted Shares shall not have been surrendered prior to five years after the
Effective Time (or immediately prior to such earlier date on which any Merger
Consideration in respect of such certificate would otherwise escheat to or
become the property of any Governmental Entity), any such shares, cash,
dividends or distributions payable in respect of such certificate shall, to the

 

                                        7
<PAGE>   11
                                                    Agreement and Plan of Merger

extent permitted by applicable law, become the property of the Surviving
Corporation, free and clear of all claims or interest of any person previously
entitled thereto.

                  (i) Lost, Stolen or Destroyed Certificates. In the event that
any certificate for GPC Common Stock shall have been lost, stolen or destroyed,
the Exchange Agent shall issue in exchange therefor, upon the making of an
affidavit of that fact by the holder thereof, such shares of NPD Common Stock
and cash in lieu of fractional shares, if any, as may be required pursuant to
this Agreement; provided, however, that the Parent may, in its discretion,
require the delivery of a suitable bond or indemnity.

                                    ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES

         SECTION 3.1. REPRESENTATIONS AND WARRANTIES OF GENERAL PHYSICS. General
Physics represents and warrants to each of the Parent and Newco as follows:

                  (a) Organization, Standing and Power. Each of General Physics
and its Subsidiaries is a corporation, duly organized, validly existing and in
good standing under the laws of its jurisdiction of organization, has all
requisite power and authority to own, lease and operate its properties and to
carry on its business, as now being conducted, and is duly qualified and in good
standing to do business in each jurisdiction in which the nature of its business
or the ownership or leasing of its properties makes such qualification necessary
except when the failure to be so qualified would not have a GPC Material Adverse
Effect.

                  (b) Capital Structure.

                           (i) As of the date hereof, the authorized capital
         stock of General Physics consists of 20,000,000 shares of GPC Common
         Stock and 5,000,000 shares of Preferred Stock, par value $.025 per
         share (the "GPC Preferred Stock"). At the close of business on
         September 30, 1996:

                                    (A) 10,525,926 shares of GPC Common Stock
                           were outstanding, 2,000,000 shares of GPC Common
                           Stock were reserved for issuance upon the exercise of
                           outstanding stock options or pursuant to General
                           Physics' other benefit plans (such stock options and
                           such benefit plans, collectively, the "GPC Stock
                           Plans");

 

                                        8
<PAGE>   12
                                                    Agreement and Plan of Merger

                                    (B) no shares of GPC Common Stock were held
                           by its subsidiaries;

                                    (C) except for the Warrants and the Options,
                           no bonds, debentures, notes or other indebtedness
                           having the right to vote (or convertible into or
                           exercisable for securities having the right to vote)
                           on any matters on which stockholders may vote
                           ("Voting Debt"), and no other options or warrants to
                           purchase shares of GPC Common Stock were issued or
                           outstanding; and

                                    (D) no shares of GPC Preferred Stock were
                           issued and outstanding.

         All outstanding shares of General Physics capital stock are validly
         issued, fully paid and nonassessable and not subject to preemptive
         rights.

                           (ii) As of the date of this Agreement, there are no
         options, warrants, calls, rights, or agreements (other than the
         Options, the Warrants, this Agreement and agreements with the Parent)
         to which General Physics or any Subsidiary of General Physics is a
         party or by which it or any such Subsidiary is bound obligating General
         Physics or any Subsidiary of General Physics to issue, deliver or sell,
         or cause to be issued, delivered or sold, additional shares of capital
         stock or any Voting Debt of General Physics or of any Subsidiary of
         General Physics or obligating General Physics or any Subsidiary of
         General Physics to grant, extend or enter into any such option,
         warrant, call, right or agreement. Assuming compliance with Section 
         2.1(c) after the Effective Time, there will be no option, warrant,
         call, right or agreement obligating General Physics or any Subsidiary
         of General Physics to issue, deliver or sell, or cause to be issued,
         delivered or sold, any shares of capital stock or any Voting Debt of
         General Physics or any Subsidiary of General Physics, or obligating
         General Physics or any Subsidiary of General Physics to grant, extend
         or enter into any such option, warrant, call, right or agreement.

                  (c)      Authority.

                           (i) General Physics has all requisite corporate power
         and authority to enter into this Agreement and, subject to approval of
         this Agreement and the Merger by the stockholders of General Physics,
         to consummate the transactions contemplated hereby. The execution and
         delivery of this Agreement and the consummation of the transactions
         contemplated hereby have been duly authorized by all necessary
         corporate action on the part of General Physics, subject to such
         approval of this Agreement by the stockholders of General Physics. This
         Agreement has been duly executed and delivered by General Physics and,
         subject to such approval of this Agreement by the stockholders

 

                                        9
<PAGE>   13
                                                    Agreement and Plan of Merger

         of General Physics, constitutes a valid and binding obligation of
         General Physics enforceable against it in accordance with its terms.
         The execution and delivery of this Agreement does not, and the
         consummation of the transactions contemplated hereby will not, conflict
         with, or result in any violation of, or default (with or without notice
         or lapse of time, or both) under, or give rise to a right of
         termination, cancellation or acceleration of any obligation or the loss
         of a material benefit under, or the creation of a Lien (any such
         conflict, violation, default, right of termination, cancellation or
         acceleration, loss or creation, a "Violation"), pursuant to any
         provision of the Certificate of Incorporation or By-laws of General
         Physics or any Subsidiary of General Physics or, except as set forth on
         Schedule 3.1(c) hereto, result in any Violation of any loan or credit
         agreement, note, mortgage, indenture, lease, GPC Plan or other
         agreement, obligation, instrument, permit, concession, franchise,
         license, judgment, order, decree, statute, law, ordinance, rule or
         regulation applicable to General Physics or any Subsidiary of General
         Physics or their respective properties or assets which Violation would
         have a GPC Material Adverse Effect.

                           (ii) No consent, approval, order or authorization of,
         or registration, declaration or filing with, any Governmental Entity is
         required by or with respect to General Physics or any of its
         Subsidiaries in connection with the execution and delivery of this
         Agreement by General Physics, or the consummation by General Physics of
         the transactions contemplated hereby, the failure to obtain which would
         have a GPC Material Adverse Effect, except for (A) the filing with the
         SEC of (x) a proxy statement in definitive form relating to the meeting
         of General Physics' stockholders (the "GPC Proxy Statement", which may
         be combined with the NPD Proxy Statement, as so combined, the "Proxy
         Statement"), and, if required, a meeting of the Parent's stockholders,
         to be held in connection with the Merger and (y) such reports under
         Sections 13(a), 13(d) and 16(a) of the Exchange Act, as may be required
         in connection with this Agreement and the transactions contemplated
         hereby, (B) the filing of the Merger Filings and appropriate documents
         with the relevant authorities of other states in which General Physics
         is qualified to do business, (C) such filings, authorizations, orders
         and approvals as may be required by foreign, state or local
         governmental authorities and (D) such filings, authorizations, orders
         and approvals (the "State Takeover Approvals") as may be required by
         state takeover laws.

                  (d) SEC Documents. General Physics has delivered or made
available to the Parent a true and complete copy of each material report,
schedule, registration statement and definitive proxy statement filed by General
Physics with the SEC since January 1, 1993 (as such documents have since the
time of their filing been amended, the "GPC SEC Documents") which are all the
documents (other than preliminary material) that General Physics has been
required to file with the SEC since such date. As of their respective dates, the
Form 10-K and 10-Q included in the GPC SEC Documents (the "GPC Reports")
complied in all material respects with

 

                                       10
<PAGE>   14
                                                    Agreement and Plan of Merger

the requirements of the Securities Act or the Exchange Act, as the case may be,
and the rules and regulations of the SEC thereunder applicable to such GPC
Reports and none of the GPC Reports contained any untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. The consolidated financial statements of
General Physics included in the GPC Reports comply as to form in all material
respects with applicable accounting requirements and with the published rules
and regulations of the SEC with respect thereto, have been prepared in
accordance with GAAP applied on a consistent basis during the periods involved
(except as may be indicated in the notes thereto or, in the case of the
unaudited statements, as permitted by Form 10-Q of the SEC) and fairly present
(subject, in the case of the unaudited statements, to normal, year-end audit
adjustments) the consolidated financial position of General Physics and its
consolidated Subsidiaries as at the dates thereof and the consolidated results
of their operations and cash flows for the periods then ended.

                  (e) Information Supplied. None of the information supplied or
to be supplied by General Physics for inclusion or incorporation by reference in
(i) the registration statement on Form S-4 (which may be combined, if
appropriate, with the Proxy Statement) to be filed with the SEC by the Parent in
connection with the issuance of shares of NPD Common Stock in the Merger (the
"S-4") will, at the time the S-4 is filed with the SEC and at the time it
becomes effective under the Securities Act, contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein not misleading, and (ii) the GPC
Proxy Statement will, at the date mailed to stockholders and at the times of the
meeting or meetings of stockholders to be held in connection with the Merger,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they are made, not
misleading. The GPC Proxy Statement will comply as to form in all material
respects with the provisions of the Exchange Act and the rules and regulations
thereunder.

                  (f) Compliance with Applicable Laws. The businesses of General
Physics and each of its Subsidiaries have been and are being conducted in
compliance with all applicable laws, rules, ordinances, regulations, licenses,
judgments, orders or decrees of federal, state, local and foreign governmental
authorities, except for possible violations which individually or in the
aggregate do not, and, insofar as reasonably can be foreseen, in the future will
not, have a GPC Material Adverse Effect. General Physics and each of its
Subsidiaries hold all certificates of authority, franchises, grants, permits,
licenses, easements, consents, certificates, variances, exemptions, orders and
approvals from all Governmental Entities (collectively, "GPC Permits") which are
necessary to own, lease and operate the assets and properties they currently
own, lease and operate and to conduct their respective businesses and operations
in the manner heretofore conducted and as proposed to be conducted, except for
those GPC Permits, the absence of which would not have a GPC Material Adverse
Effect.

 

                                       11
<PAGE>   15
                                                    Agreement and Plan of Merger

                  (g)      Financial Statements.

                           (i) General Physics has delivered, or (if not yet
         available) will promptly deliver when available (and in any event prior
         to the Effective Time), to the Parent complete and correct copies of:

                                    (A) the audited consolidated balance sheets
                           of General Physics and its then-existing Subsidiaries
                           as at December 31, 1995, 1994 and 1993, and the
                           related audited consolidated statements of operations
                           and stockholders' equity and cash flows, for the
                           fiscal years ended on those dates, together with all
                           footnotes; and

                                     (B) the unaudited interim consolidated
                           financial statements for General Physics and its
                           Subsidiaries as at, and for the fiscal periods ended
                           on, March 31, 1996, June 30, 1996 and September 30,
                           1996.

         All of such financial statements fairly present, or when delivered will
         fairly present, as the case may be (subject, in the case of unaudited
         interim financial statements, to normal, year-end audit adjustments
         which are not expected to be, individually or in the aggregate,
         materially adverse to General Physics and its Subsidiaries taken as a
         whole), the financial position, results of operations and cash flows of
         General Physics and each of its Subsidiaries as at the respective dates
         of such balance sheets and for each of the respective periods then
         ended, in conformity with GAAP applied on a basis consistent throughout
         the reported periods.

                           (ii) Neither such financial statements nor the
         financial statements of General Physics included in the GPC SEC
         Documents (A) contain or when delivered will contain, as the case may
         be, any item of extraordinary or non-recurring income or expense
         (except as specified therein); (B) reflect or when delivered will
         reflect, as the case may be, uncollectible accounts receivable without
         a reserve fairly stated for uncollectible amounts; and (C) reflect or
         when delivered will reflect, as the case may be, any write-off or
         revaluation of assets (except as specified therein). As at the
         respective dates of the balance sheets included in all such financial
         statements, there was no material liability, indebtedness or obligation
         of any nature or in any amount that should properly be reflected or
         provided for in financial statements prepared in conformity with GAAP
         applied on a basis consistent with that for prior periods, which was
         not fully reflected in such financial statements.

                  (h) Litigation. Except (x) for the case styled Dunlop v.
Pollak, et al. pending in the Court of Chancery of the State of Delaware (Civil
Action No. 15237-NC), (y) as disclosed in the GPC SEC Documents and (z) for
actions and suits arising in the ordinary course of General

 

                                       12
<PAGE>   16
                                                    Agreement and Plan of Merger

Physics' business, none of which if decided adversely to General Physics or its
Subsidiaries would have a material adverse effect on General Physics or any such
Subsidiary, there is no action, suit, proceeding or investigation, either at law
or in equity, at or before any commission or other administrative authority in
any domestic or foreign jurisdiction, of any kind now pending or, to General
Physics' knowledge, threatened, involving General Physics, any of its
Subsidiaries or any of their respective properties or assets that (i) if
asserted and decided adversely to General Physics or any such Subsidiary could,
individually or in the aggregate, have a GPC Material Adverse Effect, (ii)
questions the validity of this Agreement or (iii) seeks to delay, prohibit or
restrict in any manner the Merger or any action taken or to be taken by General
Physics or any of its Subsidiaries under this Agreement. Except as publicly
announced in the GPC SEC Documents or in any press release prior to the date
hereof, none of General Physics nor any of its Subsidiaries, nor any of their
respective properties or assets, is subject to any continuing order of, consent
decree, settlement agreement or other similar written agreement (other than
agreements related to the settlement of insurance claims in the ordinary course
of business), continuing investigation (other than regularly scheduled audits)
by any Governmental Entity, or any judicial, administrative or arbitral
judgment, order, writ, decree, injunction, restraint, or award of any
Governmental Entity or arbitrator, including without limitation cease-and-desist
or other orders. Neither General Physics nor any of its Subsidiaries has agreed
to, or is bound by, any extension or waiver of the statute of limitations
relating to any pending or potential action, suit, claim, proceeding or
investigation involving General Physics or any of its Subsidiaries (other than
extensions or waivers in connection with the settlement of insurance claims in
the ordinary course of business).

                  (i) Absence of Certain Changes. Since September 30, 1996,
except (A) for the execution and delivery of this Agreement and changes in its
properties or business attributable to the transactions contemplated by this
Agreement, and (B) as disclosed in General Physics' financial statements or in
the GPC SEC Documents previously delivered or made available to the Parent and
Newco, neither General Physics nor any of its Subsidiaries:

                           (i) had any change in its condition (financial or
         otherwise), operations, business, properties, assets or liabilities,
         other than changes in the ordinary course of business, none of which
         has been, individually or in the aggregate, materially adverse to
         General Physics or any such Subsidiary;

                           (ii) incurred or agreed to incur any material
         indebtedness for borrowed money or any other liabilities;

                           (iii) paid or obligated itself to pay in excess of
         $500,000 in the aggregate for any fixed assets;


 

                                       13
<PAGE>   17
                                                    Agreement and Plan of Merger

                           (iv) sold, transferred, leased or otherwise disposed
         of, or agreed to sell, transfer, lease or otherwise dispose of, (A) any
         properties or assets to any director, officer or employee of General
         Physics or of any Subsidiary of General Physics or any member of the
         family or any other affiliate of any of the foregoing or (B) any
         properties or assets having a fair market value of $250,000 or agreed
         to sell, transfer, lease or otherwise dispose of, any assets (other
         than securities) having a fair market value at the time of sale,
         transfer or disposition of $250,000;

                           (v) mortgaged, pledged or subjected to any charge,
         lien, claim or encumbrance, or agreed to mortgage, pledge or subject to
         any charge, lien, claim or encumbrance, any of its material properties
         or assets;

                           (vi) declared, set aside or paid any dividend or made
         any distribution (whether in cash, property or stock) with respect to
         any of its capital stock (other than the regular quarterly cash
         dividends of $.06 per share);

                           (vii) (A) increased, or agreed to increase, the
         compensation or bonuses or special compensation of any kind of any of
         its directors, officers or employees over the rate being paid to them
         on December 31, 1995, as set forth in General Physics' Proxy Statement
         for the 1995 Annual Meeting of Stockholders, other than normal merit
         and cost-of-living increases pursuant to customary arrangements
         consistently followed and other than increases in monthly and quarterly
         cash bonus accruals arising from General Physics' earnings pursuant to
         arrangements or formulas disclosed to senior management of National
         Patent, or (B) since December 31, 1995, paid or made provision for the
         payment of any bonus or similar compensation to any director, officer
         or employee (other than any insurance agent or independent contractor)
         of General Physics or any Subsidiary of General Physics (except for
         bonuses approved by the Board of Directors of General Physics and other
         than increases in monthly and quarterly cash bonus accruals arising
         from General Physics' earnings pursuant to arrangements or formulas
         disclosed to senior management of National Patent), or (C) entered into
         any employment, consulting or severance agreement or arrangement with
         any director, officer or employee (other than any agent or independent
         contractor) or adopted or increased any benefit under any insurance,
         pension or other employee benefit plan, payment or arrangement made to,
         for or with any director, officer or employee (other than any agent or
         independent contractor);

                           (viii) had any resignation or termination of
         employment of any of its key officers or employees, or become aware of
         any impending or threatened termination of employment, that would,
         individually or in the aggregate, have a GPC Material Adverse Effect;

 

                                       14
<PAGE>   18
                                                    Agreement and Plan of Merger

                           (ix) canceled, or agreed to cancel, any debts or
         claims over $250,000 in the aggregate or $50,000 individually other
         than in the ordinary course of business;

                           (x) made any material change in its accounting
         methods or practices with respect to its condition, operations,
         business, or practices; or

                           (xi) agreed or committed to do, or authorized or
         approved any action looking to, any of the foregoing.

                  (j) Material Contracts. Neither General Physics nor any of its
Subsidiaries is a party to any contract that, individually or in the aggregate,
would have a GPC Material Adverse Effect, nor the performance of which will
likely have a GPC Material Adverse Effect. Neither General Physics nor any of
its Subsidiaries is in default in the observance or the performance of any term
or obligation to be performed by it under any material contract except the
effect of which defaults singly or in the aggregate would not have a GPC
Material Adverse Effect. To the knowledge of General Physics, no other person is
in default in any material respect in the observance or the performance of any
term or obligation to be performed by it under any material contract.

                  (k) Employee Benefit Plans.

                           (i) Certain Terms. The term "GPC Plan" means any
         employee benefit plan, as defined in Section 3(3) of ERISA or any other
         material benefit arrangement (including without limitation (A) any
         employment or consulting agreement, (B) any incentive bonus or deferred
         bonus arrangement, (C) any arrangement providing termination allowance,
         severance or similar benefits, (D) any equity compensation plan, and
         (E) any deferred compensation plan) sponsored, maintained or
         contributed to by General Physics or any "Controlled Company" for the
         benefit of any of their employees or former employees. For purposes of
         this Section 3.1(k), "Controlled Company" shall mean any entity that,
         together with General Physics as of the relevant determination date
         under ERISA, is or was required to be treated as a single employer
         under Section 414 of the Code and any reference to General Physics in
         this Section 3.1(m) shall also include a reference to a Controlled
         Company.

                           (ii) No Title IV Plans. No GPC Plan (whether or not
         terminated since 1990) is regulated under Title IV of ERISA and there
         are no circumstances under which General Physics would have liability
         under Title IV of ERISA.

                           (iii) Compliance with Law. General Physics has
         operated, and has caused its appointees and nominees to operate, each
         GPC Plan in a manner which is in material compliance with the terms
         thereof and with all applicable law, regulations and

 

                                       15
<PAGE>   19
                                                    Agreement and Plan of Merger

         administrative agency rulings and requirements applicable thereto.
         There have been no material adverse changes in the financial status of
         any GPC Plan since June 30, 1996. No benefit under any GPC Plan,
         including without limitation any severance or parachute payment plan or
         agreement, will be established or become accelerated, vested or payable
         by reason of any transaction contemplated under this Agreement (except
         as may be provided in Section 2.1(c)).

                           (iv) Contributions. Full payment has been made of all
         amounts which General Physics is required, under applicable law or
         under any GPC Plan or any agreement related to any GPC Plan to which
         General Physics is a party, to have paid as contributions thereto as of
         the last day of the most recent fiscal year of each GPC Plan ended
         prior to the date hereof.

                           (v) Tax Qualification. Each GPC Plan intended to be
         qualified under Sections 401(a), 401(k) and 501(a) of the Code either
         has been determined to be so qualified by the Internal Revenue Service
         or has been submitted to the Internal Revenue Services for a
         determination with respect to such qualified status. Each GPC Plan that
         has been submitted to the Internal Revenue Service for a determination
         with respect to its qualified status has been submitted in a timely
         manner so that any amendments necessary to qualify the plan from its
         inception can be made within the remedial amendment period established
         under Section 401(b) of the Code. To the knowledge of General Physics,
         nothing has occurred since such determination, or submission, as
         applicable, to affect materially and adversely the qualification of any
         such GPC Plan.

                           (vi) Tax or Civil Liability. General Physics has not
         participated in any conduct that could result in the imposition upon
         General Physics of any material excise tax under Section 4971 through
         4980B of the Code or material civil liability under Section 502(i) of
         ERISA with respect to any GPC Plan.

                           (vii) Claims Liability. There is no action, claim or
         demand of any kind (other than routine claims for benefits) that has
         been brought or threatened against any GPC Plan, or the assets thereof,
         against any fiduciary of any such GPC Plan, or against General Physics
         with respect to any GPC Plan, and General Physics has no knowledge of
         any pending investigation or administrative review by any Governmental
         Entity that could result in the imposition on General Physics of any
         penalty or assessment in connection with any GPC Plan.

                           (viii) Retiree Welfare Coverage. No GPC Plan provides
         any health, life or other welfare coverage to employees of General
         Physics beyond termination of their employment with General Physics by
         reason of retirement or otherwise, other than

 

                                       16
<PAGE>   20
                                                    Agreement and Plan of Merger

         coverage as may be required under Section 4980B of the Code or Part 6
         of ERISA, or under the continuation of coverage provisions of the laws
         of any state or locality.

                           (ix) Reporting and Disclosure Obligations. General
         Physics has complied in all material respects with all applicable
         reporting and disclosure requirements of Title I of ERISA with respect
         to all GPC Plans.

                  (l)      Taxes.

                           (i) Each of General Physics and its Subsidiaries has
         filed all Tax returns and reports required to be filed by it or
         requests for extensions to file such returns or reports have been
         timely filed, granted and have not expired, except to the extent that
         such failures to file or to have extensions granted that remain in
         effect individually or in the aggregate would not have a GPC Material
         Adverse Effect. All Tax returns filed by General Physics and each of
         its Subsidiaries are complete and accurate except to the extent that
         such failure to be complete and accurate would not have a GPC Material
         Adverse Effect. General Physics and each of its Subsidiaries has paid
         (or General Physics has paid on the Subsidiaries' behalf) all Taxes
         shown as due on such returns, and the most recent financial statements
         contained in the GPC SEC Documents reflect an adequate reserve, in
         accordance with GAAP, for all Taxes payable by General Physics and its
         Subsidiaries for all taxable periods and portions thereof accrued
         through the date of such financial statements.

                           (ii) No deficiencies for any Taxes have been
         proposed, asserted or assessed against General Physics or any of its
         Subsidiaries that are not adequately reserved for, except for
         deficiencies that individually or in the aggregate would not have a GPC
         Material Adverse Effect, and no requests for waivers of the time to
         assess any such Taxes have been granted or are pending.

         SECTION 3.2. REPRESENTATIONS AND WARRANTIES OF THE PARENT AND NEWCO.
The Parent and Newco represent and warrant to General Physics as follows:

                  (a) Organization; Standing and Power. Each of the Parent and
Newco is a corporation duly organized, validly existing and in good standing
under the laws of its state of incorporation or organization and has all
requisite power and authority to own, lease and operate its properties and to
carry on its business as now being conducted, and is duly qualified and in good
standing to do business in each jurisdiction in which the nature of its business
or the ownership or leasing of its properties makes such qualification
necessary, except where the failure to be so qualified would not have a NPD
Material Adverse Effect.

 

                                       17
<PAGE>   21
                                                    Agreement and Plan of Merger

                  (b)      Capital Structure.

                           (i) As of the date hereof, the authorized capital
         stock of the Parent consists of 40,000,000 shares of NPD Common Stock,
         2,800,000 shares of Class B capital stock, $.01 par value per share
         (the "Class B Stock"), and 10,000,000 shares of Preferred Stock, $.01
         par value per share. As of the close of business on September 30, 1996:

                                    (A) 7,402,747 shares of NPD Common Stock
                           were outstanding;

                                    (B) an aggregate of 1,612,926 shares of NPD
                           Common Stock were reserved for issuance pursuant to
                           the Parent stock option plans and the Parent
                           restricted stock plans (collectively, "Parent Stock
                           Plans"), and pursuant to conversion of the
                           Convertible Debentures;

                                    (C) 1,497 shares of NPD Common Stock and no
                           shares of Class B Stock were held by the Parent in
                           its treasury;

                                    (D) 62,500 shares of Class B Stock were
                           issued and outstanding;

                                    (E) no shares of Preferred Stock were issued
                           and outstanding; and

                                    (F) no Voting Debt (other than the
                           Convertible Debentures) was issued or outstanding.

         All outstanding shares of the Parent's capital stock are, and the
         shares of NPD Common Stock (x) to be issued pursuant to or as
         specifically contemplated by this Agreement, and (y) when issued in
         accordance with this Agreement, will be validly issued, fully paid and
         nonassessable and not subject to preemptive rights.

                           (ii) As of the date of this Agreement, except for
         this Agreement, options to purchase NPD Class B Stock, the Convertible
         Debentures, and the Parent Stock Plans outstanding, there are no
         options, warrants, calls, rights or agreements to which the Parent or
         any Subsidiary of the Parent is a party or by which it or any such
         Subsidiary is bound obligating the Parent or any Subsidiary of the
         Parent to issue, deliver or sell, or cause to be issued, delivered or
         sold, additional shares of capital stock or any Voting Debt of the
         Parent or of any Subsidiary of the Parent or obligating the Parent or
         any Subsidiary of the Parent to issue, deliver or sell, or cause to be
         issued, delivered or sold, additional shares of capital stock of the
         Parent or of any Subsidiary of the Parent to grant, extend or enter
         into any such option, warrant, call, right or agreement.

 

                                       18
<PAGE>   22
                                                    Agreement and Plan of Merger

                           (iii) As of the date hereof, the authorized capital
         stock of Newco consists of 1,000 shares of Common Stock, par value $.01
         per share, of which 100 shares are issued and outstanding.

                  (c)      Authority.

                           (i) The Parent and Newco have all requisite corporate
         power and authority to enter into this Agreement and to consummate the
         transactions contemplated hereby. The execution and delivery of this
         Agreement and the consummation of the transactions contemplated hereby
         have been duly authorized by all necessary corporate action on the part
         of the Parent and Newco, except that the approval of the Parent's
         stockholders of this Agreement and the Merger and the transactions
         contemplated hereby may be required. This Agreement has been duly
         executed and delivered by the Parent and Newco and each constitutes a
         valid and binding obligation of the Parent and Newco enforceable
         against each in accordance with its terms. The execution and delivery
         of this Agreement does not, and the consummation of the transactions
         contemplated hereby will not, conflict with, or result in any Violation
         pursuant to any provision of the Certificate of Incorporation or
         By-laws of the Parent, except as set forth on Schedule 3.2(c) hereto or
         result in any Violation of any material loan or credit agreement, note,
         mortgage, indenture, lease, NPD Plan or other material agreement,
         obligation, instrument, permit, concession, franchise, license,
         judgment, order, decree, statute, law, ordinance, rule or regulation
         applicable to the Parent or any Subsidiary of the Parent or their
         respective properties or assets, which Violation would have a NPD
         Material Adverse Effect.

                           (ii) No consent, approval, order or authorization of,
         or registration, declaration or filing with, any Governmental Entity is
         required by or with respect to the Parent or any of its Subsidiaries in
         connection with the execution and delivery of this Agreement by the
         Parent and Newco or the consummation by the Parent and Newco of the
         transactions contemplated hereby, the failure to obtain which would
         have a NPD Material Adverse Effect, except for (A) the filing with the
         SEC of the S-4, a proxy statement in definitive form relating to the
         meeting of the Parent's stockholders (the "NPD Proxy Statement"), the
         GPC Proxy Statement and such reports under Sections 13(a), 13(d) and
         16(a) of the Exchange Act, as may be required in connection with this
         Agreement, and the transactions contemplated hereby and the obtaining
         from the SEC of such orders as may be so required, (B) the filing of
         such documents with, and the obtaining of such orders from, the various
         state authorities, including state securities authorities, that are
         required in connection with the transactions contemplated by this
         Agreement, (C) the filing of the Merger Filings with the Secretary of
         State and appropriate documents with the relevant authorities of other
         states in which the Parent is qualified to do business and (D) the
         State Takeover Approvals.

 

                                       19
<PAGE>   23
                                                    Agreement and Plan of Merger

                  (d) SEC Documents. The Parent has delivered or made available
to General Physics a true and complete copy of each material report, schedule,
registration statement and definitive proxy statement filed by the Parent with
the SEC since January 1, 1993 (as such documents have since the time of their
filing been amended, the "NPD SEC Documents") which are all the documents (other
than preliminary material) that the Parent was required to file with the SEC
since such date. As of their respective dates, the Forms 10-K and 10-Q included
in the NPD SEC Documents (the "NPD Reports") complied in all material respects
with the requirements of the Securities Act or the Exchange Act, as the case may
be, and the rules and regulations of the SEC thereunder applicable to such NPD
Reports and none of the NPD Reports contained any untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. The consolidated financial statements of
the Parent and its consolidated Subsidiaries included in the NPD Reports comply
as to form in all material respects with applicable accounting requirements and
with the published rules and regulations of the SEC with respect thereto, have
been prepared in accordance with GAAP applied on a consistent basis during the
periods involved (except as may be indicated in the notes thereto or, in the
case of the unaudited statements, as permitted by Form 10-Q of the SEC) and
fairly present (subject, in the case of the unaudited statements, to normal
year-end audit adjustments) the consolidated financial position of the Parent
and its consolidated Subsidiaries as at the dates thereof and the consolidated
results of their operations and cash flows for the periods then ended. No
representation or warranty is made as to any of the matters in this Section 
3.2(d) with respect to General Physics or its subsidiaries.

                  (e) Information Supplied. None of the information supplied or
to be supplied by the Parent or Newco for inclusion or incorporation by
reference in (i) the S-4 will, at the time the S-4 is filed with the SEC and at
the time it becomes effective under the Securities Act, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein not misleading and
(ii) the NPD Proxy Statement will, at the date mailed to stockholders and at the
times of the meeting or meetings of stockholders to be held in connection with
the Merger, contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary in order to make the
statements therein, in light of the circumstances under which they are made, not
misleading. The NPD Proxy Statement will comply as to form in all material
respects with the provisions of the Exchange Act and the rules and regulations
thereunder, and the S-4 will comply as to form in all material respects with the
provisions of the Securities Act and the rules and regulations thereunder.

                  (f) Compliance with Applicable Laws. The businesses of the
Parent and each of its Subsidiaries have been and are being conducted in
compliance with all applicable laws, rules, ordinances, regulations, licenses,
judgments, orders or decrees of federal, state, local and foreign governmental
authorities, except for possible violations which individually or in the
aggregate do

 

                                       20
<PAGE>   24
                                                    Agreement and Plan of Merger

not, and, insofar as reasonably can be foreseen, in the future will not, have a
NPD Material Adverse Effect. The Parent and each Subsidiary of the Parent hold
all certificates of authority, franchises, grants, permits, licenses, easements,
consents, certificates, variances, exemptions, orders and approvals from all
Governmental Entities (collectively, the "NPD Permits") which are necessary to
own, lease and operate the assets and properties they currently own, lease and
operate and to conduct their respective businesses and operations in the manner
heretofore conducted and as proposed to be conducted, except for those NPD
Permits, the absence of which would not have a NPD Material Adverse Effect.

                  (g)      Financial Statements.

                           (i) The Parent has delivered, or (if not yet
         available) will promptly deliver when available (and in any event prior
         to the Effective Time), to General Physics complete and correct copies
         of:

                                    (A) the audited consolidated balance sheets
                  of the Parent and its subsidiaries as at December 31, 1995,
                  1994 and 1993, and the related audited consolidated statements
                  of operations and stockholders' equity and cash flows, for the
                  fiscal years ended on those dates, together with all
                  footnotes; and

                                     (B) the unaudited interim consolidated
                  financial statements for the Parent and its subsidiaries as
                  at, and for the fiscal periods ended on, March 31, 1996, June
                  30, 1996 and September 30, 1996.

         All of such financial statements fairly present, or when delivered will
         fairly present, as the case may be (subject, in the case of unaudited
         interim financial statements, to normal year-end audit adjustments
         which are not expected to be, individually or in the aggregate,
         materially adverse to the Parent and its Subsidiaries taken as a
         whole), the financial position, results of operations and cash flows of
         the Parent and each of its Subsidiaries as at the respective dates of
         such balance sheets and for each of the respective periods then ended,
         in conformity with GAAP applied on a basis consistent throughout the
         reported periods (except no representation or warranty is provided with
         respect to General Physics or any of its subsidiaries).

                           (ii) Neither such financial statements nor the
         financial statements of the Parent included in the NPD SEC Documents
         (except no representation or warranty is provided with respect to
         General Physics or any of its subsidiaries) (A) contain or when
         delivered will contain, as the case may be, any item of extraordinary
         or non-recurring income or expense (except as specified therein); (B)
         reflect or when delivered will reflect, as the case may be,
         uncollectible accounts receivable without a reserve fairly stated for
         uncollectible amounts; and (C) reflect or when delivered will reflect,
         as the case may be,

 

                                       21
<PAGE>   25
                                                    Agreement and Plan of Merger

         any write-off or revaluation of assets (except as specified therein).
         As at the respective dates of the balance sheets included in all such
         financial statements, there was no material liability, indebtedness or
         obligation of any nature or in any amount that should properly be
         reflected or provided for in financial statements prepared in
         conformity with GAAP applied on a basis consistent with that for prior
         periods, which was not fully reflected in such financial statements
         (except no representation or warranty is provided with respect to
         General Physics or any of its subsidiaries).

                  (h) Litigation. Except (A) for the case styled Dunlop v.
Pollak, et al. pending in the Court of Chancery of the State of Delaware (Civil
Action No. 15237-NC), (B) as disclosed in the NPD SEC Documents and (C) for
actions and suits arising in the ordinary course of business, there is no
action, suit, proceeding or investigation, either at law or in equity, at or
before any commission or other administrative authority in any domestic or
foreign jurisdiction, of any kind now pending or, to the best of the Parent's or
Newco's knowledge, threatened, involving the Parent, Newco or any other
Subsidiary of the Parent, or any of the respective properties or assets of the
Parent or Newco that (i) if asserted and decided adversely to the Parent or
Newco, could, individually or in the aggregate, materially and adversely affect
the condition (financial or otherwise), operations, business, properties, assets
or liabilities of the Parent and its Subsidiaries, taken as a whole, (ii)
questions the validity of this Agreement, or (iii) seeks to delay, prohibit or
restrict in any manner any action taken or to be taken by the Parent or Newco
under this Agreement. Except as publicly announced in the NPD SEC Documents or
in any press release prior to the date hereof, none of the Parent nor any
Subsidiary of the Parent, nor any of their respective properties or assets is
subject to any material continuing order of, consent decree, settlement
agreement or other similar written agreement (other than agreements in the
ordinary course of business), continuing investigation (other than regularly
scheduled audits) by any Governmental Entity, or any judicial administrative or
arbitral judgment, order, writ, decree, injunction, restraint, or award of any
Governmental Entity or arbitrator, including without limitation cease-and-desist
or other orders.

                  (i) Absence of Certain Changes or Events. Except as disclosed
in the NPD SEC Documents filed prior to or subsequent to the date of this
Agreement or in the audited consolidated balance sheets of the Parent and its
Subsidiaries and the related consolidated statements of income, stockholders'
equity and cash flows as of and for the period ended December 31, 1995, true and
correct copies of which have been delivered to General Physics, or except as
contemplated by this Agreement, since September 30, 1996, the Parent and its
Subsidiaries have conducted their respective businesses only in the ordinary and
usual course, and, as of the date of this Agreement, the Parent has not
undergone or suffered any change in its financial condition, properties,
business or results of operations which has had, individually or in the
aggregate, a NPD Material Adverse Effect.

 

                                       22
<PAGE>   26
                                                    Agreement and Plan of Merger

                  (j) Material Contracts. Neither the Parent nor any of its
Subsidiaries is a party to any contract that, individually or in the aggregate,
would have a NPD Material Adverse Effect, nor the performance of which will
likely have a NPD Material Adverse Effect. Neither the Parent nor any of its
Subsidiaries is in default in the observance or the performance of any term or
obligation to be performed by it under any material contract except the effect
of which defaults singly or in the aggregate would not have a NPD Material
Adverse Effect. To the knowledge of the Parent, no other person is in default in
any material respect in the observance or the performance of any term or
obligation to be performed by it under any material contract.

                  (k) Employee Benefit Plans.

                           (i) Certain Terms. The term "NPD Plan" means any
         employee benefit plan, as defined in Section 3(3) of ERISA or any other
         material benefit arrangement (including without limitation (A) any
         employment or consulting agreement, (B) any incentive bonus or deferred
         bonus arrangement, (C) any arrangement providing termination allowance,
         severance or similar benefits, (D) any equity compensation plan, and
         (E) any deferred compensation plan) sponsored, maintained or
         contributed to by the Parent or any NPD Controlled Company for the
         benefit of any of their employees or former employees. For purposes of
         this Section 3.2(k), "NPD Controlled Company" shall mean any entity
         (other than General Physics and any Controlled Company) that, together
         with the Parent as of the relevant determination date under ERISA, is
         or was required to be treated as a single employer under Section 414 of
         the Code and any reference to the Parent in this Section 3.2(k) shall
         also include a reference to a NPD Controlled Company.

                           (ii) No Title IV Plans. Except as disclosed in
         National Patent's most recent financial statements included in the NPD
         SEC Documents, no NPD Plan (whether or not terminated) is regulated
         under Title IV of ERISA and there are no circumstances under which the
         Parent would have liability under Title IV of ERISA.

                           (iii) Compliance with Law. The Parent has operated,
         and has caused its appointees and nominees to operate, each NPD Plan in
         a manner which is in material compliance with the terms thereof and
         with all applicable law, regulations and administrative agency rulings
         and requirements applicable thereto. There have been no material
         adverse changes in the financial status of any NPD Plan since September
         30, 1996. No benefit under any NPD Plan, including without limitation
         any severance or parachute payment plan or agreement, will be
         established or become accelerated, vested or payable by reason of any
         transaction contemplated under this Agreement.

                           (iv) Contributions. Full payment has been made of all
         amounts which the Parent is required, under applicable law or under any
         NPD Plan or any agreement related to any NPD Plan to which the Parent
         is a party, to have paid as contributions

 

                                       23
<PAGE>   27
                                                    Agreement and Plan of Merger

         thereto as of the last day of the most recent fiscal year of each NPD
         Plan ended prior to the date hereof.

                           (v) Tax Qualification. Each NPD Plan intended to be
         qualified under Sections 401(a), 401(k) and 501(a) of the Code either
         has been determined to be so qualified by the Internal Revenue Service
         or has been submitted to the Internal Revenue Services for a
         determination with respect to such qualified status. Each NPD Plan that
         has been submitted to the Internal Revenue Service for a determination
         with respect to its qualified status has been submitted in a timely
         manner so that any amendments necessary to qualify the plan from its
         inception can be made within the remedial amendment period established
         under Section 401(b) of the Code. To the knowledge of the Parent,
         nothing has occurred since such determination, or submission, as
         applicable, to affect materially and adversely the qualification of any
         such NPD Plan.

                           (vi) Tax or Civil Liability. The Parent has not
         participated in any conduct that could result in the imposition upon
         the Parent of any material excise tax under Section 4971 through 4980B
         of the Code or material civil liability under Section 502(i) of ERISA
         with respect to any NPD Plan.

                           (vii) Claims Liability. There is no action, claim or
         demand of any kind (other than routine claims for benefits) that has
         been brought or threatened against any NPD Plan, or the assets thereof,
         against any fiduciary of any such NPD Plan, or against the Parent with
         respect to any NPD Plan, and the Parent has no knowledge of any pending
         investigation or administrative review by any Governmental Entity that
         could result in the imposition on the Parent of any penalty or
         assessment in connection with any NPD Plan.

                           (viii) Retiree Welfare Coverage. No NPD Plan provides
         any health, life or other welfare coverage to employees of General
         Physics beyond termination of their employment with General Physics by
         reason of retirement or otherwise, other than coverage as may be
         required under Section 4980B of the Code or Part 6 of ERISA, or under
         the continuation of coverage provisions of the laws of any state or
         locality.

                           (ix) Reporting and Disclosure Obligations. The Parent
         has complied in all material respects with all applicable reporting and
         disclosure requirements of Title I of ERISA with respect to all NPD
         Plans.

                  (l)      Taxes.

                           (i) Each of National Patent and its Subsidiaries has
         filed all Tax returns and reports required to be filed by it or
         requests for extensions to file such returns or

 

                                       24
<PAGE>   28
                                                    Agreement and Plan of Merger

         reports have been timely filed, granted and have not expired, except to
         the extent that such failures to file or to have extensions granted
         that remain in effect individually or in the aggregate would not have a
         NPD Material Adverse Effect. All Tax returns filed by National Patent
         and each of its Subsidiaries are complete and accurate except to the
         extent that such failure to be complete and accurate would not have a
         NPD Material Adverse Effect. National Patent and each of its
         Subsidiaries has paid (or National Patent has paid on the Subsidiaries'
         behalf) all Taxes shown as due on such returns, and the most recent
         financial statements contained in the NPD SEC Documents reflect an
         adequate reserve, in accordance with GAAP, for all Taxes payable by
         National Patent and its Subsidiaries for all taxable periods and
         portions thereof accrued through the date of such financial statements.
         No representation or warranty is made with respect to General Physics
         or any of its Subsidiaries.

                           (ii) No deficiencies for any Taxes have been
         proposed, asserted or assessed against National Patent or any of its
         Subsidiaries that are not adequately reserved for, except for
         deficiencies that individually or in the aggregate would not have a NPD
         Material Adverse Effect, and no requests for waivers of the time to
         assess any such Taxes have been granted or are pending. No
         representation or warranty is made with respect to General Physics or
         any of its Subsidiaries.

                                    ARTICLE 4

                    COVENANTS RELATING TO CONDUCT OF BUSINESS
                                 PRIOR TO MERGER

         SECTION 4.1. CERTAIN COVENANTS.

                  (a) Conduct of Business of the Parent. During the period from
the date of this Agreement to the Effective Time, the Parent shall, and shall
cause its Subsidiaries to, carry on their respective businesses only in the
ordinary course of business substantially consistent with past practice and, to
the extent consistent therewith, use all reasonable best efforts to preserve
intact their current business organizations, keep available the services of
their current officers and employees and preserve their relationships with
persons having business dealings with them to the end that their goodwill and
ongoing businesses shall be unimpaired at the Effective Time. Without limiting
the generality of the foregoing, during the period from the date of this
Agreement to the Effective Time, except as expressly contemplated by this
Agreement, the Parent shall not, and shall not permit any of its Subsidiaries
to, without the prior written consent of General Physics (by action of the
Special Committee):

 

                                       25
<PAGE>   29
                                                    Agreement and Plan of Merger

                           (i) amend its certificate of incorporation, by-laws
         or other comparable charter or organizational documents except that the
         Parent may amend its certificate of incorporation to decrease the
         number of authorized shares of the NPD Common Stock to 25,000,000 and
         to add provisions requiring redemption or disposition of shares of a
         foreign owner of NPD Common Stock in the event that the number of
         shares beneficially owned by such foreign owner exceeds a threshold
         percentage of issued and outstanding shares of NPD Common Stock;

                           (ii) (x) declare, set aside or pay any cash dividends
         on, or make any other cash distributions in respect of, any outstanding
         capital stock of the Parent, or (y) split, combine or reclassify any of
         the Parent's outstanding capital stock or issue or authorize the
         issuance of any other securities in respect of, in lieu of or in
         substitution for shares of its outstanding capital stock;

                           (iii) merge or consolidate with any other person
         (other than a merger or consolidation of a subsidiary of the Parent
         with a wholly-owned subsidiary of the Parent);

                           (iv) sell, lease, license, mortgage or otherwise
         encumber or subject to any Lien or otherwise dispose of (or agree to
         any of the foregoing) any of its properties or assets that are
         material, individually or in the aggregate, to the Parent, except in
         the ordinary course of business substantially consistent with past
         practice and sales of investment assets in the ordinary course of
         business;

                           (v) incur any indebtedness for borrowed money or
         guarantee or otherwise become responsible for any such indebtedness of
         another person other than (x) pursuant to existing line of credit
         arrangements of the Parent or its subsidiaries and letters of credit
         and related agreements of the Parent or its subsidiaries in each case
         in the ordinary course of business substantially consistent with past
         practice or (y) indebtedness in principal amounts of less than
         $10,000,000 in the aggregate;

                           (vi) settle or compromise any derivative suit or
         other litigation or claim arising out of the transactions contemplated
         hereby, or any other litigation or claim involving the Parent or Newco
         if the settlement thereof involves payment of in excess of $100,000;
         provided, that General Physics will not unreasonably withhold its
         consent to any such settlement or compromise;

                           (vii) take any action that requires the approval of
         its stockholders;

                           (viii) take any action that would, or would be
         reasonably likely to, result in any of the representations and
         warranties of the Parent, Newco or General Physics set

 

                                       26
<PAGE>   30
                                                    Agreement and Plan of Merger

         forth in this Agreement not being true in all material respects as of
         or at any time prior to the Effective Time or in any of the conditions
         to the Merger set forth in Article 6 not being satisfied; or

                           (ix) agree in writing or otherwise to take any of the
         actions prohibited by this Section 4.1(a).

                  (b) Conduct of Business of General Physics. During the period
from the date of this Agreement to the Effective Time, General Physics shall and
shall cause its subsidiaries to, carry on their respective businesses only in
the ordinary course of business substantially consistent with past practice and,
to the extent consistent therewith, use all reasonable best efforts to preserve
intact their current business organizations and preserve their relationships
with persons having business dealings with them to the end that their goodwill
and ongoing businesses shall be unimpaired at the Effective Time (and the
Special Committee shall not take any affirmative action that would cause General
Physics or its subsidiaries to breach the foregoing provisions of this clause
(b)). Without limiting the generality of the foregoing, during the period from
the date of this Agreement to the Effective Time, General Physics and its
subsidiaries shall not (without the prior written consent of the Special
Committee), and the Special Committee shall not (without the prior written
consent of the Parent) take any affirmative action that would cause General
Physics or its subsidiaries to, except as expressly contemplated by this
Agreement:

                           (i) (x) declare, set aside or pay any dividends on,
         or make any other distributions (whether in cash, stock or property) in
         respect of, any outstanding capital stock of General Physics, except
         for General Physics' regular quarterly dividends of up to $0.06 per
         fiscal quarter per share, or (y) split, combine or reclassify any of
         General Physics' outstanding capital stock or issue or authorize the
         issuance of any other securities in respect of, in lieu of or in
         substitution for shares of its outstanding capital stock or (z)
         purchase, redeem or otherwise acquire any shares of outstanding capital
         stock or other securities of General Physics or its subsidiaries or any
         rights, warrants or options to acquire any such shares or securities;

                           (ii) issue, sell, grant, pledge or otherwise encumber
         any shares of its capital stock, any other voting securities or any
         securities convertible into, or any rights, warrants or options to
         acquire, any such shares, voting securities or convertible securities
         other than any such issuance to National Patent or pursuant to (x) the
         exercise of stock options outstanding on the date hereof or (y) an
         employee benefit plan approved by the Board of Directors of General
         Physics;

                           (iii) amend its certificate of incorporation, by-laws
         or other comparable charter or organizational documents;

 

                                       27
<PAGE>   31
                                                    Agreement and Plan of Merger

                           (iv) merge or consolidate with any other person
         (other than a merger or consolidation of a subsidiary of General
         Physics with a wholly-owned subsidiary of General Physics) or acquire
         (by merger, consolidation, acquisition of assets or otherwise) (x) any
         corporation, partnership, joint venture, association or other business
         organization or division thereof or (y) any assets that are material,
         individually or in the aggregate, to General Physics and its
         subsidiaries taken as a whole;

                           (v) sell, lease, license, mortgage or otherwise
         encumber or subject to any Lien or otherwise dispose of (or agree to
         any of the foregoing) any of its properties or assets that are
         material, individually or in the aggregate, to General Physics and its
         subsidiaries, except in the ordinary course of business substantially
         consistent with past practice and sales of investment assets in the
         ordinary course of business;

                           (vi) (x) incur any indebtedness for borrowed money or
         guarantee or otherwise become responsible for any such indebtedness of
         another person other than pursuant to existing line of credit
         arrangements of General Physics or its subsidiaries and letters of
         credit and related agreements of General Physics or its subsidiaries in
         each case in the ordinary course of business substantially consistent
         with past practice; or (y) make any loans, advances or capital
         contributions to, or investments in, any other person, other than (A)
         to National Patent, General Physics or to any direct or indirect
         wholly-owned Subsidiary of General Physics or National Patent; (B) in
         the ordinary course of business (substantially consistent with past
         practice); or (C) as may be required under the terms of the joint
         venture agreements for the Aerospace Center Support Joint Venture and
         the Fleet Technical Support Associates Joint Venture (as such terms are
         in effect as of the date hereof) (copies of such agreements having been
         provided to the Parent);

                           (vii) (x) enter into, adopt, amend (except as may be
         required by law) or terminate any employee benefit plan or any
         agreement, arrangement, plan or policy between General Physics and one
         or more of its directors, officers or employees or (y) increase in any
         manner the compensation or fringe benefits (including severance
         benefits) of any director, officer or employee or pay any benefit not
         required by any plan and arrangement as in effect as of the date
         hereof;

                           (viii) settle or compromise any derivative suit or
         other litigation or claim arising out of the transactions contemplated
         hereby, or any other litigation or claim involving General Physics if
         the settlement thereof involves payment of in excess of $100,000;
         provided, that the Parent will not unreasonably withhold its consent to
         any such settlement or compromise;

 

                                       28
<PAGE>   32
                                                    Agreement and Plan of Merger

                           (ix) make any material change in accounting methods,
         principles or practices used by General Physics or any of its
         subsidiaries except for any such change required by reason of a
         concurrent change in GAAP;

                           (x) take any action that requires the approval of its
         stockholders;

                           (xi) take any action that would, or would be
         reasonably likely to, result in any of General Physics' representations
         and warranties set forth in this Agreement not being true in all
         material respects as of or at any time prior to the Effective Time or
         in any of the conditions to the Merger set forth in Article 6 not being
         satisfied; or

                           (xii) agree in writing or otherwise to take any of
         the actions prohibited by this Section 4.1(b).


                                    ARTICLE 5

                              ADDITIONAL AGREEMENTS

         SECTION 5.1. PREPARATION OF FORM S-4, THE GPC PROXY
                      STATEMENT AND THE NPD PROXY STATEMENT.

                  (a) As soon as practicable following the date of this
Agreement, the Parent and General Physics jointly shall prepare and file with
the SEC a proxy statement (which shall be the GPC Proxy Statement and the NPD
Proxy Statement) and the Parent shall promptly prepare and file with the SEC the
S-4 (which may be combined, if appropriate, with the GPC Proxy Statement and the
NPD Proxy Statement). The Parent shall use its best efforts to have the S-4
declared effective under the Securities Act as promptly as practicable after
such filing. The Parent shall also take, in consultation with General Physics
and its counsel, any action (other than qualifying to do business in any
jurisdiction in which it is not now so qualified) required to be taken under any
applicable state securities laws in connection with the issuance of Parent
Common Stock in the Merger and General Physics shall furnish all information
concerning General Physics and the holders of GPC Common Stock as may be
reasonably requested in connection with such action.

                  (b) As soon as practicable after the S-4 is declared effective
by the SEC, (x) the Parent shall prepare, in consultation with General Physics
and its counsel, proxy or consent solicitation materials based upon and
incorporating the NPD Proxy Statement and shall cause such materials to be
mailed to the Parent's stockholders as promptly as practicable thereafter; and
(y) General Physics shall prepare, in consultation with the Parent and its
counsel, proxy or

 

                                       29
<PAGE>   33
                                                    Agreement and Plan of Merger

consent solicitation materials based upon and incorporating the GPC Proxy
Statement and shall cause such materials to be mailed to General Physics'
stockholders as promptly as practicable thereafter.

         SECTION 5.2. MEETINGS OF STOCKHOLDERS.

                  (a) The Parent will take all actions necessary in accordance
with applicable law and the NPD Charter and the Parent By-laws to convene as
promptly as practicable a meeting of its stockholders (the "NPD Stockholders
Meeting") to consider and vote upon the approval of this Agreement and the
Merger and the issuance of the Parent Common Stock in connection with the Merger
in accordance with the DGCL and the rules of the American Stock Exchange
("AMEX"); except that no such meeting need be convened if the Board of Directors
of the Parent, in accordance with such Board's fiduciary duties to the Parent's
stockholders, will not recommend approval by the Parent's stockholders of this
Agreement and the Merger.

                  (b) General Physics will take all actions necessary in
accordance with applicable law and the GPC Charter and GPC By-laws to convene as
promptly as practicable a meeting of its stockholders (the "GPC Stockholders
Meeting") to consider and vote upon the approval of this Agreement and the
Merger in accordance with the DGCL and the rules of the New York Stock Exchange
("NYSE"); except that no such meeting need be convened if the Board of Directors
of General Physics, in accordance with its fiduciary duties to General Physics'
stockholders, will not recommend approval by General Physics' stockholders of
this Agreement and the Merger. The parties agree that the GPC Stockholders
Meeting and the NPD Stockholders Meeting will be scheduled for the same day.

                  (c) Each of the Parent and General Physics will, through its
Board of Directors, subject to compliance with their respective fiduciary duties
to stockholders as advised by counsel, recommend to its stockholders approval of
such matters; provided, that (x) at any time prior to the NPD Stockholders
Meeting, the Board of Directors of the Parent, or (y) at any time prior to the
GPC Stockholders Meeting either the Special Committee or the Board of Directors
of General Physics, as the case may be, each in accordance with its fiduciary
duties to stockholders as advised by counsel may revoke, modify or qualify its
recommendation with respect to this Agreement and the Merger. As long as the
Board of Directors of General Physics and the Special Committee recommend
approval of this Agreement and the Merger (and such recommendation has not been
revoked, modified or qualified), at the GPC Stockholders Meeting the Parent
shall vote or cause to be voted in favor of approval and adoption of this
Agreement all of its shares of GPC Common Stock. Notwithstanding anything
contained in this Agreement to the contrary, any action by the Board of
Directors of the Parent or of General Physics permitted by this Section 5.2
shall not constitute a breach of this Agreement by the Parent or General Physics
as the case may be.

 

                                       30
<PAGE>   34
                                                    Agreement and Plan of Merger

         SECTION 5.3. LEGAL REQUIREMENTS TO MERGER. Each of the Parent, Newco
and General Physics will take, or cause to be taken, all reasonable actions
necessary to comply promptly with all legal requirements which may be imposed on
it with respect to the Merger and will promptly cooperate with and furnish
information to the other in connection with any such requirements imposed upon
any of them or any of their subsidiaries in connection with the Merger. Each of
the Parent, Newco and General Physics will, and will cause its subsidiaries to,
take all reasonable actions necessary to obtain (and will cooperate with each
other in obtaining) any consent, authorization, order or approval of, or any
exemption by, any Governmental Entity or other public or private third party,
required to be obtained by the Parent, Newco or General Physics or any of their
respective subsidiaries in connection with the Merger or the taking of any
action contemplated by this Agreement.

         SECTION 5.4. ACCESS TO INFORMATION. Upon reasonable notice, each of the
Parent, Newco and General Physics shall (and shall cause each of its
subsidiaries to) afford to the officers, employees, accountants, counsel,
financial and other representatives of the other, access, during normal business
hours during the period prior to the Effective Time, to all its properties,
books, contracts, commitments and records and, during such period, each of the
Parent, Newco and General Physics shall (and shall cause each of its
subsidiaries to) furnish promptly to the other (i) a copy of each report,
schedule, registration statement and other document filed or received by it
during such period pursuant to the requirements of the federal securities laws
and (ii) all other information concerning its business, properties and personnel
as the Parent, Newco or General Physics as the case may be, may reasonably
request.

         SECTION 5.5. BEST EFFORTS. Upon the terms and subject to the conditions
and other agreements set forth in this Agreement, each of the parties agrees to
use its best efforts to take, or cause to be taken, all actions, and to do, or
cause to be done, and to assist and cooperate with the other parties in doing,
all things necessary, proper or advisable to consummate and make effective, in
the most expeditious manner practicable, the Merger and the other transactions
contemplated by this Agreement.

         SECTION 5.6. CAPITAL STOCK.

                  (a) Prior to the Effective Time, the Parent shall use its
reasonable best efforts to repurchase all of the Vested Options so that each
holder of a Vested Option receives an amount in cash for each share of GPC
Common Stock then obtainable upon the exercise of such Vested Option equal to
$5.10 less the exercise price of such Vested Option as in effect immediately
prior to such repurchase. All such repurchased Vested Options shall thereupon be
canceled.

                  (b) Prior to the Effective Time, the Parent shall contribute
all or any portion of the Warrants to purchase shares of GPC Common Stock held
by it to the capital of General Physics, such Warrants to be thereupon
cancelled. Effective upon consummation of the Merger,

 

                                       31
<PAGE>   35
                                                    Agreement and Plan of Merger

the Parent shall assume, jointly with General Physics, the obligation to issue
shares of NPD Common Stock to holders of the remaining Warrants upon exercise
thereof pursuant to the terms thereof.

                  (c) Prior to the Effective Time, the Parent shall cause its
Subsidiaries which hold shares of GPC Common Stock (other than General Physics)
to dividend such shares to the Parent.

         SECTION 5.7. INDEMNIFICATION AND INSURANCE.

                  (a) From and after the Effective Time, the Surviving
Corporation shall indemnify and shall advance expenses to each person who is on
the date of this Agreement, or has been at any time prior to such date, or who
becomes prior to the Effective Time, an officer or director (the "Indemnified
Party") of General Physics or any of its subsidiaries against all losses,
claims, damages, liabilities, costs and expenses (including attorney's fees and
expenses), judgments, fines, losses, and amounts paid in settlement in
connection with any actual or threatened action, suit, claim, proceeding or
investigation (each a "Claim") to the extent that any such Claim is based on, or
arises out of, (i) the fact that such person is or was a director or officer of
General Physics or any of its subsidiaries at any time prior to the Effective
Time (or is or was serving as a member of the Special Committee at any time
prior to or at the Effective Time) or is or was serving at the request of
General Physics or any of its subsidiaries as a director or officer of another
corporation, partnership, joint venture, trust or other enterprise at any time
prior to the Effective Time, or (ii) this Agreement or any of the transactions
contemplated hereby, in each case to the extent that any such Claim pertains to
any matter or fact arising, existing, or occurring prior to or at the Effective
Time (or pertains to any act or function of the Special Committee relating to
this Agreement or the transactions contemplated hereby whether arising,
existing, or occurring prior to or at the Effective Time), regardless of whether
such Claim is asserted or claimed prior to, at or after the Effective Time (the
matters described in clauses (i) and (ii), the "Merger Matters"), to the fullest
extent permitted by Delaware law (including provisions relating to advancement
of expenses incurred in the defense of any Claim).

                  (b) The Parent and Newco agree that all limitations or
exculpation of liabilities existing in favor of an Indemnified Party as provided
in the GPC Charter and the GPC By-laws as in effect as of the date hereof shall
continue in full force and effect with respect to Merger Matters, without any
amendment thereto, to the extent such rights are consistent with the DGCL.

                  (c) The Surviving Corporation or the Parent shall cause to be
maintained, for a period of not less than six years from the Effective Time,
General Physics' current directors' and officers' liability insurance policy to
the extent that it provides coverage for events occurring prior to the Effective
Time and acts by or functions of the Special Committee prior to or at the

 

                                       32
<PAGE>   36
                                                    Agreement and Plan of Merger

Effective Time (the "D&O Insurance") for all present directors and officers of
General Physics or any subsidiary thereof; provided, however, that the Surviving
Corporation, in lieu of maintaining such existing D&O Insurance as provided
above, may cause no less favorable coverage to be provided under any policy
maintained for the benefit of the directors and officers of the Surviving
Corporation or any of its subsidiaries. If the existing D&O Insurance expires,
is terminated or canceled by the insurer during such six-year period, the
Surviving Corporation shall use its best efforts to obtain, in lieu of such D&O
Insurance, such comparable directors' and officers' liability insurance as can
be obtained for the remainder of such period on terms and conditions no less
advantageous than the existing D&O Insurance. To the extent that after giving
effect to the preceding sentence such comparable insurance is not commercially
available, with the consent of such persons, the Surviving Corporation shall
provide self-insurance.

         SECTION 5.8. PUBLIC ANNOUNCEMENTS. General Physics, on the one hand,
and the Parent, on the other hand, will consult with each other before issuing,
and provide each other the opportunity to review and comment upon, any press
release or other public statements with respect to the transactions contemplated
by this Agreement, including the Merger, and shall not issue any such press
release or make any such public statement without the consent of the other party
(such consent not to be unreasonably withheld), except as may be required by
applicable law, court process or by obligations pursuant to any listing
agreement with any national securities exchange.

         SECTION 5.9. NO SOLICITATION, ETC. General Physics shall not (nor will
it permit any of its officers, directors, agents or affiliates to) directly or
indirectly solicit, encourage (including by way of providing any non-public
information concerning General Physics or its subsidiaries to any person),
initiate or participate in any negotiations or discussions, or enter into (or
authorize) any agreement or agreement in principle, or announce any intention to
do any of the foregoing, with respect to any offer or proposal to acquire all or
a substantial part of its or its subsidiaries' business and properties or any of
its or its subsidiaries' capital stock whether by merger, purchase of assets,
tender offer or otherwise (all such actions being referred to herein as
"Acquisition Transactions"); provided, that nothing contained in this Section 
5.9 shall prohibit the Special Committee, to the extent required by its
fiduciary duties under applicable law as advised by counsel, from providing
information to, participating in negotiations or discussions with, entering into
any agreement or transaction with, or announcing any intention to do any of the
foregoing with, any party that makes an unsolicited inquiry or proposal relating
to an Acquisition Transaction. General Physics shall promptly notify the Parent
of the receipt of any inquiry or proposal which it may receive in respect of any
Acquisition Transaction, including the identity of the person making such
inquiry or proposal and, unless advised by counsel that there is a significant
risk that such action would constitute a breach of the Special Committee's
fiduciary duties, the material terms and conditions thereof and any changes
therein. The Parent agrees that the Special Committee may provide to any such
party that makes an unsolicited inquiry or proposal respecting an Acquisition
Transaction any change in the terms of this

 

                                       33
<PAGE>   37
                                                    Agreement and Plan of Merger

Agreement proposed by the Parent in response to such unsolicited inquiry or
proposal; provided, that the Special Committee has disclosed to the Parent the
identity of the person making such inquiry or proposal and the material terms
and conditions of such proposed Acquisition Transaction and any changes therein.

         SECTION 5.10. CONSENTS, APPROVALS AND FILINGS.

                  (a) The Parent, Newco and General Physics will make and cause
their respective subsidiaries to make all necessary filings, as soon as
practicable, including without limitation those required under the Securities
Act, the Exchange Act, state securities laws and state insurance laws in order
to facilitate prompt consummation of the Merger and the other transactions
contemplated by this Agreement. In addition, the Parent, Newco and General
Physics will each use their best efforts, and will cooperate fully with each
other (i) to comply as promptly as practicable with all governmental
requirements applicable to the Merger and the other transactions contemplated by
this Agreement and (ii) to obtain as promptly as practicable all necessary
permits, orders or other consents, approvals or authorizations of Governmental
Entities and consents or waivers of all third parties necessary or advisable for
the consummation of the Merger and the other transactions contemplated by this
Agreement. In connection with the foregoing, each of the Parent, Newco and
General Physics shall use its best efforts to provide such information and
communications to Governmental Entities as such Governmental Entities may
reasonably request.

                  (b) Each of the parties shall provide to the other party
copies of all applications and other documents in advance of filing or
submission of such applications and other documents to Governmental Entities in
connection with this Agreement.

         SECTION 5.11. NON-INTERFERENCE, ETC.

                  (a) Neither party hereto, nor any of their respective
subsidiaries, shall take any action, directly or indirectly, intended to, or
which such party reasonably believes would, result in (i) any of the other
party's representations and warranties set forth in this Agreement not being
true and correct in all material respects as of the Closing Date, (ii) any of
the other party's covenants not being performed or (iii) any of the conditions
to such party's obligations to consummate the transactions contemplated by this
Agreement not being satisfied.

                  (b) Each party shall give prompt notice to the other of (i)
any representation or warranty made by it contained in this Agreement that is
qualified as to materiality becoming untrue or inaccurate in any respect or any
such representation or warranty that is not so qualified becoming untrue or
inaccurate in any material respect or (ii) the failure by it to comply with or
satisfy in any material respect any covenant, condition or agreement to be
complied with or satisfied by it under this Agreement; provided, however, that
no such notification shall affect the

 

                                       34
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                                                    Agreement and Plan of Merger

representations, warranties, covenants or agreements of the parties or the
conditions to the obligations of the parties under this Agreement.

         SECTION 5.12. AFFILIATES. At least 30 days prior to the Closing Date,
General Physics and the Parent shall agree as to persons who are, at the time
the Merger is submitted for approval to the stockholders of General Physics,
"affiliates" of General Physics for purposes of Rule 145 under the Securities
Act. General Physics shall use its best efforts to cause each such person to
deliver to the Parent on or prior to the Closing Date a letter (an "Affiliate
Letter") to the effect that such person will not offer to sell, sell or
otherwise dispose of any shares of NPD Common Stock issued in the Merger, except
pursuant to an effective registration statement, in compliance with Rule 145, as
amended from time to time, or in a transaction which, in the opinion of legal
counsel satisfactory to the Parent, is exempt from the registration requirements
of the Securities Act. The Parent shall not be required to maintain the
effectiveness of the S-4 for the purpose of resale of the NPD Common Stock by
such affiliates and the certificates representing the NPD Common Stock received
by such affiliates in the Merger shall bear a customary legend regarding
applicable Securities Act restrictions and the provisions of this Section 5.12.

         SECTION 5.13. LISTING. The Parent shall use its best efforts to cause
the shares of NPD Common Stock to be issued to holders of GPC Common Stock
pursuant to this Agreement to be listed on the AMEX subject to official notice
of issuance, prior to the Effective Time.

         SECTION 5.14. BROKERS AND FINDERS.

                  (a) General Physics hereby represents and warrants that it and
its Subsidiaries have not engaged the services of any broker, finder, financial
advisor or other firm or person entitled to any broker's or finder's fee or any
other similar commission or fee in connection with any of the transactions
contemplated by this Agreement other than Oppenheimer & Co., Inc., whose fees
and expenses will be paid by General Physics, and General Physics agrees to
indemnify and hold harmless the Parent, Newco and their Subsidiaries (and
affiliates) from and against any and all claims, liabilities or obligations with
respect to any fees, commissions or expenses asserted by any such person who
claims to be entitled to such a fee or commission by reason of his, her or its
acting on behalf of General Physics or any of its subsidiaries.

                  (b) The Parent hereby represents and warrants that it and its
subsidiaries have not engaged the services of any agent, broker, finder,
financial advisor or other firm or person entitled to any broker's or finder's
fee or any other similar commission or fee in connection with any of the
transactions contemplated by this Agreement and the Parent agrees to indemnify
and hold harmless General Physics and its subsidiaries (and their affiliates)
from and against any and all claims, liabilities or obligations with respect to
any fees, commissions or expenses asserted by any such person who claims to be
entitled to such a fee or commission by reason of his, her or its acting on
behalf of the Parent or any of its subsidiaries.

 

                                       35
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                                                    Agreement and Plan of Merger

                                    ARTICLE 6

                              CONDITIONS PRECEDENT

         SECTION 6.1. CONDITIONS TO EACH PARTY'S OBLIGATION TO EFFECT THE
MERGER. The respective obligation of each party to effect the Merger is subject
to the satisfaction or waiver on or prior to the Closing Date of the following
conditions:

                  (a) Stockholder Approval. This Agreement and the Merger shall
have been approved and adopted by the affirmative vote of the stockholders of
the Parent and General Physics by the requisite vote in accordance with
applicable law and rules of the AMEX and the NYSE, respectively.

                  (b) Governmental and Regulatory Consents. All filings required
to be made prior to the Effective Time with, and all consents, approvals,
permits and authorizations required to be obtained prior to the Effective Time
from, Governmental Entities, in connection with the execution and delivery of
this Agreement and the consummation of the transactions contemplated hereby by
the parties hereto shall have been made or obtained (as the case may be), and
such consents, approvals, permits and authorizations shall be subject to no
conditions other than conditions that would not reasonably be expected to have a
NPD Material Adverse Effect or a GPC Material Adverse Effect.

                  (c) No Injunctions or Restraints. No temporary restraining
order, preliminary or permanent injunction or other order issued by any court of
competent jurisdiction or other legal restraint or prohibition preventing the
consummation of the Merger or any of the other transactions contemplated hereby
shall be in effect; provided, however, that the party invoking this condition
shall have used reasonable efforts to have any such order or injunction vacated.

                  (d) Form S-4. The S-4 shall have become effective under the
Securities Act and shall not be the subject of any stop order or proceedings by
the SEC seeking a stop order.

                  (e) Third-Party Consents. All consents and waivers of third
parties to the consummation of the Merger and the other transactions
contemplated hereby shall have been obtained, other than those which, if not
obtained, would not have a NPD Material Adverse Effect or a GPC Material Adverse
Effect.

 

                                       36
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                                                    Agreement and Plan of Merger

                  (f) Listing. The shares of NPD Common Stock issuable to
holders of GPC Common Stock pursuant to this Agreement shall have been listed on
the AMEX, subject to official notice of issuance.

         SECTION 6.2 CONDITIONS TO OBLIGATIONS OF GENERAL PHYSICS. The
obligations of General Physics to effect the Merger are further subject to the
following conditions:

                  (a) Representations and Warranties. The representations and
warranties of the Parent and Newco set forth in this Agreement that are
qualified as to materiality shall be true and correct and the representations
and warranties of the Parent and Newco set forth in this Agreement that are not
so qualified shall be true and correct in all material respects, in each case as
of the date of this Agreement and as of the Closing Date as though made on and
as of the Closing Date, except to the extent any such representation and
warranty speaks as of an earlier date, in which event such representation and
warranty shall be true and correct, or true and correct in all material
respects, as applicable, as of such date, and General Physics shall have
received a certificate signed on behalf of each of the Parent and Newco by the
chief executive officer and the chief financial officer of each of the Parent
and Newco to such effect.

                  (b) Performance of Obligations. The Parent and Newco each
shall have performed in all material respects all obligations required to be
performed by it under this Agreement at or prior to the Closing Date, and
General Physics shall have received a certificate signed on behalf of each of
the Parent and Newco by the chief executive officer and the chief financial
officer of each of the Parent and Newco to such effect.

                  (c) No Material Adverse Change. Since June 30, 1996, there
shall have been no NPD Material Adverse Change, and no event or condition which
individually or in the aggregate could reasonably be expected to result in a NPD
Material Adverse Change. For purposes of this Agreement, "NPD Material Adverse
Change" means any material adverse change in the business, assets, liabilities,
financial condition or results of operations of the Parent and its subsidiaries
taken as a whole.

                  (d) Fairness Opinion. The written opinion of Oppenheimer & Co,
Inc., dated as of the Closing Date, to the effect that the Merger Consideration
to be received by the holders of GPC Common Stock (other than National Patent)
is fair to such holders from a financial point of view, shall have been
delivered on the Closing Date.

                  (e) Opinion of Counsel. General Physics shall have received an
opinion of Morgan, Lewis & Bockius LLP, counsel to the Parent, addressed to
General Physics, dated as of the Closing Date, and in form reasonably
satisfactory to the parties hereto.

 

                                       37
<PAGE>   41
                                                    Agreement and Plan of Merger

                  (f) Third Party Consents. National Patent shall have received
consents and waivers of the third parties to the agreements listed on Schedule
3.2(a), to the extent necessary, under the terms of such agreements to the
consummation of the Merger and the other transactions contemplated hereby.

         SECTION 6.3. CONDITIONS TO OBLIGATIONS OF THE PARENT AND NEWCO. The
obligations of the Parent and Newco to effect the Merger are further subject to
the following conditions:

                  (a) Representations and Warranties. The representations and
warranties of General Physics set forth in this Agreement that are qualified as
to materiality shall be true and correct and the representations and warranties
of General Physics set forth in this Agreement that are not so qualified shall
be true and correct in all material respects, in each case as of the date of
this Agreement and as of the Closing Date as though made on and as of the
Closing Date, except to the extent any such representation and warranty speaks
as of an earlier date, in which event such representation and warranty shall be
true and correct, or true and correct in all material respects, as applicable,
as of such date, and the Parent shall have received a certificate signed on
behalf of General Physics by a duly authorized representative of General Physics
to such effect.

                  (b) Performance of Obligations. General Physics shall have
performed in all material respects all obligations required to be performed by
it under this Agreement at or prior to the Closing Date, and the Parent shall
have received a certificate signed on behalf of General Physics by a duly
authorized representative of General Physics to such effect.

                  (c) No Material Adverse Change. Since June 30, 1996, there
shall have been no GPC Material Adverse Change, and no event or condition which
individually or in the aggregate could reasonably be expected to result in a GPC
Material Adverse Change. For purposes of this Agreement, "GPC Material Adverse
Change" means any material adverse change in the business, financial condition
or results of operations of General Physics and its subsidiaries taken as a
whole.

                  (d) Fairness Opinion. The written opinion of Oppenheimer &
Co., Inc., dated as of the Closing Date hereof, to the effect that the Merger
Consideration to be received by the holders of GPC Common Stock (other than
National Patent) is fair to such holders from a financial point of view, shall
have been delivered on the Closing Date.

                  (e) Opinion of Counsel. The Parent shall have received an
opinion of Ballard Spahr Andrews & Ingersoll, counsel to General Physics,
addressed to the Parent and Newco, dated as of the Closing Date, and in form
reasonably satisfactory to the parties hereto.

                  (f) Third Party Consents. General Physics shall have received
consents and waivers of the third parties to the agreements listed on Schedule
3.1(c), to the extent necessary,

 

                                       38
<PAGE>   42
                                                    Agreement and Plan of Merger

under the terms of such agreements to the consummation of the Merger and the
other transactions contemplated hereby.

                                    ARTICLE 7

                        TERMINATION, AMENDMENT AND WAIVER

         SECTION 7.1. TERMINATION. This Agreement may be terminated and the
Merger may be abandoned at any time prior to the Effective Time (notwithstanding
any approval of this Agreement and the Merger by the stockholders of the Parent
and/or General Physics):

                  (a) by mutual written consent of General Physics and the
         Parent;

                  (b) by written notice by either General Physics or the Parent:

                           (i) if the Merger shall not have been consummated on
         or before April 30, 1997 (the "End Date"), unless the failure to
         consummate the Merger is the result of a willful and material breach of
         this Agreement by the party seeking to terminate this Agreement; or

                           (ii) if any Governmental Entity shall have issued an
         order, decree or ruling or taken any other action permanently
         enjoining, restraining or otherwise prohibiting the Merger and such
         order, decree, ruling or other action shall have become final and
         nonappealable;

                  (c) by the Parent, if there shall have been a material breach
of any material representation, warranty, covenant or agreement on the part of
General Physics such that the conditions set forth in Section 6.3(a) or 6.3(b)
would be incapable of being satisfied by the End Date (or as otherwise
extended); provided, however, that if any such breach is curable by General
Physics through the exercise of its reasonable best efforts and for so long as
General Physics shall be using its reasonable best efforts to cure such breach,
the Parent may not terminate this Agreement pursuant to this Section 7.1(c);

                  (d) by General Physics, if there shall have been any material
breach of any material representation, warranty, covenant or agreement on the
part of the Parent or Newco such that the conditions set forth in Section 6.2(a)
or 6.2(b) would be incapable of being satisfied by the End Date (or as otherwise
extended); provided, however, that if any such breach is curable by the Parent
or Newco through the exercise of its reasonable best efforts and for so long as
the Parent or Newco shall be using its reasonable best efforts to cure such
breach, General Physics may not terminate this Agreement pursuant to this
Section 7.1(d);

 

                                       39
<PAGE>   43
                                                    Agreement and Plan of Merger

                  (e) by the Parent, if the approval of the stockholders of the
Parent contemplated by this Agreement shall not have been obtained by reason of
the failure to obtain the required vote at the NPD Stockholders Meeting or any
adjournment thereof;

                  (f) by General Physics, (i) if the approval of the
stockholders of the Parent contemplated by this Agreement shall not have been
obtained by reason of the failure to obtain the required vote at the NPD
Stockholders Meeting or any adjournment thereof or (ii) if the approval of the
stockholders of General Physics contemplated by this Agreement shall not have
been obtained by reason of the failure to obtain the required vote at the GPC
Stockholders Meeting or any adjournment thereof (other than by reason of
termination of this Agreement by General Physics or by reason of a failure to
hold a GPC Stockholders Meeting as provided under Section 5.2(b));

                  (g) by the Parent, if, prior to the GPC Stockholders Meeting,
the Special Committee or the Board of Directors of General Physics shall have
withdrawn, or modified or changed in any manner adverse to the Parent or Newco
its approval or recommendation of this Agreement or the Merger or if such Board
will not convene a GPC Stockholders Meeting as provided by the exception to
Section 5.2(b);

                  (h) by General Physics, if, prior to the NPD Stockholders
Meeting, the Board of Directors of the Parent shall have withdrawn, or modified
or changed in any manner adverse to General Physics its approval or
recommendation of this Agreement or the Merger;

                  (i) by General Physics, if a person or group shall have made a
bona fide proposal for an Acquisition Transaction which the Special Committee
believes, and advises the Board of Directors of General Physics is superior to
the Merger from a financial point of view to the stockholders of General
Physics, provided that the provisions of Section 5.9 shall not have been
breached;

                  (j) unless General Physics has exercised the GPC Reduction
Option, by the Parent on a date no earlier than the close of business on the
second trading day after the trading day which is five trading days' prior to
the day when the GPC Stockholders Meeting and the NPD Stockholders Meeting are
first scheduled to occur (the "Test Date"), and no later than the close of
business on the fourth trading day after the Test Date, if, as of the Test Date
the Parent Stock Price is greater than $9.914; or

                  (k) unless the Parent has exercised the Parent Gross-Up
Option, by General Physics on a date no earlier than the close of business on
the second trading day after the Test Date and no later than the close of
business on the fourth trading day after the Test Date, if, on the Test Date,
the Parent Stock Price is less than $9.336.

 

                                       40
<PAGE>   44
                                                    Agreement and Plan of Merger

         This Agreement will terminate without action taken by any party hereto
if (i) on the Test Date the Parent Stock Price is less than $9.336, (ii) the
Parent has not exercised the Parent Gross-Up Option, and (iii) if, on a date no
earlier than the close of business on the second trading day after the Test Date
and no later than the close of business on the fourth trading day after the Test
Date, the Special Committee has withdrawn its approval or recommendation of this
Agreement or the Merger, such termination to be effective as of the date such
approval is withdrawn.

         Upon a termination of this Agreement pursuant to this Section 7.1, all
amounts, if any, payable pursuant to Section 7.2 shall be paid promptly in
accordance with the provisions of Section 7.2.

         SECTION 7.2. FEES AND EXPENSES UPON TERMINATION. In the event that this
Agreement is terminated by General Physics pursuant to Section 7.1(d) or Section
7.1(f)(i), the Parent agrees that it will reimburse General Physics for all
documented, reasonable out-of-pocket expenses incurred by General Physics in
connection with this Agreement, the Merger and the transactions contemplated by
this Agreement. In the event that (A) this Agreement is terminated by General
Physics pursuant to Section 7.1(i) or if a person or group shall have made a
bona fide proposal for an Acquisition Transaction, General Physics has failed to
terminate this Agreement pursuant to Section 7.1(i) and the Parent has
terminated this Agreement pursuant to Section 7.1(g), and (B) prior to the first
anniversary of the date hereof General Physics or any of its Subsidiaries enters
into or authorizes any agreement or agreement in principle with any person other
than the Parent or its stockholders as a group to sell, lease or otherwise
transfer all or a substantial part of its or its subsidiaries' business and
properties or any of its or its subsidiaries' capital stock (excluding capital
stock held by the Parent) whether by merger, purchase of assets, tender offer or
otherwise, then General Physics agrees that it will thereupon reimburse the
Parent for all documented, reasonable out-of-pocket expenses incurred by the
Parent in connection with this Agreement, the Merger and the transactions
contemplated by this Agreement. Any such payment under this Section 7.2 shall be
as liquidated damages and not as a penalty, shall be in lieu of any other
remedies (other than in the circumstances contemplated by the proviso to 
Section 7.3), and shall be made by wire transfer of immediately available 
funds promptly after receipt of appropriate documentation.

         SECTION 7.3. EFFECT OF TERMINATION. In the event of termination of this
Agreement by either the Parent or General Physics as provided in Section 7.1,
written notice thereof shall promptly be given to the other party specifying the
provision hereof pursuant to which such termination is made, and this Agreement
shall forthwith become void and have no effect, without any liability or
obligation on the part of the Parent, Newco or General Physics other than
Section 5.14, Article 7 and Article 9; provided, however, that nothing contained
in this Section or elsewhere in this Agreement shall relieve or limit upon
termination of this Agreement any party from any liability resulting from any
willful and material breach of any of its representations, warranties, covenants
or agreements set forth in this Agreement.

 

                                       41
<PAGE>   45
                                                    Agreement and Plan of Merger

         SECTION 7.4. EXTENSION; WAIVER. At any time prior to the Effective
Time, the parties may (a) extend the time for the performance of any of the
obligations or other acts of the other parties, (b) waive any inaccuracies in
the representations and warranties of the other parties contained in this
Agreement or in any document delivered pursuant to this Agreement or (c) subject
to Section 9.4, waive compliance with any of the agreements or conditions of the
other parties contained in this Agreement. Any agreement on the part of a party
to any such extension or waiver shall be valid only if set forth in an
instrument in writing signed on behalf of such party. The failure of any party
to this Agreement to assert any of its rights under this Agreement or otherwise
shall not constitute a waiver of such rights.

         SECTION 7.5. PROCEDURE FOR TERMINATION, AMENDMENT, EXTENSION OR
                      WAIVER; ROLE OF THE SPECIAL COMMITTEE UP TO THE EFFECTIVE
                      TIME.

                  (a) A termination of this Agreement pursuant to Section 7.1,
an amendment of this Agreement pursuant to Section 9.4 or an extension or waiver
pursuant to Section 7.4 shall, in order to be effective, require in the case of
General Physics, action by the Special Committee or the duly authorized designee
of the Special Committee and in the case of the Parent, action by its Board of
Directors or the duly authorized designee of its Board of Directors.

                  (b) The Special Committee (and the directors of General
Physics who serve on the Special Committee) shall continue to function and act
in such capacity from the date of this Agreement until the Effective Time with
respect to all matters relating to General Physics in connection with this
Agreement and the transactions contemplated hereby.

                                    ARTICLE 8

                                   DEFINITIONS

         SECTION 8.1. CERTAIN DEFINED TERMS. The following capitalized terms,
when used in this Agreement, have the respective meanings set forth below (such
definitions to be equally applicable to both singular and plural forms of the
terms defined).

         "Affiliate" or "affiliate" of any person means another person that
directly or indirectly, through one or more intermediaries, controls, is
controlled by, or is under common control with, such first person; provided,
that with respect to the Parent or Newco, "affiliate" shall not include General
Physics or its subsidiaries and, with respect to General Physics, the term
"affiliate" shall not include the Parent or its Subsidiaries;

         "Code" means the Internal Revenue Code of 1986, as amended.

 

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<PAGE>   46
                                                    Agreement and Plan of Merger

         "Convertible Debentures" means collectively the 12% Subordinated
Debentures of the Parent due 1997, the 5% Convertible Bonds of the Parent due
1999 and the 7% Convertible Notes of American Drug Company due 2001.

          "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.

          "GAAP" means United States generally accepted accounting principles.

          "Governmental Entity" means any court, administrative agency or
commission or other governmental authority or instrumentality, domestic, local,
state, federal or foreign.

         "GPC Material Adverse Effect" means any circumstance relating to,
change in, or effect on General Physics and its Subsidiaries taken as a whole
that, individually or in the aggregate with any other circumstances relating to,
changes in, or effects on, any of General Physics or its Subsidiaries is
materially adverse to the business, assets, liabilities, financial condition, or
results of operations of General Physics and its Subsidiaries taken as a whole.

          "Lien" means any lien, pledge, security interest or other encumbrance
on assets.

          "NPD Material Adverse Effect" means any circumstance relating to,
change in, or effect on the Parent and its Subsidiaries taken as a whole that,
individually or in the aggregate with any other circumstances relating to,
changes in, or effects on, any of the Parent or its Subsidiaries is materially
adverse to the business, assets, liabilities, financial condition, or results of
operations of the Parent and its Subsidiaries taken as a whole.

          "Parent Stock Price" means the amount which is equal to the overall
average of the high, low, opening and closing sales prices (averaged for each
trading day) of NPD Common Stock on the American Stock Exchange Composite Tape
on each of the ten consecutive trading days immediately preceding the trading
day which is five trading days prior to the day when the GPC Stockholders
Meeting and the NPD Stockholders Meeting occurs.

          "Person" or "person" means an individual, corporation, partnership,
joint venture, association, trust, unincorporated organization or other entity.

          "SEC" means the Securities and Exchange Commission.

          "Securities Act" means the Securities Act of 1933, as amended.

 

                                       43
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                                                    Agreement and Plan of Merger

         "Subsidiary" means, with respect to any Person, any corporation,
partnership, association or other business entity of which (i) if a corporation,
a majority of the total voting power of shares of stock entitled (without regard
to the occurrence of any contingency) to vote in the election of directors,
managers or trustees thereof is at the time owned or controlled, directly or
indirectly, by that Person or one or more of the other Subsidiaries of that
Person or a combination thereof, or (ii) if a partnership, association or other
business entity, a majority of the partnership or other similar ownership
interest thereof is at the time owned or controlled, directly or indirectly, by
any Person or one or more Subsidiaries of that Person or a combination thereof;
provided, that General Physics and each of General Physics' subsidiaries shall
not constitute a "Subsidiary" of the Parent or any of its Subsidiaries. For
purposes hereof, a Person or Persons shall be deemed to have a majority
ownership interest in a partnership, association or other business entity if
such Person or Persons shall be allocated a majority of partnership, association
or other business entity gains or losses or shall be or control the managing
director or general partner of such partnership, association or other business
entity.

         "Taxes" shall include all federal, state, local and foreign income,
property, sales, excise, employment, payroll, withholding and other taxes,
tariffs or governmental charges of any nature, together with any interest,
penalties and additions to tax.

         "Warrants" means the Warrants to purchase common stock of General
Physics issued pursuant to the Warrant Agreement dated as of August 31, 1994
between General Physics and Midlantic National Bank as Warrant Agent and the
Warrants to purchase common stock of General Physics issued pursuant to the
Warrant Agreement dated as of August 31, 1994 between General Physics and
Midlantic National Bank as Warrant Agent.

         SECTION 8.2. CERTAIN RULES OF CONSTRUCTION. When a reference is made in
this Agreement to a Section , Exhibit or Schedule, such reference shall be to a
Section of, or an Exhibit or Schedule to, this Agreement unless otherwise
indicated. The table of contents and headings contained in this Agreement are
for reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement. Whenever the words "include", "includes" or
"including" are used in this Agreement, they shall be deemed to be followed by
the words "without limitation".



                                       44
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                                                    Agreement and Plan of Merger

         SECTION 8.3. TABLE OF DEFINED TERMS DEFINED IN THE TEXT OF THE
                      AGREEMENT.

                Term                                              Section 
                ----                                              -------
Acquisition Transactions......................................    5.9
Affiliate Letter..............................................    5.12
AMEX..........................................................    5.2(a)
Assumed Options...............................................    2.1(c)
Class B Stock.................................................    3.2(b)
Claim.........................................................    5.7(a)
Closing.......................................................    1.2
Closing Date..................................................    1.2
Controlled Company............................................    3.1(k)
Converted Shares..............................................    2.2(d)
D&O Insurance.................................................    5.7(c)
Delaware Court................................................    9.8
Delaware Secretary of State...................................    1.3
DGCL..........................................................    1.1
Effective Time................................................    1.3
End Date......................................................    7.1(b)
Exchange Agent................................................    2.2(a)
Exchange Fund.................................................    2.2(a)
General Physics...............................................    preamble
GPC By-laws...................................................    1.5(c)
GPC Charter...................................................    1.5(a)
GPC Charter Amendment.........................................    1.5(b)
GPC Common Stock..............................................    2.1
GPC Material Adverse Change...................................    6.3(c)
GPC Permits...................................................    3.1(f)
GPC Plan......................................................    3.1(k)
GPC Preferred Stock...........................................    3.1(b)
GPC Proxy Statement...........................................    3.1(c)
GPC Reduction Option..........................................    2.1(b)
GPC Reports...................................................    3.1(d)
GPC SEC Documents.............................................    3.1(d)
GPC Stockholders Meeting......................................    5.2(b)
GPC Stock Plans...............................................    3.1(b)
Indemnified Party.............................................    5.7(a)
Merger........................................................    preamble
Merger Consideration..........................................    2.1(b)



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                                                    Agreement and Plan of Merger

Merger Matters................................................    5.8(a)
NPD Common Stock..............................................    2.1(a)
NPD Controlled Company........................................    3.2(k)
NPD Material Adverse Change...................................    6.2(c)
NPD Permits...................................................    3.2(f)
NPD Plan......................................................    3.2(k)
NPD Proxy Statement...........................................    3.2(c)
NPD Reports...................................................    3.2(d)
NPD SEC Documents.............................................    3.2(d)
NPD Stockholders Meeting......................................    5.2(a)
Newco.........................................................    preamble
NYSE..........................................................    5.2(b)
Options.......................................................    2.1(c)
Parent........................................................    preamble
Parent Gross-Up Option........................................    2.1(b)
Parent Stock Plans............................................    3.2(b)
Proxy Statement...............................................    3.1(c)
Relevant Group................................................    3.1(p)
S-4...........................................................    3.1(e)
Special Committee.............................................    preamble
State Takeover Approvals......................................    3.1(c)
Stock Consideration...........................................    2.1(b)
Surviving Corporation ........................................    1.1
Test Date.....................................................    7.1(j)
Vested Options................................................    2.1(c)
Violation.....................................................    3.1(c)
Voting Debt...................................................    3.1(b)

                                    ARTICLE 9

                               GENERAL PROVISIONS

         SECTION 9.1. NONSURVIVAL OF REPRESENTATIONS AND WARRANTIES. None of the
representations and warranties in this Agreement (including the exhibits and
schedules hereto) or in any instrument delivered pursuant to this Agreement
shall survive the Effective Time. This Section 9.1 shall not limit any covenant
or agreement of the parties which by its terms contemplates performance after
the Effective Time, including without limitation Section 5.7, Section 5.8 and
the Affiliate Letters delivered pursuant to Section 5.12.



                                       46
<PAGE>   50
                                                    Agreement and Plan of Merger

         SECTION 9.2. FEES AND EXPENSES. Except as set forth in Section 7.2 and
except for expenses incurred in printing the GPC Proxy Statement, the NPD Proxy
Statement and the S-4, as well as the filing fees relating thereto, which costs
shall be shared equally by the Parent and General Physics whether or not the
Merger is consummated, each party hereto shall pay its own fees and expenses
incident to preparing for, entering into and carrying out this Agreement and the
consummation of the transactions contemplated hereby.

         SECTION 9.3. NOTICES. All notices, requests, claims, demands and other
communications under this Agreement shall be in writing and shall be deemed
given if delivered personally or sent by facsimile (with confirmation of
receipt) or overnight courier (providing proof of delivery) to the parties at
the following addresses (or at such other address for a party as shall be
specified by like notice):

                  (a)      if to General Physics, to

                           General Physics Corporation
                           6700 Alexander Bell Drive
                           Columbia, Maryland  21046
                           Attention:  General Counsel
                           Telephone No.:  (410) 290-2300
                           Facsimile No.:  (410) 290-2646

                           with copy to:

                           Richards, Layton & Finger
                           One Rodney Square
                           Wilmington, Delaware  19801
                           Attention:  Jesse Finkelstein
                           Telephone No.:  (302) 651-7754
                           Facsimile No.:  (302) 658-6548

                  (b)      If to Parent or to Newco, to

                           National Patent Development Corporation
                           9 West 57th Street
                           New York, New York 10019
                           Attention:  General Counsel
                           Telephone No.:  (212) 230-9513
                           Facsimile No.:  (212) 230-9545

 

                                       47
<PAGE>   51
                                                    Agreement and Plan of Merger

                           with a copy to:

                           Morgan, Lewis & Bockius LLP
                           101 Park Avenue
                           New York, New York  10178-0060
                           Attention:  David W. Pollak
                           Telephone No.:  (212) 309-6058
                           Facsimile No.:  (212) 309-6273

         SECTION 9.4. AMENDMENT. Subject to the applicable provisions of the
DGCL, at any time prior to the Effective Time, the parties hereto may amend this
Agreement; provided, however, that after approval of the Merger by the
stockholders of General Physics and/or the Parent, no amendment shall be made
that by law requires the approval of General Physics' stockholders or the
Parent's stockholders, as the case may be, without the approval of such
stockholders. This Agreement may not be amended except by an instrument in
writing signed on behalf of each of the parties.

         SECTION 9.5. ENTIRE AGREEMENT; THIRD-PARTY BENEFICIARIES. This
Agreement and the other agreements referred to herein constitute the entire
agreement, and supersede all prior agreements and understandings, both written
and oral, among the parties with respect to the subject matter of this
Agreement. This Agreement is not intended to confer upon any person other than
the parties hereto any rights or remedies.

         SECTION 9.6. GOVERNING LAW. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of Delaware (without regard
to any conflicts of law rules thereof which might apply the laws of any other
jurisdiction).

         SECTION 9.7. ASSIGNMENT. Neither this Agreement nor any of the rights,
interests or obligations under this Agreement shall be assigned, in whole or in
part, by operation of law or otherwise by any of the parties without the prior
written consent of the other parties, and any such assignment that is not
consented to shall be null and void; provided, that Newco may assign, in its
sole discretion, any or all of its rights, interests and obligations hereunder
to the Parent or to any wholly-owned Subsidiary of the Parent. Subject to the
preceding sentence, this Agreement will be binding upon, inure to the benefit
of, and be enforceable by, the parties and their respective successors and
assigns.

         SECTION 9.8. ENFORCEMENT. The parties agree that irreparable damage
would occur in the event that any of the provisions of this Agreement were not
performed in accordance with their specific terms or were otherwise breached. It
is accordingly agreed that the parties shall be entitled to an injunction or
injunctions to prevent breaches of this Agreement and to enforce specifically
the terms and provisions of this Agreement in any court of the United States
located

 

                                       48
<PAGE>   52
                                                    Agreement and Plan of Merger

in the State of Delaware or any state court sitting in the City of Wilmington,
Delaware (any such federal or state court, a "Delaware Court"), in addition to
any other remedy to which they are entitled at law or in equity. In addition,
each of the parties hereto (a) consents to submit itself to the personal
jurisdiction of any Delaware Court in the event any dispute arises out of this
Agreement or any of the transactions contemplated by this Agreement and (b)
agrees that it will not attempt to deny or defeat such personal jurisdiction or
venue by motion or other request for leave from any such Delaware Court.

         SECTION 9.9. SEVERABILITY. Whenever possible, each provision or portion
of any provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

         SECTION 9.10. COUNTERPARTS. This Agreement may be executed in one or
more counterparts, all of which shall be considered one and the same agreement,
and shall become effective when one or more counterparts have been signed by
each of the parties and delivered to the other parties, it being understood that
all parties need not sign the same counterpart.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

 

                                       49
<PAGE>   53
                                                    Agreement and Plan of Merger

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be signed by their respective officers or other representatives
thereunto duly authorized, all as of the date first written above.

                                GENERAL PHYSICS CORPORATION

                                By:/s/John C. McAuliffe
                                   --------------------------------------------
                                    Title: Executive Vice President

                                NATIONAL PATENT DEVELOPMENT

                                    CORPORATION

                                By:/s/Jerome I. Feldman
                                   --------------------------------------------
                                    Title: President and Chief Executive Officer

                                GPX ACQUISITION INC.

                                By:/s/Scott N. Greenberg
                                   --------------------------------------------
                                    Title: Vice President

                                       50
<PAGE>   54
                                Schedule 3.1(c)



The Merger requires the approval/waiver of Fleet Bank, N.A., as successor lender
to NatWest Bank N.A. under the Credit Agreement dated as of April 7, 1995, among
NatWest Bank N.A., as lender, and National Patent Development Corporation,
General Physics Corporation, Inventory Management Corporation, GP Environmental
Services, Inc. and General Physics Federal Systems, Inc., as borrowers.






<PAGE>   55
                                Schedule 3.2(c)
                                   Authority

1.      Credit Agreement, dated as of April 7, 1995, among National Patent
Development Corporation; General Physics Corporation; Inventory Management
Corporation; GP Environmental Services, Inc.; and GPS Technologies, Inc.
Federal Systems Group, as Borrowers, and NatWest Bank N.A., as Bank.

2.      Loan Agreement, dated as of April 29, 1993, by and among Five Star
Group, Inc., the Banks signatory hereto, and National Westminster Bank NJ, as
agent for such banks, as amended on February 28, 1994, July 1994, October 23,
1995, June 28, 1996, July 31, 1996, August 30, 1996, and September 30, 1996.

3.      Loan Agreement dated as of April 29, 1993, by and among MXL Industries,
Inc., the Banks signatory hereto, and National Westminster Bank NJ, as agent
for such banks, as amended on October 23, 1995 and September 30, 1996.


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