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 13-D Under the Securities Exchange Act of 1934 (Amendment No. ___ )* NOCOPI TECHNOLOGIES, INC. (Name of Issuer) COMMON STOCK - PAR VALUE .01 (Title of Class of Securities) 655212207 (CUSIP Number) c/o Dr. Michael Feinstein, 9C Portland Road, West Conshohocken, PA 19428 ------------------------------------------------------------------------ (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) July 5, 2005 (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 -0- shares; Reiter -0- shares; NUMBER OF Rudney -0- shares; Solomon -0- shares; SHARES Weinstock -0- shares* _________________________________________________________________ 8 SHARED VOTING POWER BENEFICIALLY 2,518,599 shares* OWNED BY _________________________________________________________________ EACH 9 SOLE DISPOSITIVE POWER REPORTING Marcus -0- shares; Reiter -0- shares; Rudney -0- shares; Solomon -0- shares; PERSON Weinstock -0- shares* WITH _________________________________________________________________ 10 SHARED DISPOSITIVE POWER 2,518,599 shares ________________________________________________________________________________ 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON Marcus - 2,518,599 shares; Reiter - 2,518,599 shares; Rudney - 2,518,599 shares; Solomon - 2,518,599 shares; Weinstock - 2,518,599 shares* ________________________________________________________________________________ 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES* ________________________________________________________________________________ 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 4.97%* ________________________________________________________________________________ 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 2,518,599 shares owned by Entrevest I Associates, a Pennsylvania general partnership (the "Partnership"). The interest of each of Marcus, Reiter, Rudney, Solomon and Weinstock in the securities described in this Schedule is limited to the extent of their respective pecuniary interest in the Partnership. ------ SCHEDULE 13-D ------------- Re: Nocopi Technologies, Inc. CUSIP Number: 655212207 Item 1: Common Stock, par value .01 per share of Nocopi Technologies, Inc., 9C Portland Road, 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: Michael B. Solomon sold 10,000 shares of Nocopi Technologies Inc/MD/ on July 5, 2005. All reporting persons utilized personal funds for the purpose of acquiring the securities. Item 4: The sale of the securities described in Item 3 reduces the percentage ownership of Entrevest I Associates in the subject company to under 5 percent. Item 5: Based upon the Company's Quarterly Report on Form 10-QSB for the quarterly period ended March 31, 2005, as of May 1, 2005, there were 50,586,181 shares of Common Stock issued and outstanding. As of the close of business on July 5, 2005, the Reporting Persons beneficially own an aggregate of 2,518,599 shares of Common Stock. This constitutes an aggregate of approximately 4.97% of the outstanding shares of Common Stock of the Issuer. The Reporting Persons have shared power to vote and dispose of all of such shares. 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: None. 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. July 31, 2005 /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 END OF FILING