RESEARCH FRONTIERS INC
S-3/A, 1999-02-25
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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As filed with the Securities and Exchange Commission on February 25, 1999
Registration No.  333-65219 
    

                        SECURITIES AND EXCHANGE COMMISSION
                              Washington, D.C. 20549
   
                          PRE-EFFECTIVE AMENDMENT NO. 3
    
                                     FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
    
                         RESEARCH FRONTIERS INCORPORATED
             (Exact name of the Company as specified in its charter)

         Delaware                           2899                    11-2103466
(State or other jurisdiction (Primary Standard Industrial       (I.R.S. Employer
 of incorporation or          Classification Code Number) Identification Number)
   organization)
                               240 Crossways Park Drive
                            Woodbury, New York 11797-2033
                                   (516) 364-1902
(Address, including zip code, and telephone number, including area code, of the
              registrant's principal executive offices)

                            Robert L. Saxe, President
                         Research Frontiers Incorporated
                              240 Crossways Park Drive
                          Woodbury, New York 11797-2033
                                  (516) 364-1902
(Name, address, including zip code, and telephone number, including area code, 
of agent for service)

                                    Copies to:

               Joseph M. Harary, Vice President and General Counsel
                         Research Frontiers Incorporated
                              240 Crossways Park Drive
                          Woodbury, New York 11797-2033
                                  (516) 364-1902

Approximate date of commencement of the proposed sale to the public:  As soon as
practicable after the Registration Statement becomes effective.

If the only securities being registered on this Form are being offered pursuant
to dividend or interest investment plans, please check the following box [  ] 

If any of the securities being registered on this Form are to be offered on a 
delayed or continuous pursuant to Rule 415 under the Securities Act of 1933 
other than securities offered only in connection with dividend or interest 
reinvestment plans, check the following box [X]

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act of 1933, please check the following box 
and list the Securities Act registration statement number of the earlier 
effective registration statement for the same offering.[   ]

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under 
the Securities Act of 1933, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement 
for the same offering. [ ]______________________ 

If delivery of the prospectus is expected to be made pursuant to Rule 434, 
please check the following box. [  ]

                         CALCULATION OF REGISTRATION FEE

Title of                             Proposed maximum Proposed maximum Amount of
Shares              Amount to        offering price   aggregate        registra-
to be registered    be registered(1) per Share        offering price   tion fee

Common Stock,$0.0001
par value per share  2,331,000 shares $6.59375       $15,370,031.25 $4,534.16(2)

(1) Estimated solely for the purpose of computing the amount of the registration
fee pursuant to Rule 457(c) under the Securities Act of 1933, as amended.  The 
shares of common stock being registered are issuable pursuant to the exercise of
a  Class A Warrant and Class B Warrant (the "Warrants"). The proposed maximum 
offering price per share of $6.59375 was calculated based upon the average of 
the high and low trading price per share of common stock on the Nasdaq National
Market System on September 25, 1998 which was within five business days of the 
original filing of this Registration Statement.  In accordance with Rule 416 
under the Securities Act of 1933, common stock offered hereby shall also be 
deemed to cover an indeterminate number of securities to be offered or issued
to prevent dilution resulting from stock splits, stock dividends or similar 
transactions.

(2)  Previously paid as part of $4,743.60 fee paid upon filing of Registration 
Statement on Form S-3 (Reg. No. 333-65219) on October 1, 1998.

The Registrant hereby amends this Registration Statement on such date or dates 
as may be necessary to delay its effective date until the Registrant shall file
a further amendment which specifically states that this Registration Statement 
shall thereafter become effective in accordance with Section 8(a) of the 
Securities Act of 1933 or until the Registration Statement shall become 
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.<PAGE>

     
  Prospectus
      
  
                                  
                 Research Frontiers Incorporated
  
  
                2,331,000 Shares of Common Stock 
    
  
     
  Ailouros Ltd. is underwriting the sale of up to 2,331,000 shares of
  common stock of Research Frontiers. Ailouros will buy these
  shares from us at the price specified in certain warrants, and may
  sell these shares in the open market, or may decide to keep them
  for investment.
      
 
    
  Research Frontiers' common stock trades on the Nasdaq National
  Market System  under the trading symbol "REFR."  On February
  24, 1999, the last sales price of a share of common stock was
  [$7.8125]. Our offices are located at: 240 Crossways Park Drive,
  Woodbury, NY 11797 (Telephone: 516-364-1902).
      
       
  Please read and consider carefully the risk factors beginning
  on page 2 if you are deciding whether or not to invest in our
  common stock.
  
  Neither the Securities and Exchange Commission nor any state
  securities commission has approved or disapproved of these
  securities or passed upon the adequacy or accuracy of this
  prospectus.  Any representation to the contrary is a criminal
  offense.
  
    
  
                          Ailouros Ltd.
  
   
       The date of this prospectus is [February __, 1999.]
    
<PAGE>

                   RISK FACTORS                

   
There are risks associated with investing in companies such as ours who
are engaged in research and development.  Because of these risks, you
should only invest if you are able to bear the risk of losing your entire
investment.  Before investing, in addition to risks which could apply to
any issuer or offering, you should also consider the business we are in
and the following:
    

   
Research Frontiers is not profitable.  To date, Research Frontiers' has
lost money, and we expect to lose money in the foreseeable future. 
Unless our licensees produce and sell products using our technology,
Research Frontiers will not be profitable. There is no guarantee that we
will ever be profitable. Since Research Frontiers was started in 1965
through September 30, 1998, its total net loss was $25,710,684.  In 1997
our net loss was $3,229,445 and was $1,970,916 during the first nine
months of 1998.
    

   
Research Frontiers may need additional funds.  Since Research
Frontiers has not been profitable, we have funded our operations by
selling our common stock to investors.  If we need additional money,
there is no guarantee that it will be available when we need it, or on
favorable terms.  However, we do not believe that we will need 
additional money for at least the next two and one-half years, even if no
money is received from this offering. Our estimate is based upon:

o  Our current expenses which we assume will increase by 10% each year. 
o  The $7.4 million in cash and investments we had on hand as of
   September 30, 1998.
o  Budgeted revenues, and
o  The fact that our losses from operations for the first nine months of
   1998 should correspond to an annual loss for the entire year of
   about $2.6 million.

The risk to the Company is that after two and one-half years, we may not
be able to raise additional money to fund our operations if we are not
profitable by then.
    

   
Research Frontiers cannot predict exactly how much additional funds
it may need. We expect to use our cash and investments to fund our
research and development of SPD technology and for other working
capital purposes.  The amount of money we need depends upon many
factors, including:

o  Whether our research and development activities are immediately
   successful or whether developments take a long time.
o  What developments, if any, our competitors make that we will
   need to respond to.
o  When and how much it costs to file patents on our inventions. This
   depends upon how complex the invention is, and when the
   invention was made.
o  Whether we gain new licensees or enter into different future
   relationships with our existing licensees.

We cannot quantify how much of our working capital requirements
depend on each of these factors.  For example, increased research and
development activities would increase such requirements.  Adding new
licensees may provide additional working capital but may also require
additional working capital as a result of additional research and
development which may be required for such licensee.  If our
relationship with existing licensees change, this could have a favorable
or negative impact, depending upon the nature of such change.
    

   
Products using SPD technology have not yet been introduced into the
marketplace.  Developing products using new technologies can be risky
because problems, expenses and delays frequently occur.
    

   
SPD technology is the only technology Research Frontiers works with. 
Because of this, all products being developed by Research Frontiers'
licensees depend on the viability of its SPD technology.  We have not
developed any other technology. Thus, if our licensees do not develop
commercially acceptable products using our SPD technology, we will
not be successful.
    

   
There may be other technologies which compete with Research
Frontiers' SPD technology.  Some of these technologies are being
developed or used by companies with substantially greater financial,
marketing, technical and other resources.  These companies may also
have better name recognition than Research Frontiers. We have not fully
ascertained the performance and long-term reliability of our technology,
and therefore there is no guarantee that our technology will successfully
compete with these other technologies.
    

   
Research Frontiers depends upon the activities of its licensees and
does not directly manufacture or market products using SPD
technology.  Research Frontiers' SPD technology is currently licensed to
eight companies.  Other companies are also evaluating the technology
for use in various products. In the past, some companies have evaluated
our technology without proceeding further.  Also, we do not intend to
manufacture products using SPD technology.  Instead we intend to
continue to license our technology to manufacturers of end products and
films.  We expect that our licensees would be primarily responsible for
marketing and manufacturing.
    

   
Research Frontiers cannot control whether or not its licensees will
develop SPD products.  Some of our licensees appear to be more active
than others, and some licensees appear to be inactive. There is no
guarantee when or if our licensees will successfully produce any
commercial product using SPD technology.
    

   
Patent and trade secret protection is not a guarantee of commercial
success. Also, some of our patents cover older versions of SPD
technology which we may not use.  Research Frontiers has 18 United
States patents, 6 pending patent applications in the United States, 30
foreign patents, and 68 pending foreign patent applications protecting its
technology.  Some of these patents cover earlier versions and features of
our technology which we do not intend to exploit. Also, the issuance of
a patent does not carry any guarantee of commercial success.  There also
is no guarantee that these patents will be upheld if Research Frontiers
seeks to enforce its patent rights against an infringer or that we will have
enough money and other resources to do so.
    

   
Research Frontiers also relies, to a lesser extent, on trade secrets and
confidential disclosure agreements to protect its technology.  Neither
patents nor trade secrets will necessarily protect us from other persons
using similar technologies. Also, there is no guarantee that any particular
aspect of our technology will not infringe the claims of other existing
patents.
    

                       AVAILABLE INFORMATION

   
Research Frontiers  files reports, proxy statements and other information
with the Securities and Exchange Commission. You may read and copy
such reports, proxy statements and other information at the public
reference facilities maintained by the SEC at Room 1204, Judiciary
Plaza, 450 Fifth Street, N.W. Washington, D.C. 20549 and you can
obtain information on the operation of the Public Reference Room by
calling the SEC at 1-800-SEC-0330.  The SEC also maintains an internet
web site at http://www.sec.gov that contains reports, proxy and
information statements and other information regarding issuers,  such as
Research Frontiers, that file electronically with the SEC.  Additional
information about us can also be found at our web site at
http://www.refr-spd.com.
    

   
The SEC allows us to incorporate by reference the information we file
with them, which means that we can disclose important information to
you by referring you to those documents.  The information incorporated
by reference is considered to be part of this prospectus, and later
information that we file with the SEC will automatically update and
supersede this information.  We incorporate by reference into this
prospectus our:

o   annual report on Form 10-K for the fiscal year ended December 31, 1997
o   quarterly reports on Form 10-Q for the fiscal quarters ended March 31,
    1998, June 30, 1998, and September 30, 1998, and
o   any future filings made with the SEC under Sections 13(a), 13(c),
    14, or 15(d) of the Securities Exchange Act of 1934 until all of the
    common stock offered under this prospectus is sold.
    

   
This prospectus is part of a registration statement we filed with the SEC.
As permitted by the SEC, this prospectus does not contain all of the
information set forth in the registration statement and the exhibits and
schedules thereto.  The statements contained in this prospectus as to the
contents of any contract or any other document are not necessarily
complete.  In each case you should refer to the copy of such contract or
document filed as an exhibit to the registration statement.
    

   
We will provide each person to whom this prospectus is delivered, a
copy of any information we have incorporated by reference but have not
delivered along with this prospectus. If you would like a copy of any
document incorporated herein by reference, other than exhibits unless
such exhibits are specifically incorporated by reference in any such
document, you can call or write to us at our  principal executive offices:
240 Crossways Park Drive, Woodbury, New York 11797-2033,
Attention: General Counsel (Telephone: (516) 364-1902). We will
provide this information without charge to any person, including a
beneficial owner, to whom a copy of this prospectus is delivered upon
written or oral request.
    

   
No dealer, salesperson or other individual has been authorized to give
any information or to make any representation not contained in or
incorporated by reference in this prospectus or in any supplement to this
prospectus.  If given or made, you must not rely on such information or
representation as having been authorized by Research Frontiers or by
Ailouros. Neither the delivery of this prospectus nor any sale made
hereunder will, under any circumstances, create an implication that there
has not been any change in the affairs of Research Frontiers since the
date of this prospectus or that the information contained herein is correct
or complete as of any time after the date of this prospectus.
    

   
This prospectus and any supplement to this prospectus do not constitute
an offer to sell or a solicitation of an offer to buy any securities offered
hereby to any person, or by anyone, in any jurisdiction in which such
offer or solicitation may not lawfully be made.
    

   
The information set forth herein and in all publicly disseminated
information about Research Frontiers, includes "forward-looking
statements" within the meaning of Section 21E of the Securities
Exchange Act of 1934, as amended, and is subject to the safe harbor
created by that section. Readers are cautioned not to place undue
reliance on these forward-looking statements as they speak only as of the
date of this prospectus and are not guaranteed.
    

                            THE COMPANY

   
Research Frontiers' business is to develop and license its suspended
particle technology for controlling the amount of light passing through
the device. Such suspended particle devices are often referred to as
"SPDs" or "light valves."
    

SPDs use microscopic light-absorbing particles that are either in a liquid
suspension or a film. The microscopic particles align when an electrical
voltage is applied.  This permits light to pass through the device, and
allows the amount of light to be controlled. The first light valve of this
type was invented by Dr. Edwin Land, founder of Polaroid Corporation,
in 1932.  Since 1965, Research Frontiers has been actively working to
develop and license its own technology, which it protects using patents,
trade secrets and know- how.

SPD technology may have wide commercial applications in many types
of products where variable light transmission is desired, such as

o  "smart" windows
o   variable light transmission eyewear such as goggles and sunglasses
o   self-dimmable automotive sunroofs, sun visors and rear-view
    mirrors, and
o   flat panel information displays for use in computers, televisions,
    telephones and other electronic instruments.

   
Various licensees of Research Frontiers have developed prototypes of
smart window, automotive and eyewear products.  Also, prototypes of
flat panel displays and self-dimming automotive rear-view mirrors have
also been developed.  These prototypes demonstrate the feasibility and
operation of the products they relate to, but they may need additional
product design, engineering or testing before commercial products are
introduced.  Our licensees may consider the exact stage of development,
product introduction strategies and timetables, and other plans to be
proprietary or secret.
    

The following table summarizes Research Frontiers' existing license and
option agreements and lists the year these agreements were entered into:
 
Licensee or Optionee        Products Covered                      Territory

General Electric Company    SPD film for other licensees and      Worldwide
                            prospective licensees (1995)

Glaverbel, S.A.             Automotive vehicle rear-view mirrors,  Worldwide
                            transportation vehicle sun visors,and (exceptKorea
                            architectural windows (1996)          for windows)

Hankuk Glass Industries Inc.Broad range of SPD light control products Worldwide
                            including windows, flat panel displays,
                            automotive vehicle rear-view mirrors,
                            sun visors, and sunroofs; SPD film for 
                            licensees and prospective licensees (1997)

Japan Steel Works Ltd. and  Windows (1989)                         Japan
Central Glass Company Ltd.

Material Sciences Corp.     Architectural and automotive windows,  Worldwide
                            SPD film for other licensees, prospective
                            licensees and architectural and automotive
                            window companies (1997)

Vision-Ease Lens Azusa,Inc. Eyewear (1997)                         Worldwide

Saint Gobain Vitrage, S.A.  Architectural Windows (option)(1994)   Worldwide 
                                                                  (except Korea
                                                              and South America)

Sanyo Electric Co., Ltd.    Flat panel displays (1995)             Worldwide
                                                                      
   
Licensees will pay us a 3-10% royalty on the sale of licensed products,
and may also be required to pay us minimum annual royalties.  Research
Frontiers' license agreements typically allow the licensee to terminate
the license after some period of time, and give Research Frontiers only
limited rights to terminate before the license expires. Most licenses are
non-exclusive and generally last as long as our patents remain in effect.
The license granted to Hankuk Glass Industries is exclusive within
Korea for certain applications through December 2004. Vision-Ease's
license for eyewear is exclusive during the term of the license. To our
knowledge, three of our licensees, Hankuk Glass Industries, Vision-
Ease, and Material Sciences Corporation, currently have active programs
for developing SPD products.  One or more other licensees may become
more active if and when an SPD film becomes available. To the extent
that an inactive licensee's license agreement is listed above, it is only
done so as a matter of completeness to reflect those companies who we
believe are permitted to use SPD technology, and does not imply that
these inactive licensees will produce products in the future using SPD
technology, or that their license agreement permitting them to do so will
remain in effect.
    

   
Research Frontiers' main goals in its research and development are:

o  developing wider ranges of light transmission and quicker
   switching speeds,
o  developing different colored particles,
o  reducing the voltage required to operate SPDs, and
o  obtaining data and developing improved materials regarding
   environmental stability and longevity.

Research Frontiers spent about $1,831,000, $1,712,000, and $1,410,000
during the years ended December 31, 1997, 1996, and 1995,
respectively, for research and development.  Research Frontiers plans to
engage in substantial continuing research and development activities.
    

   
Six of Research Frontiers' eleven full-time employees are principally
engaged in research and development activities. Of these six employees,
two have obtained a doctorate in chemistry, one has a masters in
chemistry, two have extensive industrial experience in electronics and
electrical engineering, and one has majored in physics.  Two employees
also have additional postgraduate degrees in business administration. 
Also our suppliers and licensees have people on their teams with
advanced degrees in a number of areas relevant to the commercial
development of products using our technology.
    

                             DIVIDENDS

Research Frontiers has never paid any cash dividends and does not
expect to pay any cash dividends for the foreseeable future.

                          USE OF PROCEEDS

   
If you buy stock offered by Ailouros under this prospectus, it means that
either Research Frontiers has required Ailouros to exercise its Class A
Warrant or Ailouros has decided to exercise its Class B Warrant.
Research Frontiers will not directly receive any proceeds from the stock
you buy from Ailouros. However, Research Frontiers will receive from
Ailouros the aggregate exercise price of the warrants if such warrants are
exercised by Ailouros.
    

   
Research Frontiers received $10,000 for issuance of the warrants.  It
would receive total gross proceeds of $15 million if the Class A Warrant
is exercised in full, and would receive gross proceeds of $1,080,000 if
the Class B Warrant is exercised in full. 
    

   
We currently do not have any specific plans for money we receive from
Ailouros from their exercise of the warrants. We are raising the money
at this time because it is available on terms which we feel are very
attractive.  If Research Frontiers spends the money raised in this
offering, we expect to use it for research and development, working
capital, possible acquisitions, and for general corporate purposes
including executive compensation and other payroll expenses, in such
amounts as Research Frontiers, in its discretion, deems appropriate.
Until this money is used, we intend to invest such funds in money
market funds and other interest-bearing investments.  We do not
currently believe that we will need additional funds to accomplish our
goals.
    

                        SELLING STOCKHOLDER

   
Research Frontiers is registering the common stock issuable to Ailouros
upon exercise of the warrants.  Ailouros is a privately-owned and
independent institutional money management and investment fund. 
Ailouros' Managing Director, Michael Katz, manages the fund's
portfolio and has sole voting, investment and dispositive power over the
warrants and all common stock issuable upon exercise of the warrants. 
Ailouros does not, and has never, held any position, office or other
material relationship with Research Frontiers. Ailouros' main offices are
located in London.
    

   
The following table sets forth certain information regarding Ailouros'
beneficial ownership of our common stock as of the date of this
prospectus.  This table assumes that Research Frontiers permits the
exercise of the Class A Warrant, and that Ailouros sells all stock
received by it in this offering.  Ailouros can not own all shares listed
below at any one time because under the terms of the Class A Warrant,
Ailouros can not own more than 4.9% of Research Frontiers' stock.  If
Ailouros sells all of the stock from this offering, it will own less than 1%
of the outstanding shares.
    

   
                    Shares Beneficially Number of
                      Owned Prior to    Shares Offered
                       Offering         by Selling
Beneficial Owner            Number %    Shareholder

  Ailouros Ltd.       2,343,500  17.6   2,331,000
    

   
The numbers used in this table are estimates.  It is not possible to
calculate the exact number of shares of common stock which will be
ultimately issued upon exercise of the Class A Warrant because the
number of shares of common stock into which the Class A Warrant is
exercisable depends upon:

o whether Research Frontiers requires Ailouros to exercise all or part
  of the Class A Warrant issued to it, and
o the market price of Research Frontiers' common stock from time to time.
    

   
The aggregate exercise price of the Class A Warrant owned for by
Ailouros is $15 million.  If the entire $15 million were exercised by
Ailouros, based upon market conditions as of the date of this prospectus,
the Class A Warrant would be exercisable into [2,024,497] shares of
common stock.  If these shares plus the 131,000 shares issuable upon
exercise of the Class B Warrant were issued, this would represent
[16.46] percent of the total shares of common stock outstanding. 
However, as stated above, under the terms of the Class A Warrant,
Ailouros can not own more than 4.9% of Research Frontiers' common
stock.
    

   
As of the date of this prospectus:

o    no  put notices have been issued by Research Frontiers requiring
     Ailouros to exercise the Class A Warrant,
o    the Class A Warrant and the Class B Warrant have not been
     exercised, and
o    no common stock has been issued upon exercise of such warrants.
    

                     DESCRIPTION OF SECURITIES

Common Stock

   
Research Frontiers can issue 100,000,000 shares of common stock,
$0.0001 par value per share. [10,942,930] shares were outstanding as of
the date of this prospectus.  Holders of common stock are entitled to one
vote per share on matters submitted to shareholders for their approval, to
dividends if declared by Research Frontiers, and to share in any
distribution of Research Frontiers' assets.  All outstanding shares of
common stock are fully paid for and non-assessable.  Holders of
common stock do not have cumulative voting rights or preemptive
rights.  Therefore, a minority stockholder may be less able to gain
representation on Research Frontiers' board of directors.
    

The Warrants

   
On October 1, 1998, Research Frontiers sold Ailouros the Class A
Warrant and the Class B Warrant.  By raising money through the
exercise of the Class A Warrant, Research Frontiers can choose when
and if it raises money through future equity offerings, and the size of
such offerings.  It also allows Research Frontiers to take into account
prevailing market conditions and corporate opportunities, and to control
the general price at which its common stock is sold to Ailouros.  This
gives Research Frontiers a source of equity funding on terms we think
are very favorable if and when we need it.
    

Class A Warrant

   
o   The Class A Warrant is a put option which allows Research
    Frontiers to require Ailouros to buy  from Research Frontiers a
    dollar amount of common stock set from time to time by Research
    Frontiers. We can raise a maximum of $15 million over the life of
    the Class A Warrant, and we can raise between $0 to $1.5 million
    during each three-month period set by us.  We may also choose not
    to issue any shares of common stock under the Class A Warrant.
    

   
o   Research Frontiers, at its discretion, sets the dollar amount of the
    Class A Warrant to be exercised, and the minimum or floor price
    per share below which such warrant may not be exercised. We can
    reset this amount before each three-month exercise period begins. 
    Therefore, at the beginning of each three-month period, Research
    Frontiers can control the  amount of common stock to be issued
    under the Class A Warrant, and the minimum price per share paid
    by Ailouros.
    

   
o   Unless Research Frontiers and Ailouros agree otherwise, the
    amount that Research Frontiers can require Ailouros to buy during
    any three-month period is also limited to 7% of the dollar trading
    volume in Research Frontiers' common stock for the prior three-
    month period, or the three-month period before that, whichever is lower.
    

   
o   The exercise price is the price paid by Ailouros for each share of
     common stock. The exercise price per share is the lesser of (1)
     $15.00 or (2) 92% of the average of the high and low trading
     prices per share for each of the seven trading days before the date
     of exercise, but can never be lower than the floor price set by
     Research Frontiers from time to time.
    

o   The Class A Warrant expires on December 31, 2001.

   
Research Frontiers' decision whether to require Ailouros to exercise the
Class A Warrant may depend upon a variety of factors.  These factors
may include:

o  our need for additional funding
o  when such funding is required
o  the current and anticipated market price for Research Frontiers'common stock
o  the availability and terms of equity funding elsewhere
o  general market conditions.
    

   
Each three-month period begins on the date specified in our put notice to
Ailouros, and ends on the earlier of the date three months later or when
the entire amount of stock which Ailouros  is obligated to buy from us
during such three-month period has been exercised. The three-month
periods may not necessarily be consecutive.
    

   
If we decide to require Ailouros to purchase the amount we specify,
Ailouros would then exercise a portion of  the Class A Warrant during
such three-month period into the number of shares of common stock
which equals the amount specified by us divided by the exercise price in
effect at the time.  During each three-month period in which Ailouros  is
required to buy shares of common stock from Research Frontiers,
Ailouros must send us a notice of exercise.
    

   
Ailouros' obligation to exercise the Class A Warrant and buy common
stock during such three-month period is suspended for so long as the
exercise price is lower than the floor price.  Thus, while the exercise
price is determined by the timing of Ailouros' notice of exercise  within
any three-month period and by the market price for Research Frontiers'
common stock, Research Frontiers sets the ultimate floor price during
such period.
    

   
To give an example of how this would work: If Research Frontiers
wanted to raise $500,000 during the course of the next three months, it
would send Ailouros a put notice specifying that Ailouros must exercise
$500,000 worth of the Class A Warrant during such three month period. 
Research Frontiers' put notice would also contain a floor price under
which the Class A Warrant may not be exercised.  If Ailouros decided to
exercise $100,000 of this amount the next day, it would send Research
Frontiers $100,000 along with a notice of exercise stating that it was
exercising $100,000 of the Class A Warrant and that $400,000 of the
Class A Warrant remains to be exercised during the remainder of the
three-month period.   If the average of the high and low trading prices
per share of Research Frontiers' common stock during the seven days
prior to Ailouros' exercise was $10 per share, and the floor price set by
Research Frontiers was not above $10 per share, then Research Frontiers
would issue to Ailouros 10,000 shares of common stock. During the
remainder of the three-month period, Ailouros would send Research
Frontiers notices of exercise for the remaining $400,000.
    

Class B Warrant

o   The Class B Warrant is initially exercisable into 65,500 shares of
    common stock, but can be exercisable into an additional 65,500
    shares if, among other things, Research Frontiers has not sent
    Ailouros at least three put notices requiring them to buy common
    stock from Research Frontiers under the Class A Warrant by
    December 31, 2001.

o   The exercise price per share of the Class B Warrant is $8.25.

o   The Class B Warrant expires on September 30, 2008.

                       PLAN OF DISTRIBUTION

   
Ailouros Ltd. is underwriting the sale of up to 2,331,000 shares of
common stock of Research Frontiers. Ailouros will buy these shares
from us at the price specified in certain warrants, and may sell these
shares in the open market, or may decide to keep them for investment. 
Ailouros may sell its shares from time to time in the open market at
market prices or at other prices agreed to between Ailouros and the
buyer. Ailouros can act independently of Research Frontiers in making
decisions with respect to the timing, manner and size of each sale.
    

   
Research Frontiers will bear all of the expenses in connection with the
registration of the shares of common stock which is estimated to be
$50,000.
    

   
As an underwriter, Ailouros is subject to certain rules and restrictions,
including an obligation to deliver copies of this prospectus, restrictions
on certain market making activities and stabilizing transactions in the
market.  These regulations, as well as the terms of the warrants, may
limit Ailouros' selling activities. Also, Ailouros, and any person related
to Ailouros or acting in connection with Ailouros, may not:
    

o   sell any shares of Research Frontiers short or enter into any other
    hedging transaction so long as the Class A Warrant or the Class B
    Warrant is outstanding,

   
o   create the lowest reported sales price for the common stock of
    Research Frontiers on any trading day, or
    

   
o   offer to sell shares of Research Frontiers' common stock at a price
    lower than the then prevailing bid price for the common stock.
    

   
Any broker-dealers, agents or underwriters that participate with Ailouros
in the distribution of these shares may also be underwriters. Any
commissions received by them and any profit on the resale of the
common stock purchased by them may be considered underwriting
commissions or discounts under the securities laws.
    

                              EXPERTS

   
The financial statements of Research Frontiers as of December 31, 1997
and 1996, and for each of the years  in the three-year period ended
December 31, 1997, have been incorporated by reference into this
prospectus and in the registration statement in reliance upon the report of
KPMG LLP, independent certified public accountants, which is also
incorporated by reference into this prospectus, and upon the authority of
KPMG LLP as experts in accounting and auditing.
    

                           LEGAL MATTERS

The legality of the securities offered hereby has been passed upon by
Joseph M. Harary, Esq., Research Frontiers' Vice President and General
Counsel.  Mr. Harary holds common stock and options to purchase
common stock granted pursuant to Research Frontiers' 1992 Stock
Option Plan and 1998 Stock Option Plan totaling 356,574 shares.

                         TABLE OF CONTENTS

   
Prospectus Cover Page. . . . . . . . . . . . . . . . . . . . . . .1
Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Available Information. . . . . . . . . . . . . . . . . . . . . . .3
The Company. . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Dividends. . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Use of Proceeds. . . . . . . . . . . . . . . . . . . . . . . . . .7
Selling Stockholder. . . . . . . . . . . . . . . . . . . . . . . .7
Description of Securities. . . . . . . . . . . . . . . . . . . . .9
Plan of Distribution . . . . . . . . . . . . . . . . . . . . . . 11
Experts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Legal Matters. . . . . . . . . . . . . . . . . . . . . . . . . . 12
    
<PAGE>

                              PART II

            INFORMATION NOT REQUIRED IN THE PROSPECTUS

          Item 13.  Disclosure of Commission Position on Indemnification for
          Securities Act Liabilities. 

As described in Item 15, the Certificate of Incorporation of Research
Frontiers provides for the indemnification of certain persons.  Insofar as
indemnification for liabilities arising under the Securities Act of 1933
(the "Act") may be permitted to directors, officers and controlling
persons of the registrant pursuant to the Certificate of Incorporation or
By-Laws of Research Frontiers, or otherwise, the registrant has been
informed that in the opinion of the Securities and Exchange
Commission, such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable.  In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or
controlling person of the registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the
registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against
public policy as expressed in the Act and will be governed by the final
adjudication of such issue.

Item 14.  Other Expenses of Issuance and Distribution.

Estimated expenses relating to the distribution of the Common Stock
registered herein are set forth below.  Such expenses will be paid by
Research Frontiers.

     Registration Fee under the Securities Act of 1933 $   4,743.60
     Nasdaq Listing Fee  . . . . . . . . . . . . . . . .$ 17,500.00
     Accounting fees and expenses  . . . . . . . . . . $   2,000.00
     Legal and due diligence fees and expenses . . . . . $25,000.00
     Miscellaneous expenses. . . . . . . . . . . . . . $     756.40
          Total. . . . . . . . . . . . . . . . . . .    $ 50,000.00

All of the amounts set forth above, except for the filing fees for the
Securities and Exchange Commission, are estimated and subject to
future contingencies.

Item 15.  Indemnification of Directors and Officers.

Article EIGHTH of Research Frontiers' Certificate of Incorporation
provides for the indemnification of Research Frontiers' officers and
directors to the fullest extent permitted by Section 145 of the Delaware
General Corporation Law (the "GCL").

Section 145 of the GCL provides as follows:

     145 Indemnification of Officers, Directors, Employees and Agents;
Insurance
 
     (a) A corporation shall have power to indemnify any person who
was or is a party or is threatened to be made a party to any threatened,
pending or completed action, suit or proceeding, whether civil, criminal,
administrative or investigative (other than an action by or in the right of
the corporation) by reason of the fact that the person is or was a director,
officer, employee or agent of the corporation, or is or was serving at the
request of the corporation as a director, officer, employee or agent of
another corporation, partnership, joint venture, trust or other enterprise,
against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by the
person  in connection with such action, suit or proceeding if the person
acted in good faith and in a manner the person reasonably believed to be
in or not opposed to the best interests of the corporation, and, with
respect to any criminal action or proceeding, had no reasonable cause to
believe the person's conduct was unlawful. The termination of any
action, suit or proceeding by judgment, order, settlement, conviction, or
upon a plea of nolo contendere or its equivalent, shall not, of itself,
create a presumption that the person did not act in good faith and in a
manner which he reasonably believed to be in or not opposed to the best
interests of the corporation, and, with respect to any criminal action or
proceeding, had reasonable cause to believe that the person's conduct
was unlawful.
 
     (b) A corporation shall have the power to indemnify any person
who was or is a party or is threatened to be made a party to any
threatened, pending or completed action or suit by or in the right of the
corporation to procure a judgment in its favor by reason of the fact that
the person is or was a director, officer, employee or agent of the
corporation, or is or was serving at the request of the corporation as a
director, officer, employee or agent of another corporation, partnership,
joint venture, trust, or other enterprise against expenses (including
attorneys' fees) actually and reasonably incurred by the person in
connection with the defense or settlement of such action or suit if the
person acted in good faith and in a manner the person reasonably
believed to be in or not opposed to the best interests of the corporation
and except that no indemnification shall be made in respect of any claim,
issue or matter as to which such person shall have been adjudged to be
liable to the corporation unless and only to the extent that the Court of
Chancery or the court in which such action or suit was brought shall
determine upon application that, despite the adjudication of liability but
in view of all the circumstances of the case, such person is fairly and
reasonably entitled to indemnity for such expenses which the Court of
Chancery or such other court shall deem proper.
 
     (c) To the extent that a present or former director or officer of a
corporation has been successful on the merits or otherwise in defense of
any action, suit or proceeding referred to in subsections (a) and (b) of
this section, or in defense of any claim, issue or matter therein, such
person shall be indemnified against expenses (including attorneys' fees)
actually and reasonably incurred by such person in connection therewith.

     (d) Any indemnification under subsections (a) and (b) of this
section (unless ordered by a court) shall be made by the corporation only
as authorized in the specific case upon a determination that
indemnification of the present or former director, officer, employee or
agent is proper in the circumstances because the person has met the
applicable standard of conduct set forth in subsections (a) and (b) of this
section. Such determination shall be made with respect to a person who
is a director or officer at the time of such determination, (1) by a
majority vote of the directors who are not parties to such action, suit or
proceeding, or (2) by a committee of such directors designated by a
majority vote of such directors, even though less than a quorum, or (3) if
there are no such directors, or if such directors so direct, by independent
legal counsel in a written opinion, or (4) by the stockholders.
 
     (e) Expenses (including attorneys' fees) incurred by an officer or
director in defending any civil, criminal, administrative or investigative
action, suit or proceeding may be paid by the corporation in advance of
the final disposition of such action, suit or proceeding upon receipt of an
undertaking by or on behalf of such director or officer to repay such
amount if it shall ultimately be determined that such person is not
entitled to be indemnified by the corporation as authorized in this
section. Such expenses (including attorneys' fees) incurred by former
directors and officers or other employees and agents may be so paid
upon such terms and conditions, if any, as the corporation deems
appropriate.
 
     (f) The indemnification and advancement of expenses provided by,
or granted pursuant to, the other subsections of this section shall not be
deemed exclusive of any other rights to which those seeking
indemnification or advancement of expenses may be entitled under any
bylaw, agreement, vote of stockholders or disinterested directors or
otherwise, both as to action in such person's official capacity and as to
action in another capacity while holding such office.
 
     (g) A corporation shall have power to purchase and maintain
insurance on behalf of any person who is or was a director, officer,
employee or agent of the corporation, or is or was serving at the request
of the corporation as a director, officer, employee or agent of another
corporation, partnership, joint venture, trust or other enterprise against
any liability asserted against such person and incurred by such person in
any such capacity, or arising out of such person's status as such, whether
or not the corporation would have the power to indemnify such person
against such liability under this section.
 
     (h) For purposes of this section, references to "the corporation"
shall include, in addition to the resulting corporation, any constituent
corporation (including any constituent of a constituent) absorbed in a
consolidation or merger which, if its separate existence had continued,
would have had power and authority to indemnify its directors, officers,
and employees or agents, so that any person who is or was a director,
officer, employee or agent of such constituent corporation, or is or was
serving at the request of such constituent corporation as a director,
officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise, shall stand in the same position under
this section with respect to the resulting or surviving corporation as such
person would have with respect to such constituent corporation if its
separate existence had continued.
 
     (i) For purposes of this section, references to "other enterprises"
shall include employee benefit plans; references to "fines" shall include
any excise taxes assessed on a person with respect to any employee
benefit plan; and references to "serving at the request of the corporation"
shall include any service as a director, officer, employee or agent of the
corporation which imposes duties on, or involves services by, such
director, officer, employee, or agent with respect to an employee benefit
plan, its participants or beneficiaries; and a person who acted in good
faith and in a manner such person reasonably believed to be in the
interest of the participants and beneficiaries of an employee benefit plan
shall be deemed to have acted in a manner "not opposed to the best
interests of the corporation" as referred to in this section.
 
     (j) The indemnification and advancement of expenses provided by,
or granted pursuant to, this section shall, unless otherwise provided
when authorized or ratified, continue as to a person who has ceased to be
a director, officer, employee or agent and shall inure to the benefit of the
heirs, executors and administrators of such a person.

     (k) The Court of Chancery is hereby vested with exclusive
jurisdiction to hear and determine all actions for advancement of
expenses or indemnification brought under this section or under any
bylaw, agreement, vote of stockholders or disinterested directors, or
otherwise.  The Court of Chancery may summarily determine a
corporation' obligation to advance expenses (including attorneys' fees).
 
     Article NINTH of Research Frontiers' Certificate of Incorporation
provides for the elimination of any personal liability for monetary
damages of directors to the Corporation or its stockholders for breach of
fiduciary duty, for negligence or for taking or omitting to take any action
to the fullest extent permitted by Section 102(b) (7) of the GCL. 

     Section 102(b) (7) of the GCL provides as follows:
 
     (b) In addition to the matters required to be set forth in the
certificate of incorporation by subsection (a) of this section, the
certificate of incorporation may also contain any or all of the following
matters:
 
     (7) A provision eliminating or limiting the personal liability of a
director to the corporation or its stockholders for monetary damages for
breach of fiduciary duty as a director, provided that such provision shall
not eliminate or limit the liability of a director (i) for any breach of the
director's duty of loyalty to the corporation or its stockholders, (ii) for
acts or omissions not in good faith or which involve intentional
misconduct or a knowing violation of law, (iii) under section 174 of this
Title, or (iv) for any transaction from which the director derived an
improper personal benefit. No such provision shall eliminate or limit the
liability of a director for any act or omission occurring prior to the date
when such provision becomes effective. All references in this paragraph
to a director shall also be deemed to refer (x) to a member of the
governing body of a corporation which is not authorized to issue capital
stock, and (y) to such other person or persons, if any, who, pursuant to a
provision of the certificate of incorporation in accordance with section
141(a) of this title, exercise or perform any of the powers or duties
otherwise conferred or imposed upon the board of directors by this title.

Item 16.  Exhibits.

   
4.1  Subscription Agreement between Research Frontiers and Ailouros Ltd. dated 
     as of October 1, 1998. (1)
4.2  Class A Warrant between Research Frontiers and Ailouros Ltd.
     dated as of October 1, 1998. (1)
4.3  Class B Warrant between Research Frontiers and Ailouros Ltd.
     dated as of October 1, 1998. (1)
5.1  Opinion re legality of the Common Stock and issuance thereof. (2)
23.1 Consent of KPMG LLP (Filed herewith).
23.2 Consent of Joseph M. Harary (included in Exhibit 5.1)
24.  Power of Attorney.  (1)
- ------------------------------------
(1)  Incorporated by reference to the exhibit filed with Research
     Frontiers' Registration Statement on Form S-3 (No. 333-65219) on
     October 1, 1998.
(2)  Incorporated by reference to the exhibit filed with Research
     Frontiers' Registration Statement on Form S-3 (No. 333-65219) on
     December 24, 1998.
    

Item 17.  Undertakings.

       The undersigned registrant undertakes:

       (1)  To file, during any period in which offers or sales are being
made, a post-effective amendment to this registration statement to
include any material information with respect to the plan of distribution
not previously disclosed in the registration statement or any material
change to such information in the registration statement.

       (2)  That, for the purpose of determining any liability under the
Securities Act of 1933, each such post effective amendment shall be
deemed to be a new registration statement relating to the securities
offered therein, and the offering of securities at that time shall be
deemed to be the initial bona fide offering thereof.
     
       (3)  To remove from registration by means of a post effective
amendment any of the securities being registered which remain unsold at
the termination of the offering.

   
       The undersigned registrant hereby undertakes that, for purposes
of determining any liability under the Securities Act of 1933, each filing
of the registrant's annual report pursuant to section 13(a) or section
15(d) of the Securities Exchange Act of 1934 (and, where applicable,
each filing of any employee benefit plan's annual report pursuant to
section 15(d) of the Securities Act of 1934) that is incorporated by
reference in the registration statement shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.
    
<PAGE>

                            SIGNATURES    

   
     Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-3 and has duly caused this
registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Woodbury, State of New York,
on February 25, 1999. 
    

                              RESEARCH FRONTIERS INCORPORATED
                              (Registrant)
     
                              By:/s/ Robert L. Saxe                             
     
                              Robert L. Saxe, President,Treasurer,
                              Principal Executive, Financial and
                              Accounting Officer.

     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated.

Signature                    Title                         Date

   
/s/ Robert L. Saxe   Chairman of the Board, President   February 25, 1999
    Robert L. Saxe   Treasurer and Director (Principal
                     Executive, Financial and Accounting
                     Officer)

/s/ Robert M. Budin* Director                           February 25, 1999
    Robert M. Budin

/s/ Bernard D. Gold* Director                           February 25, 1999
    Bernard D. Gold

/s/ Joseph M. Harary Director                           February 25, 1999
    Joseph M. Harary
    

*By: /s/ Robert L. Saxe                                                
     Robert L. Saxe as attorney-in-fact

<PAGE>

                                                       EXHIBIT 23.1


                   INDEPENDENT AUDITORS' CONSENT




The Board of Directors
Research Frontiers Incorporated

          We consent to the use of our report dated February 26, 1998
incorporated herein by reference and to the reference to our firm under
the heading "Experts" in the Registration Statement.

   
                  /s/ KPMG LLP
                      KPMG LLP
    


   
Melville,  New York
February 25, 1999
    



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