OMB APPROVAL
                                                                   ------------
                                                          OMB Number: 3235-0145
                                                          ---------------------
                                                      Expires: October 31, 2005
                                                      -------------------------
                                                       Estimated average burden
                                                         hours per response14.9
                                                        -----------------------


                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D/A

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 1 )*

                            NOCOPI TECHNOLOGIES, INC.

                                (Name of Issuer)

                          COMMON STOCK - PAR VALUE .01
                         (Title of Class of Securities)

                                    655212207
                                 (CUSIP Number)

       c/o Dr. Michael Feinstein, 537 Apple St., W. Conshohocken, PA 19428
       -------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                January 19, 2004
             (Date of Event which Requires Filing of This Statement)

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

Note:  Schedules  filed in paper format shall include a signed original and five
copies  of  the  schedule,  including  all exhibits. See Rule 13d-7(b) for other
parties  to  whom  copies  are  to  be  sent.

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

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





CUSIP No.  655212207


________________________________________________________________________________
1    NAME  OF  REPORTING  PERSONS
     I.R.S.  IDENTIFICATION  NOS.  OF  ABOVE  PERSONS  (ENTITIES  ONLY)

        David  Marcus
        Maury  B.  Reiter
        Enid  R.  Rudney
        Michael  B.  Solomon
        Kay  Weinstock
________________________________________________________________________________
2    CHECK  THE  APPROPRIATE  BOX  IF  A  MEMBER  OF  A  GROUP*
                                                                 (a)  [X]
                                                                 (b)  [_]

________________________________________________________________________________
3    SEC  USE  ONLY



________________________________________________________________________________
4    SOURCE  OF  FUNDS*

        David  Marcus  -  PF
        Maury  B.  Reiter  -  PF
        Enid  R.  Rudney  -  PF
        Michael  B.  Solomon  -  PF
        Kay  Weinstock  -  PF
________________________________________________________________________________
5    CHECK  BOX  IF  DISCLOSURE  OF  LEGAL  PROCEEDINGS  IS  REQUIRED
     PURSUANT  TO  ITEMS  2(d)  OR  2(e)                                   [_]



________________________________________________________________________________
6    CITIZENSHIP  OR  PLACE  OF  ORGANIZATION

        All  citizens  of  United  States  of  America






________________________________________________________________________________
               7    SOLE  VOTING  POWER

                        Marcus  -  300,000  shares;
  NUMBER  OF            Reiter  -0- shares
                        Rudney  -0- shares
                        Solomon  - 222,000 shares
   SHARES               Weinstock  -0-  shares*
              _________________________________________________________________
               8    SHARED  VOTING  POWER
BENEFICIALLY
                        3,333,333  shares*
  OWNED  BY
               _________________________________________________________________
    EACH       9    SOLE  DISPOSITIVE  POWER

  REPORTING             Marcus  -  300,000  shares;
                        Reiter  -0- shares;
   PERSON               Rudney  -0- shares;
                        Solomon  - 222,000 shares;
                        Weinstock  -0-  shares*
    WITH       _________________________________________________________________
               10   SHARED  DISPOSITIVE  POWER

                    3,333,333  shares

________________________________________________________________________________
11   AGGREGATE  AMOUNT  BENEFICIALLY  OWNED  BY  EACH  REPORTING  PERSON

                Marcus    -  3,633,333  shares;
                Reiter    -  3,333,333  shares;
                Rudney    -  3,333,333  shares;
                Solomon   -  3,555,333  shares;
                Weinstock -  3,333,333  shares*

________________________________________________________________________________
12   CHECK  BOX  IF  THE  AGGREGATE  AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

        Entrevest  I  Associates,  a  Pennsylvania  general  partnership
[X]     which comprises the individual reporting persons,
        has  warrants  to  acquire  additional  shares  in
        the  Issuer  representing  up to 51% of the total issued and
        outstanding shares  of  Issuer.*
________________________________________________________________________________
13   PERCENT  OF  CLASS  REPRESENTED  BY  AMOUNT  IN  ROW  (11)

        8.39%*

________________________________________________________________________________
14   TYPE  OF  REPORTING  PERSON*

       IN

________________________________________________________________________________
         *This  is  a  joint  filing  by  Marcus,  Reiter,  Rudney,  Solomon and
Weinstock  who  share  voting  and  investment control over all 3,333,333 shares
owned  by  Entrevest  I  Associates,  a  Pennsylvania  general  partnership (the
"Partnership").  The  interest  of  each  of  Reiter,  Rudney  and  Weinstock in
the  securities  described  in  this  Schedule  is  limited  to  the  extent  of
their  respective pecuniary interest in the Partnership. The interest of each of
Marcus  and  Solomon in the securities described  in this  Schedule  is  limited
to  the extent of their respective pecuniary interest in the Partnership, and an
additional 300,000 shares individually owned by Marcus and an additional 222,000
shares  individually  owned  by  Solomon.










CUSIP  Number:  655212207


Item  1:  Common  Stock,  par  value .01 per share of Nocopi Technologies, Inc.,
          537  Apple  Street,  West  Conshohocken,  PA  19428.

Item  2:  This  statement  is  filed  by  Marcus,  Reiter,  Rudney,  Solomon and
Weinstock,  all  of  whom are partners of Entrevest I Associates, a Pennsylvania
general  partnership,  c/o  350  Sentry Parkway, Bldg. 640, P. O. Box 3037, Blue
Bell,  PA  19422.

       (1)      (a)     David  Marcus

                (b)     104  Woodside  Road,  Haverford,  PA  19041

                (c)

                (d)     No  convictions

                (e)     No  proceedings

                (f)     USA

        (2)     (a)     Maury  B.  Reiter

                (b)     303  Pheasant  Hill  Drive  Bryn  Mawr,  PA  19010

                (c)     Attorney  for Kaplin Stewart Meloff Reiter & Stein, P.C.
                        350  Sentry  Parkway,  Bldg.  640
                        P.  O.  Box  3037
                        Blue  Bell,  PA  19422

                (d)     None

                (e)     None

                (f)     USA





(3)     (a)     Enid  R.  Rudney

        (b)     222  Pineridge  Road,  Havertown,  PA  19083

        (c)

        (d)     None

        (e)     None

        (f)     USA

(4)     (a)     Michael  Solomon

        (b)     309  Pheasant  Hill  Drive  Bryn  Mawr,  PA  19010

        (c)     Certified  Public  Accountant  for  Rudney,  Solomon,  Cohen  &
                Felzer,  P.C.  Rosemont,  PA

        (d)     None

        (e)     None

        (f)     USA

(5)     (a)     Kay  Weinstock

        (b)     201,  Landover  Road,  Bryn  Mawr,  PA  19010

        (c)

        (d)     None

        (e)     None

        (f)     USA




Item  3:
All  reporting  persons utilized personal funds for the purpose of acquiring the
securities.

Item  4:
Investment.  In  addition,  the  Partnership  has  certain  warrants  to acquire
additional  shares  of  stock of the Issuer representing up to 51% of the issued
and  outstanding  shares  of the Issuer. There are no plans or proposals for any
other  transactions  as  described  in  Item  4,  Schedule  D.

Item  5:
Based  upon  the  Company's  Quarterly  Report  on Form 10-QSB for the quarterly
period  ended  September 30, 2003, as of November 1, 2003, there were 45,972,241
shares  of  Common  Stock issued and outstanding. As of the close of business on
January  15,  2004,  the  Reporting  Persons  beneficially  own  an aggregate of
3,855,333 shares of Common Stock. This constitutes an aggregate of approximately
8.39%  of  the  outstanding  shares of Common Stock of the Issuer. The Reporting
Persons  have  shared  power  to  vote  and dispose of 3,333,333 of such shares.

In  the  past  sixty days, Solomon sold 100,000 shares on December 15, 2003 at a
price  of  $0.1127; 160,000 shares on December 16, 2003 at a price of $0.105 and
18,000  shares  on  December  18,  2003  at  a  price  of  $0.125.

Other  than the Reporting Persons, no other person is known to have the right to
receive  or  the  power to direct the receipt of dividends from, or the proceeds
from the sale of, the securities referred to in this Schedule.  See also section
12  the  footnote  after  section  14  above.




Item  6:
The  only  arrangement  known  is  the  Partnership  Agreement  of  Entrevest  I
Associates,  to  which  all  of  the  individual  reporting persons are parties.

Item  7.  Material  to  be  filed  as  exhibits:

99.1  Joint  Filing  Agreement  dated as of January 16, 2004, by and among David
Marcus,  Maury  B. Reiter, Enid R. Rudney, Michael B. Solomon and Kay Weinstock.


                                   SIGNATURES

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

                                January 16, 2004


/s/  David  Marcus
----------------------------
David  Marcus


/s/  Maury  B.  Reiter
----------------------------
Maury  B.  Reiter


/s/  Enid  R.  Rudney
----------------------------
Enid  R.  Rudney


/s/  Michael  B.  Solomon
----------------------------
Michael  B.  Solomon


/s/  Kay  Weinstock
----------------------------
Kay  Weinstock




      ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE
                FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).








                                  EXHIBIT INDEX


99.1  Joint  Filing  Agreement  dated  as of January 16, 2004 by and among David
Marcus,  Maury  B. Reiter, Enid R. Rudney, Michael B. Solomon and Kay Weinstock.




                                                                  Exhibit  99.1

                             JOINT FILING AGREEMENT

The  undersigned  agree  that  this  Schedule  13D  filing  herewith relating to
securities  of  NOCOPI  Technologies, Inc. is filed jointly on behalf of each of
the  undersigned  pursuant  to  Rule  13d-1(k).

Dated:  January  16,  2004
       --------------------


/s/  David  Marcus
--------------------------
David  Marcus


/s/  Maury  B.  Reiter
--------------------------
Maury  B.  Reiter


/s/  Enid  R.  Rudney
--------------------------
Enid  R.  Rudney


/s/  Michael  B.  Solomon
--------------------------
Michael  B.  Solomon


/s/  Kay  Weinstock
--------------------------
Kay  Weinstock








                                  END OF FILING