CENTREX INC
10SB12G, EX-8.3, 2000-11-27
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                          AGREEMENT AND PLAN OF MERGER

     This  Agreement  and Plan of Merger  ("Agreement")  is entered  into by and
among  CENTREX,   INC.,  an  Oklahoma   corporation   ("CENTREX"),   SAFE  WATER
TECHNOLOGIES,  INC., a Florida  corporation  ("SWT"),  and UTEK  CORPORATION,  a
Delaware corporation ("UTEK").

     WHEREAS, UTEK is the majority shareholder of SWT; and

     WHEREAS,  Dr. Luis Garcia-Rubio is the inventor and principal  investigator
who has discovered and has developed an on-line  spectroscopic and turbidimetric
technique  for  detecting,  classifying  and  counting  micororganisms,  such as
cryptosporidium   and  giardia,  in  water  solutions  and  related  technology,
processes  and  procedures   ("Invention")  covered  by  US  Patent  Application
described  in  Schedule  1, as to which  formal  notice  of  allowance  has been
received but not yet published ("Patent Applications"); and

     WHEREAS,  the  University  of South  Florida  ("USF")  initially  owned the
Invention and Patent Applications,  but USF has assigned all its rights,  titles
and  interests in the  Invention to the  University  of South  Florida  Research
Foundation ("USFRF"); and

     WHEREAS,   SWT  has  acquired  an  exclusive  worldwide  License  Agreement
("License")  with USFRF,  a copy of which is attached  hereto as an exhibit,  to
practice  patents  covering  the  Invention  and  to  manufacture,   market  and
commercialize products covered by the Invention; and

     WHEREAS,  the parties desire to provide for the terms and  conditions  upon
which SWT will merge into CENTREX in a statutory merger ("Merger") in accordance
with 18  Oklahoma  Statutes,  Section  1082  of the  Oklahoma  General  Business
Corporation Act ("Oklahoma  Act") and Section 607.1107 of the Corporation Law of
Florida  ("Florida Act"),  upon consummation of which the assets and business of
SWT will be owned by CENTREX, all liabilities and obligations of SWT will become
the  liabilities  and  obligations  of CENTREX,  and all issued and  outstanding
shares of capital  stock of SWT will be  exchanged  for common stock of CENTREX;
and

     WHEREAS,  for federal  income tax purposes,  it is intended that the Merger
qualify as a tax-free  reorganization within the meaning of Section 368(a)(l)(A)
of the Internal Revenue Code of 1986, as amended ("Code").

     NOW,  THEREFORE,  in  consideration  of the premises and for other good and
valuable  consideration,  the  receipt,  adequacy and  sufficiency  of which are
hereby acknowledged, the parties agree as follows:

                                                  Sequentially numbered page 170
<PAGE>


                                    ARTICLE I
                                   THE MERGER

     1.01. The Merger

     (a) Agreement to Merge.  Subject to filing  evidence of the Merger with the
Secretary of State of Oklahoma,  the  jurisdiction of the Surviving  Corporation
and the terms and  conditions  of this  Agreement,  at the  Effective  Time,  as
defined below,  SWT shall be merged with and into CENTREX in accordance with the
provisions  of this  Agreement  and the Oklahoma  Act;  the  separate  corporate
existence  of SWT shall  cease;  and CENTREX  shall  continue  as the  surviving
corporation   ("Surviving    Corporation").    The   constituent    corporations
("Constituent  Corporations") to the Merger are CENTREX and SWT. The name of the
Surviving  Corporation,  CENTREX,  INC.,  shall not be  changed by reason of the
Merger.

     (b) Effective Time. The Merger shall become  effective  ("Effective  Time")
upon filing of a  Certificate  of Merger  substantially  in the form attached as
Exhibit A ("Certificate  of Merger") with the Secretary of State of the State of
Oklahoma in accordance with applicable provisions of the Oklahoma Act.

     (c) Appointment of Service Agent.  CENTREX hereby irrevocably  appoints the
Secretary  of State of the State of  Florida  as its agent to accept  process in
Florida  in  any  proceeding  for  the  enforcement  of  any  obligation  of any
Constituent  Corporation  in  Florida  as  well as for  the  enforcement  of any
obligation of the Surviving Corporation arising from or by reason of the Merger,
including  any suit or other  proceeding  to  enforce  appraisal  rights  of any
shareholder of SWT.  CENTREX  designates  that all such process  received by the
Secretary of State of Florida shall be sent to CENTREX at 8908 South Yale, Suite
409, Tulsa, Oklahoma 74137-3545.

     (d) Effect of the  Merger.  At the  Effective  Time,  all  rights,  powers,
privileges,  franchises,  licenses and permits of the Constituent  Corporations,
and all  property,  real,  personal and mixed,  shall be vested in the Surviving
Corporation;  and all  debts,  duties,  liabilities  and  claims of every  kind,
character  and  description  of the  Constituent  Corporations  shall be  debts,
duties,  liabilities of and claims against of the Surviving  Corporation and may
be enforced  against  the  Surviving  Corporation  to the same extent as if such
debts,  duties,  liabilities  of and  claims  against  had been  incurred  by it
originally.  All rights of creditors  of the  Constituent  Corporations  and all
liens upon property of any Constituent Corporation shall be preserved unimpaired
and shall not be altered in any way by reason of the Merger.

     1.02.  Conversion of Stock At the  Effective  Time, by virtue of the Merger
and  without  any  action  on the part of the  shareholders  of the  Constituent
Corporations:



                                       -2-

                                                  Sequentially numbered page 171
<PAGE>


     (i) Each of the 950,000  shares of SWT that are issued and  outstanding  at
the  Effective  Time shall be converted  into 1 share (or 950,000  shares in the
aggregate) of common stock of the Surviving Corporation, as follows:

          SWT Shareholder                     No. of Shares
          ______________                      _____________
          UTEK                                684,000 shares
          USFRF                               190,000 shares
          Ms. Flo Hassell                     76,000 shares

     (ii) All  issued  and  outstanding  options,  warrants  or other  rights to
acquire any capital  stock of SWT at the  Effective  Time shall by reason of the
Merger  and  without  action on the part of the  holders  of any such  rights be
automatically canceled for all purposes; and

     (iii) Each share of common stock of CENTREX  issued and  outstanding at the
Effective Time and each right to receive a share of common stock of CENTREX upon
the  satisfaction  of any  conditions  outstanding  at the Effective  Time shall
remain issued and  outstanding and shall not be effected in any manner by reason
of the Merger.

     1.03. Effect of Merger.

     (a) Rights in SWT Cease.  At and after the  Effective  Time,  the holder of
each  certificate  of common  stock of SWT shall  cease to have any  rights as a
shareholder  of SWT. All  dividends or other  distributions  with respect to SWT
common stock prior to the Effective Time shall be payable to the shareholders of
SWT without  interest upon  surrender of  certificates  representing  SWT common
stock.

     (b) Closure of SWT Stock  Records.  From and after the Effective  Time, the
stock  transfer  books of SWT shall be  closed,  and there  shall be no  further
registration of stock transfers on the records of SWT.

     1.04.  Certificate  of  Incorporation  of the  Surviving  Corporation.  The
Certificate of Incorporation of the Surviving  Corporation  shall not be changed
by reason of the Merger.

     1.05.  Bylaws of the  Surviving  Corporation.  The Bylaws of the  Surviving
Corporation shall not be changed by reason of the Merger.

     1.06.  Directors  of  the  Surviving  Corporation.  The  directors  of  the
Surviving Corporation  immediately after the Effective Time shall be the persons
named in Exhibit B until each of their respective successors is duly elected and
qualified.

     1.07. Officers of the Surviving Corporation.  The officers of the Surviving
Corporation  immediately after the Effective Time shall be the persons set forth
in Exhibit B until  each of their  respective  successors  is duly  elected  and
qualified.

                                       -3-

                                                  Sequentially numbered page 172
<PAGE>


     1.08. Closing. The Closing of the Merger shall take place at the offices of
Frederick K. Slicker,  8908 S. Yale,  Suite 410, Tulsa,  Oklahoma  74137-3545 at
5:00 p.m. local time upon execution of the Agreement.

                                   ARTICLE II
                         REPRESENTATIONS AND WARRANTIES

     2.01. General  Representations and Warranties of SWT and UTEK. SWT and UTEK
represent  and  warrant to CENTREX  that the facts set forth  below are true and
correct:

     (a) Organization. SWT is a corporation duly organized, validly existing and
in good  standing  under the laws of the State of  Delaware,  is qualified to do
business  as a  foreign  corporation  in each  other  jurisdiction  in which the
conduct  of  its  business  or the  ownership  of its  properties  require  such
qualification,  and has all  requisite  power and  authority  to  conduct  SWT's
business and operate properties.

     (b) Authorization.  The execution of this Agreement and the consummation of
the  Merger  and the  other  transactions  contemplated  hereby  have  been duly
authorized by the Board of Directors and Shareholders of SWT; no other corporate
action on its part is necessary  in order to execute,  deliver,  consummate  and
perform its obligations hereunder; and SWT has all requisite corporate and other
authority to execute and deliver this Agreement and consummate the  transactions
contemplated hereby.

     (c)  Capitalization.  The authorized  capital of SWT consists of 10,000,000
shares of common stock,  par value $.001 per share;  at the date hereof  950,000
shares  of its  common  stock  are  issued  and  outstanding  and  owned  by the
shareholders  listed in  Paragraph  1.02  above,  and no shares were held in its
treasury.  All issued and  outstanding  shares of common  stock of SWT have been
duly and validly  issued and are fully paid and  non-assessable  shares and have
not been issued in  violation  of any  preemptive  or other  rights of any other
person or any  applicable  laws.  There are no  outstanding  options,  warrants,
commitments,  calls or other  rights  or  agreements  requiring  it to issue any
shares of SWT common stock or securities  convertible  into shares of the common
stock of SWT to anyone for any reason whatsoever.

     (d) Binding Effect. The execution,  delivery,  performance and consummation
of the Merger and the  transactions  contemplated  hereby  will not  violate any
obligation to which SWT is a party and will not create a default hereunder;  and
this  Agreement  constitutes  a legal,  valid  and  binding  obligation  of SWT,
enforceable  in  accordance  with its terms,  except as the  enforcement  may be
limited  by  bankruptcy,  insolvency,  moratorium,  or  similar  laws  affecting
creditor's  rights  generally  and by the  availability  of  injunctive  relief,
specific performance or other equitable remedies.



                                       -4-

                                                  Sequentially numbered page 173
<PAGE>


     (e) Litigation Relating to this Agreement.  There are no suits,  actions or
proceedings  pending or to the knowledge of SWT or UTEK threatened which seek to
enjoin the Merger or the  transactions  contemplated by this Agreement or which,
if adversely  decided,  would have a materially  adverse effect on the business,
results of operations,  assets, prospects, the Patent Applications, the License,
the results of the operations of SWT.

     (f) No Conflicting  Agreements.  Neither the execution and delivery of this
Agreement nor the fulfillment of or compliance by SWT and UTEK with the terms or
provisions hereof will result in a breach of the terms, conditions or provisions
of, or  constitute a default  under,  or result in a violation of, the corporate
charter or bylaws of SWT, the Patent  Applications,  the  License,  the Research
Agreement, or any agreement,  contract, instrument, order, judgment or decree to
which either UTEK or SWT is a party or by which UTEK or SWT or any of its assets
is bound,  or violate any provision of any applicable law, rule or regulation or
any order,  decree, writ or injunction of any court or governmental entity which
materially affects its assets or business.

     (g) Consents. No consent from or approval of any court, governmental entity
or any other person is necessary in  connection  with  execution and delivery of
this Agreement by SWT or UTEK or  performance of the  obligations of SWT or UTEK
hereunder or under any other agreement to which SWT or UTEK is a party;  and the
consummation of the transactions contemplated by this Agreement will not require
the  approval of any entity or person or prevent the  termination  of the Patent
Applications,  the License, or any other material right,  privilege,  license or
agreement relating to SWT or its assets or business.

     (h) Title to Assets.  SWT will at Closing have good and marketable title to
its assets  (tangible  and  intangible),  free and clear of all  liens,  claims,
charges,  mortgages,  options,  restrictions,   security  agreements  and  other
encumbrances of every kind or nature whatsoever, including the duly executed and
delivered License.


     (i) The Patent Applications and the License.

          (i)  To the knowledge of UTEK and SWT, the Patent  Applications listed
               in  Schedule  1 are valid and are in full force and effect to the
               extent the Patents  have been  granted;  the Patent  Applications
               which  are  pending  are  being  prosecuted  in good  faith  with
               diligence;  USFRF has received  formal notice of  acceptance  but
               patents  have not yet been  published  or  formally  issued;  and
               neither  UTEK nor SWT has any reason to believe that patents will
               not be issued pursuant to the Patent Applications; and

          (ii) To the knowledge of UTEK and SWT, the Invention does not and will
               not infringe the  intellectual  or other rights of another.  This
               representation  and warranty is not a representation  or warranty
               that



                                       -5-

                                                  Sequentially numbered page 174
<PAGE>


               there are no infringing intellectual rights of any other but is a
               representation  and  warranty  only that neither SWT nor UTEK has
               any knowledge thereof; and CENTREX acknowledges that neither UTEK
               nor SWT has conducted an independent  investigation  to determine
               whether the Invention  infringes the rights of any other party or
               that the Invention itself is marketable; and

          (iii)The  Invention  is owned by USFRF,  which has all  right,  power,
               authority,  ownership  and  entitlement  to file,  prosecute  and
               maintain in effect the Patent  Applications  with  respect to the
               Invention listed in Schedule 1 hereto; and

          (iv) Dr. Luis Garcia-Rubio is the only inventor of the Invention,  and
               he has assigned all of his rights,  titles,  and interests in the
               Invention to USFRF; and

          (v)  The  License is in full  force and  effect  and is legal,  valid,
               binding and enforceable in accordance with its terms.

     (j)  Liabilities  of SWT. SWT has no assets,  no  liabilities  of any kind,
character or description  except those created by the License,  and except for $
in actual out-of-pocket expenses incurred in the Patent Applications.

     (k) Condition of Tangible  Assets.  All of the tangible  assets of SWT have
been  operated  in  accordance  with  customary  operating  practices  generally
acceptable  in its  industry to which and have been  maintained  and are in good
working  order and repair in the ordinary  course of  business,  subject only to
reasonable and ordinary wear and tear.

     (1)  Financial  Statements.  The  unaudited  financial  statements  of  SWT
attached as Schedule 2.01(1) as of the Closing will present fairly its financial
position  and the  results of its  operations  on the dates and for the  periods
shown therein; provided,  however, that interim financial statements are subject
to customary year-end adjustments and accruals that, in the aggregate,  will not
have a material adverse effect on the overall financial  condition or results of
its  operations.  SWT has not  engaged  in any  business  not  reflected  in its
financial statements.  There have been no material adverse changes in the nature
of its business, prospects, the value of assets or the financial condition since
the date of its financial  statements.  There are no outstanding  obligations or
liabilities  of SWT  except  as  specifically  set  forth  in the SWT  financial
statements, including the obligation to maintain the Patent Applications and any
patents  issued  pursuant   thereto  or  in  a  schedule   attached  hereto  and
specifically agreed to by CENTREX.




                                       -6-

                                                  Sequentially numbered page 175
<PAGE>


     (m) Taxes.  All returns,  reports,  statements  and other  similar  filings
required to be filed by SWT with respect to any federal, state, local or foreign
taxes,  assessments,   interests,   penalties,   deficiencies,  fees  and  other
governmental  charges or impositions have been timely filed with the appropriate
governmental  agencies  in all  jurisdictions  in  which  such tax  returns  are
required to be filed;  all sucb tax returns  properly reflect all liabilities of
SWT for taxes for the  periods,  property  or events  covered  thereby;  and all
taxes,  whether or not reflected on those tax returns,  and all taxes claimed to
be due from SWT by any taxing authority,  have been properly paid, except to the
extent contested in good faith by appropriate proceedings and reserves have been
established  in its  financial  statements  to the full extent if the contest is
adversely  decided  against it. SWT has not received any notice of assessment or
proposed assessment in connection with any tax returns,  SWT has not extended or
waived  the  application  of any  statute  of  limitations  of any  jurisdiction
regarding the  assessment  or  collection  of any taxes.  There are no tax liens
(other than any lien which arises by operation of law for current  taxes not yet
due and  payable)  on any of its  assets.  There is no basis for any  additional
assessment of taxes,  interest or penalties.  SWT has made all deposits required
by law to be made with respect to employees'  withholding  and other  employment
taxes,  including  without  limitation the portion of such deposits  relating to
taxes imposed upon SWT.

     (n) Absence of Certain Changes or Events. SWT has not:

          (i)  Sold,  encumbered,  assigned or  transferred  any of its material
               assets or its interest in the Patent  Applications or the License
               or any other material asset; or

          (ii) Amended or terminated the License or the Patent Applications; or

          (iii) Suffered any material damage, destruction or loss; or

          (iv) Received  notice or has knowledge of any material  adverse effect
               on the Patent  Applications  or the License or any other material
               asset or liability of SWT; or

          (v)  Made any  commitments or agreements for capital  expenditures  or
               otherwise; or

          (vi) Entered into any transaction or made any commitment not disclosed
               to CENTREX; or

          (vii)Agreed to take any of the actions set forth in this paragraph.




                                       -7-

                                                  Sequentially numbered page 176
<PAGE>


     (o)  Material  Contracts.  A complete  and  accurate  copy of all  material
agreements, contracts and commitments of the following types, whether written or
oral to which it is a party or is bound,  has been  provided to CENTREX and such
agreements are in full force and effect without amendment. In addition:

          (i)  There are no  outstanding  unpaid  promissory  notes,  mortgages,
               indentures,   deeds  of  trust,  security  agreements  and  other
               agreements and instruments  relating to the borrowing of money by
               or any extension of credit to SWT; and

          (ii) There are no outstanding operating  agreements,  lease agreements
               or similar agreements by which SWT is bound; and

          (iii)The  complete and  executed  License and the Patent  Applications
               with all schedules,  exhibits and amendments  related thereto and
               all material  correspondence with the patent authorities relating
               thereto have been provided to CENTREX; and

          (iv) There  are no  outstanding  licenses  to or  from  others  of any
               intellectual property and trade names; and

          (v)  There are no outstanding  contracts or commitments to sell, lease
               or otherwise dispose of any of the property of SWT.

     (p) Compliance  with Laws. SWT is in compliance  with all applicable  laws,
rules,  regulations  and  orders  promulgated  by any  federal,  state  or local
governmental  body or agency relating to its business and  operations.  SWT owns
all franchises,  licenses, permits, easements,  rights,  applications,  filings,
registrations  and other  authorizations  which are  necessary for it to conduct
business,  all of which are valid and in full  force and  effect,  and SWT is in
full compliance therewith.

     (q)   Litigation.   There  is  no  suit  or  action  or  any   arbitration,
administrative,  legal or other  proceeding  of any  kind or  character,  or any
governmental  investigation  pending  or  threatened  against  SWT,  the  Patent
Applications,  the License or affecting its assets or business,  and there is no
factual  basis  therefor.   There  are  no  pending  or  threatened  actions  or
proceedings before any court,  arbitrator or administrative  agency which would,
if  adversely  determined,  individually  or in the  aggregate,  materially  and
adversely affect its assets or business.

     (r) Employees.  SWT has no employees. SWT is not a party to or bound by any
employment agreement or any collective  bargaining agreement with respect to any
of the employees.


                                       -8-

                                                  Sequentially numbered page 177
<PAGE>


     (s) Employee Benefit Plans.  There are no employee benefit plans in effect,
and there are no outstanding or unfunded liabilities to employees of SWT.

     (t)  Books and  Records.  The books and  records  of SWT are  complete  and
accurate in all material  respects,  fairly present its business and operations,
have been maintained in accordance with good business practices,  and accurately
reflect  in  all  material  respects  its  business,   financial  condition  and
liabilities.

     (u) No Broker's  Fees.  Neither  UTEK nor SWT has  incurred  any  finder's,
broker's,  investment  banking,  financial,  advisory or other  similar  fees or
obligations.

     (v) Full Disclosure.  All representations or warranties of UTEK and SWT are
true, correct and complete in all material respects on the date hereof and shall
be true,  correct and complete in all material  respects as of the Closing as if
they were made on such date. No statement  made by SWT herein or in the exhibits
and schedules hereto or any document  delivered by SWT or on its behalf pursuant
to this  Agreement  contains an untrue  statement  of material  fact or omits to
state all material facts necessary to make the statements therein not misleading
in any material respect.

     2.02. General Representations and Warranties of CENTREX. CENTREX represents
and warrants to UTEK and SWT that the facts set forth are true and correct:

     (a) Organization. CENTREX is a corporation duly organized, validly existing
and in good standing under the laws of the State of Oklahoma, is qualified to do
business  as a  foreign  corporation  in each  other  jurisdiction  in which the
conduct  of  its  business  or the  ownership  of its  properties  require  such
qualification, and has all requisite power and authority to conduct its business
and operate properties.

     (b) Authorization.  The execution of this Agreement and the consummation of
the  Merger  and the  other  transactions  contemplated  hereby  have  been duly
authorized  by the Board of  Directors  and  Shareholders  of CENTREX;  no other
corporate  action  on its  part is  necessary  in  order  to  execute,  deliver,
consummate  and  perform its  obligations  hereunder;  and it has all  requisite
corporate  and other  authority  to  execute  and  deliver  this  Agreement  and
consummate the transactions contemplated hereby.

     (c)   Capitalization.   The  authorized  capital  of  CENTREX  consists  of
45,000,000 shares of common stock, par value $.001 per share, of which 7,000,000
shares are issued and outstanding immediately, and 5,000,000 shares of Preferred
Stock,  none of which is issued and  outstanding.  All  issued  and  outstanding
shares of common  stock of  CENTREX  have been duly and  validly  issued and are
fully paid and  non-assessable  shares and have not been issued in  violation of
any preemptive or other rights of any other person or any applicable laws. There
will be no outstanding options, warrants,  commitments, calls or other rights or
agreements  requiring  it to  issue  any  shares  of  CENTREX  common  stock  or
securities

                                       -9-

                                                  Sequentially numbered page 178
<PAGE>


convertible into shares of its common stock to anyone for any reason  whatsoever
immediately  after the  Effective  Time,  except  that  CENTREX  has  adopted an
incentive  stock  option plan and has reserved  for  issuance  thereunder  up to
3,000,000 shares, none of which has been currently granted.

     (d) Binding Effect. The execution,  delivery,  performance and consummation
of the Merger and the  transactions  contemplated  hereby  will not  violate any
obligation to which CENTREX is a party and will not create a default  hereunder;
and this Agreement constitutes a legal, valid and binding obligation of CENTREX,
enforceable  in  accordance  with its terms,  except as the  enforcement  may be
limited  by  bankruptcy,  insolvency,  moratorium,  or  similar  laws  affecting
creditor's  rights  generally  and by the  availability  of  injunctive  relief,
specific performance or other equitable remedies.

     (e) Litigation Relating to this Agreement.  There are no suits,  actions or
proceedings  pending  or to its  knowledge  threatened  which seek to enjoin the
Merger or the transactions contemplated by this Agreement or which, if adversely
decided,  would have a materially  adverse  effect on its  business,  results of
operations, assets, prospects or the results of its operations of CENTREX.

     (f) No Conflicting  Agreements.  Neither the execution and delivery of this
Agreement  nor the  fulfillment  of or  compliance  by CENTREX with the terms or
provisions hereof will result in a breach of the terms, conditions or provisions
of, or  constitute a default  under,  or result in a violation of, its corporate
charter or bylaws,  or any agreement,  contract,  instrument,  order judgment or
decree to which it is a party or by which it or any of the  assets is bound,  or
violate any  provision of any  applicable  law, rule or regulation or any order,
decree,  writ or injunction of any court or governmental entity which materially
affects its assets or business.

     (g) Consents. No consent from or approval of any court, governmental entity
or any other person is necessary in  connection  with its execution and delivery
of this  Agreement and  performance of the  obligations of CENTREX  hereunder or
under any other agreement to which CENTREX is a party;  and the  consummation of
the transactions contemplated by this Agreement will not require the approval of
any entity or person in order to prevent the  termination of any material right,
privilege, license or agreement relating to CENTREX or its assets or business.

     (h)  Title to Its  Assets.  CENTREX  has good and  marketable  title to its
assets (tangible and intangible),  free and clear of all charges, claims, liens,
mortgages, options, restrictions,  security agreements and other encumbrances of
every kind or nature whatsoever.



                                      -10-

                                                  Sequentially numbered page 179
<PAGE>


     (i)  Condition of Tangible  Assets.  All of its  tangible  assets have been
operated in accordance with customary operating  practices generally  acceptable
in its industry to which and have been  maintained and are in good working order
and repair in the ordinary  course of business,  subject only to reasonable  and
ordinary wear and tear.

     (j) Financial  Statements.  The unaudited  financial  statements of CENTREX
attached as Schedule  2.02(j)  present  fairly its  financial  position  and the
results  of its  operations  on the dates  and for the  periods  shown  therein;
provided,  however,  that interim financial  statements are subject to customary
year-end  adjustments  and  accruals  that,  in the  aggregate,  will not have a
material  adverse  effect on the overall  financial  condition or results of its
operations.  CENTREX  has not  engaged  in any  business  not  reflected  in its
financial statements.  There have been no material adverse changes in the nature
of its business, prospects, the value of assets or the financial condition since
the  date  of  its  financial  statements.  There  are no  material  outstanding
obligations or liabilities  of CENTREX except as  specifically  set forth in the
CENTREX financial statements.

     (k) Taxes.  All returns,  reports,  statements  and other  similar  filings
required to be filed by it with respect to any federal,  state, local or foreign
taxes,  assessments,   interests,   penalties,   deficiencies,  fees  and  other
governmental  charges or impositions have been timely filed with the appropriate
governmental  agencies  in all  jurisdictions  in  which  such tax  returns  are
required to be filed;  all such tax returns  properly reflect all liabilities of
it for taxes for the periods, property or events covered thereby; and all taxes,
whether or not  reflected on those tax returns,  and all taxes claimed to be due
from it by any taxing  authority,  have been properly paid, except to the extent
it has contested in good faith by appropriate  proceedings and adequate reserves
have been  established  in its  financial  statements  to the full extent if the
contest is adversely  decided against it. CENTREX has not received any notice of
assessment or proposed  assessment in connection  with any tax returns.  CENTREX
has not extended or waived the  application of any statute of limitations of any
jurisdiction  regarding the assessment or collection of any taxes.  There are no
tax liens  (other  than any lien which  arises by  operation  of law for current
taxes not yet due and payable) on any of its assets. CENTREX has no knowledge of
any basis for any additional  assessment of taxes. CENTREX has made all deposits
required  by law to be made with  respect to  employees'  withholding  and other
employment  taxes,  including  without  limitation  the portion of such deposits
relating to taxes imposed upon it.

     (1) Absence of Certain Changes or Events. CENTREX has not:

          (i)  Sold,  encumbered,  assigned or  transferred  any of its material
               assets for less than fair consideration; or

          (ii) Amended or terminated any material agreement; or

          (iii) Suffered any material damage, destruction or loss; or



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          (iv) Received notice or have knowledge of any material  adverse effect
               on its material assets; or

          (v)  Made any commitments or agreements for capital expenditures; or

          (vi) Entered into any transaction other than in the ordinary course of
               business  consistent with past practice,  except that CENTREX has
               made an offer regarding Food Technology Services,  Inc ("FTS") in
               conjunction  with  and  in  full  cooperation  with  UTEK,  which
               proposal has not been acted upon by FTS; and

          (vii) Agreed to take any of the actions set forth in this paragraph.

     (m)  Material  Contracts.  A complete  and  accurate  copy of all  material
agreements, contracts and commitments of the following types, whether written or
oral to which it is a party or is bound, has been provided to UTEK:

          (i)  All material promissory notes,  mortgages,  indentures,  deeds of
               trust,  security  agreements and other agreements and instruments
               relating to the  borrowing of money by or any extension of credit
               to it; and

          (ii) All material operating agreements and lease agreements; and

          (iii)All  material  licenses  to or from  others  of any  intellectual
               property and trade names.

     (n)  Compliance  with Laws.  CENTREX is in compliance  with all  applicable
laws, rules,  regulations and orders promulgated by any federal,  state or local
governmental  body or agency  relating to its business and  operations.  CENTREX
owns  all  franchises,   licenses,  permits,  easements,  rights,  applications,
filings,  registrations and other  authorizations  which are necessary for it to
conduct business, all of which are valid and in full force and effect, and it is
in full compliance therewith.

     (o)   Litigation.   There  is  no   suit,   action   or  any   arbitration,
administrative,  legal or other  proceeding  of any  kind or  character,  or any
governmental investigation pending or threatened against it affecting its assets
or business,  and there is no factual  basis  therefor.  There are no pending or
threatened actions or proceedings before any court, arbitrator or administrative
agency which would, if adversely  determined,  individually or in the aggregate,
materially and adversely affect its assets or business.

     (p) Employees. CENTREX has 5 part-time employees, four of whom are employed
but do not receive cash compensation. CENTREX has no written agreements with its
employees.


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     (q)  Employee  Benefit  Plans and  Arrangements.  CENTREX has no  full-time
employee  benefit plans in effect,  and CENTREX has no unfunded  liabilities  to
employees.

     (r) Books and  Records.  The books and records of CENTREX are  complete and
accurate in all material  respects,  fairly present its business and operations,
have been maintained in accordance with good business practices,  and accurately
reflect in all material respects its business and financial condition.

     (s)  No  Broker's  Fees.  CENTREX  has  incurred  no  finder's,   broker's,
investment banking, financial,  advisory or other similar fee in connection with
this Agreement.

     (t) Full Disclosure. All representations or warranties of CENTREX are true,
correct and  complete in all  material  respects on the date hereof and shall be
true, correct and complete in all material respects as of the Closing as if they
were made on such date.  No  statement  made by it herein or in the exhibits and
schedules  hereto or any document  delivered by it or on its behalf  pursuant to
this Agreement  contains an untrue  statement of material fact or omits to state
all material facts  necessary to make the  statements  therein not misleading in
any material respect.

     2.03. Investment  Representations of SWT Shareholders.  SWT, for itself and
for its shareholders, represents and warrants to CENTREX that.

     (a)  General.  Each  shareholder  has  such  knowledge  and  experience  in
financial  and  business  matters as to be capable of  evaluating  the risks and
merits of an  investment  in the shares  ("Shares")  of common  stock of CENTREX
issuable  pursuant to the Merger.  Each shareholder is able to bear the economic
risk of the investment in the Shares,  including the risk of a total loss of the
investment  in  the  Shares.   The   acquisition  of  the  Shares  is  for  each
shareholder's  own account and is for  investment.  Except as  permitted by law,
each shareholder has no present intention of selling,  transferring or otherwise
disposing in any way of all or any portion of the Shares.  All information  that
each  shareholder  has supplied to CENTREX in connection  with this Agreement is
true and correct. Each shareholder acknowledges that an investment in the Shares
involves  a very  high  degree  of risk.  Each  shareholder  has  conducted  all
investigations and due diligence  concerning CENTREX which it deems appropriate,
and each shareholder has found all such information  obtained fully  acceptable.
Each  shareholder  is  knowledgeable  about the prospects,  business,  financial
condition, operations and possible acquisitions of CENTREX. Each shareholder has
had an  opportunity  to ask  questions of the officers and  directors of CENTREX
concerning the Shares and the business and financial  condition of and prospects
for CENTREX,  and the officers and directors of CENTREX have adequately answered
all questions  asked and made all relevant  information  requested  available to
each  shareholder.  Each  shareholder  understands  that  success  of CENTREX is
dependent upon CENTREX's  receipt of funds necessary to provide working capital,
which may not occur. Each shareholder understands


                                      -13-

                                                  Sequentially numbered page 182
<PAGE>


and agrees that the following restrictions and limitations are applicable to the
purchase,   resale  and  distribution  of  the  Shares  pursuant  to  applicable
securities laws.

     (b) Stock Transfer Restrictions.

     (i)  Each  shareholder is aware that it must bear the full economic risk of
          an  investment  in the Shares of CENTREX for an  indefinite  period of
          time, because the transaction in which the Shares are being issued has
          not been  registered  under the  Securities  Act of 1933,  as  amended
          ("Securities  Act"),  or  the  securities  laws  of  any  state;  and,
          therefore,  the  Shares  cannot  be  sold,  pledged,   transferred  or
          otherwise  disposed of unless  registered under applicable  securities
          laws or an exemption from registration is available.  Each shareholder
          further  understands that only CENTREX can take action to register the
          Shares, and the cost of registration is prohibitive.

     (ii) A legend will be placed on the  certificates  representing  the common
          stock of CENTREX in substantially the following form:

                             NOTICE OF TRANSFER RESTRICTIONS

     The shares  evidenced by this Certificate have been acquired for investment
     only and have not been  registered  under the  Securities  Act of 1933,  as
     amended,  or the securities laws of any state.  The Shares may not be sold,
     transferred,  pledged or  otherwise  disposed  of without the receipt of an
     opinion  of counsel  acceptable  to CENTREX  that no such  registration  is
     required.

     (iii)Stop  transfer  instructions  have been placed in  CENTREX's  transfer
          records  with  respect to the Shares to insure  that any  transfer  or
          disposition  thereof is in full  compliance  with applicable law. Each
          shareholder  agrees that  CENTREX may refuse or delay  transfer of the
          Shares or impose other  restrictions  on the transfer of the Shares if
          CENTREX is not satisfied that the transfer is lawful. However, CENTREX
          acknowledges and agrees that this  determination must be made within a
          reasonable time; and if CENTREX finds the transfer is satisfactory and
          permitted  by  applicable  law,  CENTREX  will not refuse or delay the
          transfer.


                                   ARTICLE III
                                 INDEMNIFICATION

     3.01 By UTEK.  UTEK agrees to indemnify,  defend and hold harmless  CENTREX
and its shareholders, directors, officers, employees, agents and representatives
and their respective  successors and assigns against and in respect of any cost,
damage, expense

                                      -14-

                                                  Sequentially numbered page 183
<PAGE>


(including  reasonable  legal  fees  and  actual  expenses),  liability  or loss
incurred or suffered by any of them  resulting  from or arising out of the:  (i)
breach,  inaccuracy,  misrepresentation  or  untruth  of any  representation  or
warranty,  or the  nonfulfillment of any agreement or covenant of UTEK contained
in this  Agreement  or in any  document  delivered  by  UTEK  or SWT to  CENTREX
pursuant hereto; and (ii) any action,  assessment,  claim, demand, proceeding or
suit incident to any of the  foregoing.  The liability of UTEK  hereunder may be
satisfied  by the return to CENTREX of shares of  CENTREX  common  stock  issued
pursuant  hereto  valued  at the fair  market  value on the date the  breach  is
discovered to the extent of the breach.

     3.02 By CENTREX. CENTREX agrees to indemnify and hold harmless UTEK and its
directors,  officers, employees, agents and representatives and their respective
successors  and  assigns  against  and in respect of any cost,  damage,  expense
(including  reasonable  legal  fees  and  actual  expenses),  liability  or loss
incurred or suffered  by any of them  resulting  from or arising out of: (i) the
breach,   inaccuracy,   misrepresentation  or  untruth  of  any  representation,
warranty,  or the  nonfulfillment  of  any  agreement  or  covenant  of  CENTREX
contained in this Agreement or in any document  delivered by it to UTEK pursuant
hereto;  and (ii) any action,  assessment,  claim,  demand,  proceeding  or suit
incident to any of the foregoing.

     3.03 Costs.  The  indemnification  rights and obligations of a party hereto
shall  include  the  right  to  receive  and the duty to pay and  reimburse  the
indemnified  party  all  its  reasonable  costs  and  expenses  incurred  in the
enforcement of its rights hereunder.

     3.04 Survival of Representations and Warranties.

     (a) By UTEK. The  representations and warranties made by UTEK shall survive
for a period of 3 years after Closing,  and thereafter all such  representations
and warranties shall be extinguished, except with respect to claims then pending
for which specific  notice has been given during such 3 year period.  UTEK shall
have  liability  and  responsibility  for  the  surviving   representations  and
warranties made by it herein, notwithstanding any due diligence investigation or
examination by CENTREX.

     (b) By CENTREX.  The  representations  and warranties made by CENTREX shall
survive  for a  period  of 3  years  after  Closing,  and  thereafter  all  such
representations  and warranties  shall be  extinguished,  except with respect to
claims then pending for which specific  notice has been given during such 3 year
period.  CENTREX  shall have  liability  and  responsibility  for the  surviving
representations  and  warranties  made  to  CENTREX,   notwithstanding  any  due
diligence investigation or examination by UTEK.

     3.05 Limitations on Liability.  Notwithstanding  any other provision herein
to the contrary, neither party hereto shall be liable to the other party for any
cost, damage,  expense,  liability or loss under this indemnification  provision
until after the sum of all amounts

                                      -15-

                                                  Sequentially numbered page 184
<PAGE>


individually  when added to all other  such  amounts  in the  aggregate  exceeds
$5,000, and then such liability shall apply only to matters in excess of $5,000.

     3.06  Rights  of  Indemnitors.  The  indemnified  party  shall  notify  the
indemnifying  party of the assertion or  commencement  of such action,  claim or
proceeding  within a  reasonable  period of time or, if  citation  or service of
process has been made, within 15 days thereafter.  The indemnified party may, at
its option and at its sole  expense,  participate  in the defense of and contest
any such action, claim or proceeding;  provided,  however, the indemnified party
shall at all times  also have the right to  participate  fully  therein.  If the
indemnifying party, within a reasonable time after receiving such notice,  fails
to  participate,  the indemnified  party shall have the right,  but shall not be
obligated,  to undertake the defense of the action,  claim or proceeding for the
account of and at the risk of the indemnifying party; provided,  however, in the
event  that the  indemnified  party  shall  determine  to  compromise  or settle
(exercising  its judgment in good faith) any such action,  claim or  proceeding,
the indemnified party shall be required to give the indemnifying  party 15 days'
notice of such  determination  after its receipt of actual  notice of the claim.
The indemnified party shall then be entitled to compromise or settle the action,
claim or  proceeding  for the  account  of and at the  risk of the  indemnifying
party;  provided,  however,the settlement shall be effective without the consent
of both the  indemnifying  and indemnified  parties,  which consent shall not be
reasonably  withheld.  The parties agree that any indemnified party may join any
indemnifying party in any action,  claim or proceeding brought by a third party,
as to which any right of  indemnity  created  by this  Agreement  would or might
apply,  for the purpose of enforcing any right of the indemnity  granted to such
indemnified party pursuant to this Agreement.

     3.07  Additional  Rights.  Any right of indemnity of any party  pursuant to
this Agreement  shall be in addition to and shall not operate as a limitation on
any other  right to  indemnity  of such party  pursuant to this  Agreement,  any
document or  instrument  executed in  connection  with the  consummation  of the
transaction contemplated hereby or otherwise.

                                   ARTICLE IV
                                   ARBITRATION

     In the event a dispute arises with respect to the  interpretation or effect
of this Agreement or concerning the rights or obligations of the parties hereto,
the parties  agree to  negotiate in good faith with  reasonable  diligence in an
effort to resolve the dispute in a mutually acceptable manner.  Failing to reach
a resolution thereof, either party shall have the right to submit the dispute to
be settled by  arbitration  under the  Commercial  Rules of  Arbitration  of the
American Arbitration Association.  The parties agree that all arbitrations shall
be  conducted  in Tulsa,  Oklahoma,  unless the  parties  mutually  agree to the
contrary.  The cost of arbitration  shall be borne by the party against whom the
award is rendered or, if in the interest of fairness, as allocated in accordance
with the judgment of the arbitrators. All


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<PAGE>


awards in  arbitration  made in good faith and not infected  with fraud or other
misconduct shall be final and binding.

                                    ARTICLE V
                                  MISCELLANEOUS

     No party may assign any right or obligation hereunder the Agreement without
the written consent of the other parties hereto.  No permitted  assignment shall
relieve a party of its  obligations  under this  Agreement  without the separate
written  consent of the other parties.  This Agreement shall be binding upon and
enure to the benefit of the parties and their  respective  permitted  successors
and  assigns.  Each party agrees that it will comply with all  applicable  laws,
rules and regulations in the execution and performance of its obligations  under
this Agreement.  This Agreement shall be governed by and construed in accordance
with the laws of the State of Oklahoma. This document constitutes a complete and
entire  agreement  among the parties with  reference to the subject  matters set
forth herein.  No statement or agreement,  oral or written,  made prior to or at
the execution  hereof and no prior course of dealing or practice by either party
shall vary or modify the terms set forth herein without the prior consent of the
other parties hereto.  This Agreement may be amended only by a written  document
signed by the parties.  Notices or other  communications  required to be made in
connection  with this Agreement shall be delivered to the parties at the address
set forth below or at such other  address as may be changed from time to time by
giving written  notice to the other  parties.  This Agreement may be executed in
multiple  counterparts,  each  of  which  shall  constitute  one  and  a  single
Agreement.

                                   ARTICLE VI
                          PIGGYBACK REGISTRATION RIGHTS

     CENTREX  covenants  and  agrees  that if it files with the  Securities  and
Exchange Commission an underwritten  registration  statement on SEC Form SB-1 or
SB-2 or Form S-1 or its equivalent,  which includes the offer of shares owned by
shareholders  of CENTREX,  CENTREX  will use its best efforts to include some or
all of the  shares  of  CENTREX  common  stock  issued  to and then held by UTEK
pursuant to this Agreement.  lf the underwriters include any selling shareholder
shares,  UTEK shall be permitted to include some or all of its CENTREX shares on
a pro rata basis to the extent and upon the same terms and  conditions  as other
CENTREX  shareholders are permitted to have their CENTREX shares included in the
proposed  offering.  If the  underwriters  do not  permit  for  any  reason  the
inclusion of selling shareholder shares in the offering,  UTEK shares shall also
not be included. It is the expressed intent of this Article that UTEK be treated
exactly the same as any other selling CENTREX shareholder in connection with any
underwritten  offering  of CENTREX  common  stock,  no better  and no worse.  If
CENTREX proposes an underwritten offering, CENTREX will give UTEK 15 days' prior
written  notice  thereof,  and UTEK shall  give  CENTREX  notice  within 10 days
thereafter  of UTEK's  desire  as to the  number of  shares,  if any,  that UTEK
desires to

                                      -17-

                                                  Sequentially numbered page 186
<PAGE>


include in the  offering.  CENTREX will notify the lead  underwriters  of UTEK's
desire, and CENTREX will include UTEK shares in accordance with this Article. As
a condition of including  any UTEK shares in the  offering,  UTEK shall (i) sign
all underwriting agreements, representations, warranties, certificates and other
papers as the underwriters  require of UTEK and other CENTREX shareholders whose
shares are to be  included in the  offering;  (ii) pay pro rata all costs of the
offering to the same extent as other CENTREX selling  shareholders  are required
to pay; and (iii) take all other actions and do all other things as are required
of other selling  shareholders.  Failure of UTEK to respond within 10 days after
notice of CENTREX's intention to file an underwritten  offering shall constitute
a waiver of the rights set forth in this Article.


     IN WITNESS  WHEREOF,  the parties  have caused  this  Agreement  to be duly
executed by a duly authorized officer this 17th day of September, 1999.



CENTREX, INC.                             SAFEWATER TECHNOLOGIES, INC.

By:/ s /  Gifford M. Mabie                By:/ s /  Uwe Reischl
___________________________               _______________________
Gifford M. Mabie, President               Uwe Reischl, President

                                          UTEK Corporation

                                          By:/ s /  Clifford M. Gross
                                          ___________________________
                                          Dr. Clifford M. Gross, Chief Executive
                                          Officer





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