Document:

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                                LICENSE AGREEMENT

 THIS LICENSE AGREEMENT is made as of the lst day of September, 2000, by and
 between NOCOPI TECHNOLOGIES, INC., a corporation duly organized and existing
 under the laws of Maryland with offices at 537 Apple Street, West Conshohocken,
 Pennsylvania, 19428-2903 (hereinafter "NOCOPI"), and WESTVACO BRAND SECURITY,
 INC., a corporation duly organized and existing under the laws of Delaware,
 with offices at 299 Park Avenue, New York, New York 10171, and its affiliates
 as herein defined "hereinafter "LICENSEE").

 WITNESSETH:

          WHEREAS, NOCOPI is the sole owner of a series of patents and patent
 applications dealing with and relating to, among other things: (1) a system
 incorporating activating inks; (2) highlighter pens; (3) counterfeit deterrent
 inks; and (4) information protection systems; AND

         WHEREAS, NOCOPI wishes to enter into a contractual arrangement with
LICENSEE so as to provide LICENSEE with (i) the non-exclusive use of the NOCOPI
TECHNOLOGY for the specific range of products hereinafter defined in Clause 1.06
and (ii) the exclusive use of the NOCOPI TECHNOLOGY for the range of products
hereinafter defined in Clause 1.07.

          NOW, THEREFORE, in consideration of the premises and of the mutual
 agreements, provisions and covenants herein contained, the parties hereto
 hereby agree as follows:

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                                     Page 2

                             ARTICLE I - DEFINITIONS

 1.01     As used herein, the term "AFFILIATES" shall mean any corporation which
          is owned by or controlled to the extent of at least fifty percent
          (50%) of the issued and voting stock of such corporation by either
          Party.

 1.02     For the purposes of this Agreement, "ADDITIONAL EARNINGS" shall mean
          that portion of "LICENSEE'S" net earnings during a ROYALTY YEAR, net
          of all costs as determined by standard accounting methods, derived
          from the sale by LICENSEE of NON-EXCLUSIVE PRODUCTS and EXCLUSIVE
          PRODUCTS which is attributed solely to incorporation of NOCOPI
          TECHNOLOGY.

 1.03     As used herein, the term "DESIGN RIGHTS" shall mean design rights
          (whether registered or unregistered) which are owned or which may
          hereafter be owned by NOCOPI and which relate to the NOCOPI
          TECHNOLGY.

 1.04     The "EFFECTIVE DATE" of this Agreement shall be the date first
          hereinabove written.

 1.05     As used herein, "EUROPE" shall mean all countries as are encompassed
          within the area bounded by the Atlantic Ocean on the West, the Arctic
          Ocean on the North, the Mediterranean and its annexes on the South and
          the fifty (50) longitude on the East, and including also all countries
          or territories comprised in the geographic territories of the area
          previously occupied by the former Union of Soviet Socialist Republics,
          as well as overseas territories and departments of any country in
          Europe.

 1.06     As used herein, the term "EXCLUSIVE PRODUCTS" shall mean only those
          products which incorporate NOCOPI TECHNOLOGY during the manufacturing
          of paperboard and paper products.

 1.07     As used herein, the term "NOCOPI TECHNOLOGY" shall mean the technology
          furnished by NOCOPI dealing with and relating to, among other
          things: (1) a system

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                                     Page 3

          incorporating activating inks; (2) highlighter pens; (3) counterfeit
          deterrent inks; and (4) information protection systems; and (5) all
          know-how, unpatented technology, inventions, methods, patents or
          processes relating to the NOCOPI TECHNOLOGY now or which hereafter
          during the term of this agreement may be in the possession, custody or
          control of NOCOPI.

 1.08     As used herein, the term "NOCOPI REPORT" shall mean a written report,
          which shall list the sale price and customer (or customer code) rather
          than actual name of all NON-EXCLUSIVE PRODUCTS and EXCLUSIVE PRODUCTS
          sold by the LICENSEE during the preceding ROYALTY PERIOD.

 1.09     As used herein, the term "NON-EXCLUSIVE PRODUCTS" shall mean and shall
          be restricted to products derived from printing, coating or coding
          applications and which incorporate NOCOPI TECHNOLOGY.

 1.10     As used herein, the term "QUARTERLY ROYALTY PERIOD" shall mean the
          period of three (3) calendar months commencing on the Effective Date,
          and every three (3) month period thereafter during the term of this
          Agreement.

 1.11     As used herein, the term "ROYALTY PERIOD" shall mean a period of
          twelve (12) calendar months commencing on the Effective Date, and
          every twelve (12) month period thereafter as long as this Agreement
          remains in effect.

 1.12     As used herein, the term "TERM" shall mean the time period
          contemplated by Article V1.

 1.13.    As used herein the term "TERRITORY" shall mean the world.

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                              ARTICLE II - LICENSE

 2.01     NOCOPI hereby grants to the LICENSEE, the exclusive right to market,
          promote, sell and manufacture EXCLUSIVE PRODUCTS in the TERRITORY.

 2.02     NOCOPI also grants to the LICENSEE the non-exclusive right to market,
          promote, sell and manufacture NON-EXCLUSIVE PRODUCTS in the TERRITORY.

 2.03     The LICENSEE will within thirty (30) days of the Effective Date, and
          on each anniversary date thereof during the term of this Agreement
          provide NOCOPI in good faith with an estimate of the ADDITIONAL
          EARNINGS that the LICENSEE expects will be realized from sales in
          EUROPE during the ensuing twelve month period, it being understood
          that such estimate shall not be deemed a representation and/or
          warranty by the LICENSEE as to its attainment.

 2.04     NOCOPI undertakes that it will make complete and full disclosure to
          the LICENSEE of all of the NOCOPI TECHNOLOGY required to enable the
          LICENSEE to market, sell and distribute EXCLUSIVE and NON-EXCLUSIVE
          PRODUCTS in the TERRITORY.

          2.04.1   the Licenses granted in, Articles 2.01 and 2.02 shall
                   specifically include the right to sub-license an unaffiliated
                   third party, provided:

                   (i)      that all such sub-licensees have executed contracts
                            with NOCOPI which contain secrecy and
                            confidentiality provisions contemplated by
                            Article IX; and

                   (ii)     that the LICENSEE shall have delivered to NOCOPI
                            within a period of ten (10) business days of
                            execution a copy of each contract.

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                                     Page 5

 2.05     Notwithstanding the provisions of clauses 2.01 and 2.02 hereof but in
          addition thereto, NOCOPI agrees and acknowledges that as long as this
          Agreement remains in effect, that NOCOPI will treat as exclusive
          customers of the LICENSEE all customers to whom the LICENSEE may have
          sold NON-EXCLUSIVE PRODUCTS during the term of this Agreement. The
          LICENSEE recognizes and agrees that it will include all such sales in
          its report of ADDITIONAL EARNINGS.

                      ARTICLE III - SUPPLY OF RAW MATERIALS

 3.01     NOCOPI agrees with the LICENSEE that NOCOPI shall provide all
          necessary deterrent inks and dyes required by the LICENSEE for the
          EXCLUSIVE PRODUCTS and NON-EXCLUSIVE PRODUCTS the whole at NOCOPI'S
          cost plus fifteen percent(15%). LICENSEE will receive a schedule of
          sort by the EFFECTIVE DATE. No change will be made except upon written
          notice given to LICENSEE at least thirty (30) days prior to the
          effective date of such change.

 3.02     The LICENSEE shall pay NOCOPI for the costs of all such inks within a
          period of forty-five (45) days following the date of invoice.

                           ARTICLE VI - CONSIDERATION

 4.01     In consideration of the rights granted to LICENSEE under this
          Agreement for the NOCOPI TECHNOLOGY, LICENSEE agrees to pay to NOCOPI
          royalties in accordance with the clauses hereinafter following.

 4.02     For each ROYALTY PERIOD commencing on September 1, 2000, LICENSEE
          shall pay to NOCOPI at the times and in the manner set out in clauses
          4.03 and 5.02 hereof a minimum annual royalty fee equal to the greater
          of One Hundred Thousand Dollars ($100,000.00) or five percent (5%) of
          the ADDITIONAL EARNINGS. In the event that one or more NOCOPI
          TECHNOLOGIES are incorporated by the LICENSEE into NON-EXCLUSIVE
          PRODUCTS and EXCLUSIVE PRODUCTS the Royalty Fee

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                                     Page 6

          shall be reduced to two and one-half percent (2 1/2%) for all such
          products utilizing NOCOPI TECHNOLOGY.

 4.03     The minimum annual royalty fee of One Hundred Thousand Dollars
          ($100,000.00) shall be paid by the LICENSEE to NOCOPI by way of twelve
          (12) equal and consecutive payments of Eight Thousand Three Hundred
          and Thirty-Three Dollars ($8,333.00), each month commencing September
          1, 2000 and thereafter continuing on the first day of each month
          during the term of the Agreement. Each such payment shall reflect a
          credit for any royalty payment due and paid at the same date or
          previously paid on account of the same year.

                         ARTICLE V - RECORDS AND REPORTS

 5.01     LICENSEE agrees to keep accurate and complete records in sufficient
          detail to record the ADDITIONAL EARNINGS for each of EUROPE and the
          rest of the TERRITORY during each QUARTERLY ROYALTY PERIOD or during
          each ROYALTY PERIOD, as the case may be, so that the amount of royalty
          payments due to NOCOPI may be ascertained.

 5.02     LICENSEE shall deliver to NOCOPI.

          (i)      not later than forty-five (45) days after the close of each
                   ROYALTY PERIOD during the TERM; and

          (ii)     commencing with the QUARTERLY ROYALTY PERIOD beginning on
                   September 1, 2000, not later than forty-five (45) days after
                   the close of each QUARTERLY ROYALTY PERIOD; and

          (iii)    after the termination of this Agreement;

          A statement specifying the information referred to in clause 5.01
          hereof and in such form and containing such details as NOCOPI
          reasonably requires substantiating LICENSEE'S ADDITIONAL EARNINGS in
          each of EUROPE and the rest of the

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          TERRITORY during the applicable period. LICENSEE shall, at the same
          time as providing the said statement, also remit the amount of any
          royalties due in accordance with the statement. The receipt or
          acceptance by NOCOPI of any statements furnished pursuant to this
          Agreement or any royalty payments paid hereunder (or the cashing of
          any cheques paid hereunder) shall not preclude NOCOPI from questioning
          the correctness thereof at any time and in the event that
          inconsistencies or mistakes are discovered in such statements or
          payments, they shall be rectified and appropriate payments shall
          immediately by made by LICENEE or credit given to LICENSEE by NOCOPI,
          as may be appropriate.

 5.03     If LICENSEE fails to deliver such a statement to NOCOPI within
          forty-five (45) days of the end of the particular period, NOCOPI, in
          addition to any other rights and on not less than ten (10) days prior
          notice to LICENSEE, may employ an independent auditor qualified to
          practice and practicing in the United States, to examine such books
          and records of LICENSEE as may be necessary to enable him to report
          upon and certify the amount of ADDITIONAL EARNINGS and LICENSEE will
          promptly pay to NOCOPI the cost thereof as additional royalty.

 5.04     LICENSEE agrees, upon request by NOCOPI, to permit an auditor
          qualified to practice and practicing in the United States, who may be
          designated by either party, to have access during normal business
          hours at least once annually on ten (10) business days' notice, to
          audit such books and records as may be necessary to determine the
          correctness of any report or payment made under this Agreement. On
          request, with reasonable notice, LICENSEE will make available at its
          offices, all relevant books of account and records.

 5.05     If any audit reveals a discrepancy between the amount payable to
          NOCOPI and the amounts actually paid to NOCOPI and if that discrepancy
          exceeds five percent (5%) of the amounts payable as determined in the
          audit, LICENSEE shall pay all of NOCOPI'S reasonable costs associated
          with such audit. Otherwise, all costs associated with any audit shall
          be the responsibility of NOCOPI.

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 5.06     LICENSEE shall be entitled to receive copies of all audit reports
          prepared pursuant to this Article V.

               ARTICLE VI - MARKING AND USE OF NOCOPI'S TRADEMARK

 6.01     If LICENSEE and/or any of its sublicensees utilize the trademark
          "NOCOPI" or any other trademark owned by NOCOPI in association with
          the NOCOPI TECHNOLOGY, they shall do so only in respect of products
          the quality and specifications of which have been previously approved
          of by NOCOPI, and LICENSEE shall provide NOCOPI with adequate
          opportunity so that NOCOPI may satisfy itself that such quality and
          specifications are maintained during continuance of such use. Before
          using such trademark in any area, LICENSEE and/or its sublicensees
          shall be responsible for acquainting themselves with and informing
          NOCOPI of all licensing formalities, user registration and quality
          control requirements applicable in such area, which are reasonably
          necessary to the protection of NOCOPI'S interest in the trademark, and
          NOCOPI shall co-operate with LICENSEE and/or its sublicensees at their
          respective expense in fulfilling such requirements, it being
          understood that in any area where NOCOPI takes no steps to register
          the trademark, there shall be no such obligation on LICENSEE and/or
          its sublicensees in respect of such requirements other than quality
          control. In the event that any good will shall accrue to LICENSEE in
          the trademark "NOCOPI" or any other trademark of NOCOPI in any area,
          LICENSEE and/or its sublicensees will agree in writing to assign such
          goodwill to NOCOPI on termination of this license or upon request by
          NOCOPI to this extent that such can be accomplished under generally
          accepted accounting principles. Nothing herein shall be deemed to
          prevent Westvaco from selling NON-EXCLUSIVE and EXCLUSIVE PRODUCTS
          under its own tradenames.

                       ARTICLE VII - TERM AND TERMINATION

 7.01     This Agreement shall commence on September 1, 2000 and shall continue
          until August 31, 2001 (unless terminated as hereinafter provided); and
          thereafter from year to year, unless and until terminated as provided
          for in Clause 7.02.1 hereof.

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                                     Page 9

 7.02     LICENSEE and NOCOPI shall have the option of terminating this
          Agreement in the following circumstances:

          7.02.1   by not less than ninety (90) days' notice, in advance and in
                   writing, given by either Party to the other, prior to August
                   31, 2001 or, in the event that this Agreement continues after
                   the first 12-month period, by one hundred and twenty (120)
                   days' notice, in advance and in writing, given by either
                   Party to the other.

          7.02.2   if a Party shall make any composition with creditors or go
                   into liquidation whether voluntary or compulsory (other than
                   for the purpose of solvent amalgamation or reconstruction) or
                   analogous proceedings shall be commenced, then the other
                   Party may, by notice in writing, forthwith terminate this
                   Agreement.

                      ARTICLE VIII - ADDITIONAL OBLIGATIONS

 8.01     NOCOPI will provide, at the expense of the LICENSEE, such technical
          training for personnel of the LICENSEE as may be required in order to
          acquaint the LICENSEE with the NOCOPI TECHNOLOGY. For these purposes,
          "expense" shall include travel costs only and not include salary or
          other compensation or the cost of benefits for NOCOPI personnel
          whether employed by NOCOPI or retained by NOCOPI on any other basis.

 8.02     The LICENSEE shall immediately advise NOCOPI of any legal notices
          served on the LICENSEE which might affect NOCOPI, handle promptly all
          correspondence from NOCOPI, and assist and co-operate with NOCOPI's
          officers, research and sales personnel during their trips to the
          facilities of the LICENSEE and/or the suppliers of the LICENSEE.

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             ARTICLE IX - LIMITATIONS OF LIABILITY AND HOLD HARMLESS

 9.01     Each Party expressly saves and holds the other Party, and any
          AFFILIATES, harmless from any and all liability of any kind or nature
          whatsoever to customers and to other third parties which may arise
          from its negligent acts or omissions.

 9.02     NOCOPI warrants that the licenses and rights granted pursuant to this
          Agreement, when used as intended and without unauthorized
          modification, do not violate any right or infringe any patent,
          copyright or other protection of intellectual property belonging to
          any third party. NOCOPI agrees to defend, indemnify, and hold harmless
          Westvaco and Westvaco's principals, directors, officers, employees,
          and/or agents from and against any and all liabilities, penalties,
          claims, demands, suits, and causes of action of any nature whatsoever,
          whether groundless or otherwise, and any and all damages, costs and
          expenses sustained or incurred (including cost of defense, settlement,
          and reasonable attorneys' fees), asserted by or on behalf of any
          person or entity arising out of any claim that any of the licenses or
          rights granted by NOCOPI pursuant to this Agreement, or the NOCOPI
          TECHNOLOGY applied pursuant to this Agreement, infringe any patent,
          copyright or protection of intellectual property generally, whether
          such claim is valid or baseless and wherever it may arise. This
          undertaking shall expressly survive any termination of this Agreement

 9.03     Except as herein expressly stated, there are no warranties, expressed
          or implied, by operation of law or otherwise, for any item furnished
          hereunder. NOCOPI disclaims any implied warranty or merchantability or
          fitness for a particular purpose. In no event shall either Party, or
          its AFFILIATES, be liable for any incidental, indirect or
          consequential damages in connection with or arising out of this
          Agreement.

                           ARTICLE X - CONFIDENTIALITY

10.01     The LICENSEE shall keep secret and confidential, the NOCOPI TECHNOLOGY
          and/or DESIGN RIGHTS made available to it by NOCOPI and shall not
          disclose the same other than to those Directors and employees of the
          LICENSEE or any

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          AFFILIATE of the LICENSEE who may be deemed to have a legitimate
          reason to be party to the NOCOPI TECHNOLOGY and/or DESIGN RIGHTS.

 10.02    NOCOPI shall keep secret and confidential, any information which the
          LICENSEE passes to NOCOPI and not disclose the same except to its own
          employees as necessary to carry out the purposes of this Agreement.

 10.03    The obligations of secrecy undertaken by both Parties pursuant to this
          Article X, shall not apply to information which:

          10.03.1          is already, or which subsequently becomes generally
                           known to the public through no fault of the
                           recipient: or

          10.03.2          the recipient can demonstrate was known to the
                           receipt prior to the date disclosed. For the purposes
                           hereof, that which the recipient can demonstrate was
                           known will be that which the receipt can establish by
                           written evidence was known to it at the date
                           disclosed; or

          10.03.3          is received from a third party, provided that such
                           third party is lawfully entitled to disclose the
                           same; or

          10.03.4          is disclosed in any patent or patent application
                           which may publish.

 10.04    The obligations of secrecy pursuant to this Article (X) shall expire
          on the tenth anniversary of the termination of this Agreement as
          hereinabove provided.

 10.05    The provisions of this Article (X) contain the entire understanding
          and agreement between the Parties with respect to matters dealing with
          confidentiality and cannot be

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                                     Page 12

          amended, modified or supplanted in any respect except by a subsequent
          written agreement entered into by both parities.

                            ARTICLE XI - IMPROVEMENTS

 11.01    During the term of this Agreement, the LICENSEE shall disclose to
          NOCOPI any improvements to the NOCOPI TECHNOLOPY and/or DESIGN RIGHTS
          which the LICENSEE may discover or which comes into its possession.
          Any such improvements shall, from the time of the LICENSEE's
          knowledge, conception or development, be the property of NOCOPI. Upon
          request by NOCOPI, the LICENSEE shall execute and deliver to NOCOPI
          such instrument as NOCOPI may reasonably request in order to achieve
          such industrial or intellectual property status as NOCOPI shall deem
          appropriate to perfect the assignment of the rights so granted by the
          LICENSEE to NOCOPI.

                                 ARTICLE XII - MISCELLANEOUS

 12.01    Neither the LICENSEE nor NOCOPI shall be in default under this
          Agreement nor be liable for any failure to perform or for any delay in
          performance resulting from any cause beyond its/their reasonable
          control or due to compliance with any regulations, orders or act, of
          any federal, provincial, state or municipal government, or any
          department or agency thereof, civil or military authority, acts of
          God, acts or omissions of the other party, fires, floods or weather,
          strikes or lockouts, factory shutdowns, embargoes, wars, hostilities
          or riots, delays or shortages in transportation or inability to obtain
          labor, manufacturing facilities or material.

 12.02    Each of the Parties shall bear all taxes imposed on each of them as a
          result of the existence or operation of this Agreement including, but
          not restricted to, any tax on or measured by any payment required to
          be made by it hereunder, any registration tax, any tax imposed with
          respect to the granting of, or transfer of, licenses or other rights
          or payments hereunder.

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                                     Page 13

 12.03    This Agreement may be varied or amended only by the written agreement
          of the Parties hereto through their duly authorized officers or
          representatives.

 12.04    In any case where any notice or other communication is required or
          permitted to be given hereunder, such notice or communication shall be
          in writing and (I) personally delivered; (ii) sent by postage prepaid
          registered mail, or (iii) transmitted by telex or facsimile to the
          Parties at the addresses first hereinbefore listed or to such other
          addresses as the Parties may notify each other.

 12.05    The relationship between the Parties shall be governed by the terms of
          this Agreement and shall not extend to other activities, transactions
          or contracts. Neither Party is in any way the legal representative or
          agent of, nor has nay authority to assume or create any obligation on
          behalf of, the other Party. The LICENSEE shall make no guarantees,
          warranty or representation with respect to the EXCLUSIVE PRODUCTS or
          to the NON-EXCLUSIVE PRODUCTS.

 12.06    If any provision of this Agreement is held illegal in a judicial
          proceeding, such provision shall be severed from this Agreement and
          shall be inoperative. The Parties shall use their best endeavors to
          replace the severed provision with a new provision which is not
          illegal and which follows the principles of the severed provision as
          closely as is legally possible. The remainder of this Agreement shall
          remain binding on the Parties hereto.

 12.07    No waiver of breach of any of the provisions of this Agreement shall
          be construed to be a waiver of any succeeding breach of the same or
          any other provision.

 12.08    This Agreement may be executed in any number of counterparts. Any
          single counterpart or set of counterparts signed, in either case, by
          the Parties hereto, shall constitute a full and original Agreement for
          all purposes.

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                                     Page 14

 12.09    The descriptive headings of the several articles of this Agreement are
          inserted for convenience only and do not constitute a part of this
          Agreement.

 12.10.   The preamble hereof shall be deemed to form part of this Agreement for
          all purposes.

                          ARTICLE XIII - SUPPLY OF INK

 13.01    NOCOPI agrees that during the tendency of this Agreement that it will
          supply ink proprietary to NOCOPI at NOCOPI's cost plus fifteen percent
          (15%). The obligation to supply such ink shall apply only for that
          quantity of ink that is ordered by a purchase order emanating from the
          LICENSEE and which is received by NOCOPI at least thirty (30) days
          prior to the requested delivery date.

 13.02    NOCOPI further agrees that upon request by the LICENSEE that it will
          provide statements justifying its cost of production for the NOCOPI
          ink.

                           ARTICLE XIV - GOVERNING LAW

 14.01    This Agreement shall be governed by the laws of Pennsylvania. Any
          action to enforce any provision of this Agreement shall be brought in
          an appropriate court in Pennsylvania and both parties hereby consent
          to the jurisdiction of Pennsylvania.

                     ARTICLE XV - BINDING EFFECT ASSIGNMENT

 15.01    This Agreement may not be assigned by either Party without the written
          consent of the other Party (such consent not to be unreasonably
          withheld) except that the LICENSEE may assign this Agreement to an
          AFFILIATE without consent. No assignment of this Agreement shall be
          valid unless and until all of the obligations of the assigning party
          have been assumed, in writing, by the assignee. When duly assigned in
          accordance with the foregoing, this Agreement shall be binding upon
          and inure to the benefit of the assignee. Any attempted assignment in
          contravention of this Agreement shall be void.

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                                     Page 15

                            ARTICLE XVI - ARBITRATION

 16.01    In the event of any dispute, difference or question arising between
          the Parties in connection with this Agreement, or any clause or the
          construction thereof, or the rights, duties or liabilities of either
          Party, which cannot be amicably resolved by the Parties, then and in
          every such case, unless the Parties concur in the appointment of a
          single arbitrator, the matter of difference shall be referred to three
          (3) arbitrators, one to be appointed by each Party, and the third to
          be nominated by the two so selected by the Parties, or if they cannot
          agree on a third, by a presiding judge of the Superior Court of the
          State of Pennsylvania.

 16.02    In the event that either Party, within thirty (30) days of any
          notification made to it of the demand for arbitration by the other
          Party, shall not have appointed its arbitrator, such arbitrator shall
          be appointed by a presiding judge of the Superior Court of
          Pennsylvania. Arbitration shall take place at Philadelphia. The
          arbitrators must base their decision on this Agreement and their
          decision shall be binding on both parties.

          IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to
 be executed by their respective representatives thereunto duly authorized as of
 the date first hereinabove written.

                                              NOCOPI TECHNOLOGIES, INC.

                                              per:/s/
                                                  ------------------------------
                                                  Michael Feinstein, M.D.
                                                  Chairman

                                              WESTVACO BRAND SECURITY, INC.

                                              per:/s/
                                                  ------------------------------
                                                  Stanley Gene Hart
                                                  President<PAGE>

                                  EXHIBIT 10.15

Agreement dated December 19th, 2000 by and between NOCOPI TECHNOLOGIES, INC., a
corporation organized and existing under the laws of Maryland, with offices at
537 Apple Street, West Conshohocken, Pennsylvania 19428-2903 ("NOCOPI"), and
WESTVACO BRAND SECURITY INC., a corporation organized and existing under the
laws of Delaware, with offices at One High Ridge Park, Stamford, Connecticut
06905, and its AFFILIATES ("LICENSEE").

1. This Agreement amends a certain License Agreement (the "License Agreement")
   between the parties dated as of September 1, 2000.

   Section 1.13 is amended to state in its entirely as follows:

   Section 1.13 As used here there term "TERRITORY" shall mean the world with
   the exclusion of EUROPE as defined in the License Agreement.

   Section 4.03 is deleted in its entirely and all payments made to date under
   this section shall be returned to LICENSEE.

   Sections 7.01 and 7.02.1 are amended to set forth in their entirety are
   follows:

         7.01     This Agreement shall commence on September 1, 2000 and shall
                  continue until August 31, 2003 (unless terminated as
                  hereinafter provided); and thereafter from year to year,
                  unless and until terminated as provided for in Clause 7.02.1
                  hereof.

         7.02     LICENSEE and NOCOPI shall have the option of terminating this
                  Agreement in the following circumstances:

         7.02.1   After August 31, 2003, by one hundred and twenty (120) days'
                  notice, in advance and in writing, given by either Party to
                  the other.

<PAGE>

2. If at any time during the term of the License Agreement, NOCOPI becomes able
   to grant LICENSEE the exclusive right to market, promote, sell and
   manufacture EXCLUSIVE PRODUCTS throughout the world, and the non-exclusive
   right to market, promote, sell and manufacture NON-EXCLUSIVE PRODUCTS,
   throughout the world, then TERRITORY shall be immediately redefined to
   include EUROPE, and NOCOPI will take all necessary actions to confirm such
   right.

   IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed by their respective representatives thereunto duly authorized as of the
date first hereinabove written.

                                       NOCOPI TECHNOLOGIES, INC.

                                       per:  /s/
                                             -----------------------------------
                                             Michael Feinstein, M.D.
                                             Chairman

                                       WESTVACO BRAND SECURITY INC.

                                       per: /s/
                                            ------------------------------------
                                            Stanley Gene Hart
                                            President

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