<PAGE> 1
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
-----------------------------
OMB APPROVAL
-----------------------------
SCHEDULE 13G OMB Number 3235-0145
Expires: October 31, 1997
Estimated average burden
hour per response...... 14.90
-----------------------------
Under the Securities Exchange Act of 1934
(Amendment No. 2 )*
-----
Proteon, Inc,
- --------------------------------------------------------------------------------
(Name of Issuer)
Common Stock, $.01 Par Value Per Share
- --------------------------------------------------------------------------------
(Title of Class of Securities)
743700106
--------------------
(CUSIP Number)
*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 the
disclosures provided in a prior cover page.
The information required in 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 ("Act") 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).
<PAGE> 2
- ---------------------------- ------------------------------
CUSIP NO. 743700106 13G Page 2 of 5 Pages
--------------- --- ---
- ---------------------------- ------------------------------
================================================================================
1 NAME(S) OF REPORTING PERSON(S)
S.S, OR I,R,S. IDENTIFICATION NO(S). OF ABOVE PERSON(S)
Howard C. Salwen
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP
U.S.A.
================================================================================
NUMBER OF 5 SOLE VOTING POWER
SHARES 1,019,564*
------------------------------------------------
BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY -O-
------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING 894,400
------------------------------------------------
PERSON 8 SHARED DISPOSITIVE POWER
WITH -0-
================================================================================
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,019,564 *
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
6.6%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
================================================================================
<PAGE> 3
- ---------------------------- ------------------------------
CUSIP NO. 743700106 13G Page 3 of 5 Pages
--------------- --- ---
- ---------------------------- ------------------------------
Item l(a) Name of Issuer
--------------
Proteon, Inc.
Item l(b) Address of Issuer's Principal Executive Offices
-----------------------------------------------
9 Technology Drive
Westborough, MA 01581
Item 2(a) Name of Person Filing
---------------------
Howard C. Salwen
Item 2(b) Address of Principal Business Office or, if none, Residence
-----------------------------------------------------------
9 Technology Drive
Westborough, MA 01581
Item 2(c) Citizenship
-----------
U.S.A.
Item 2(d) Title of Class of Securities
----------------------------
Common Stock, $.01 Par Value Per Share
Item 2(e) CUSIP Number
------------
743700106
Item 3. If this statement is filed pursuant to Rules 13d-l(b), or 13d-2(b),
-------------------------------------------------------------------
check whether the person filing is a
------------------------------------
(a) [ ] Broker or Dealer registered under Section 15 of the Act
(b) [ ] Bank as defined in Section 3(a)(6) of the Act
(c) [ ] Insurance Company as defined in Section 3(a)(19) of the Act
(d) [ ] Investment Company registered under Section 8 of the Investment
Company Act
(e) [ ] Investment Adviser registered under Section 203 of the
Investment Advisers Act of 1940
(f) [ ] Employee Benefit Plan, Pension Fund which is subject to the
provisions of the Employee Retirement Income Security Act of 1974
or Endowment Fund; see sec.240.13d-l(b)(1)(ii)(F)
<PAGE> 4
- ---------------------------- ------------------------------
CUSIP NO. 743700106 13G Page 4 of 5 Pages
--------------- --- ---
- ---------------------------- ------------------------------
(g) [ ] Parent Holding Company, in accordance with sec.240.13d-l(b)(1)(ii)(G)
(h) [ ] Group, in accordance with sec.240.13d-l(b)(1)(ii)(H)
Item 4. Ownership
---------
(a) Amount Beneficially Owned:
1,019,564*
(b) Percent of Class:
6.6%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote:
1,019,564*
(ii) shared power to vote or to direct the vote:
-0-
(iii) sole power to dispose or to direct the disposition of:
894,400
(iv) shared power to dispose or to direct the disposition of:
-0-
Item 5. Ownership of Five Percent or Less of a Class
--------------------------------------------
n/a
Item 6. Ownership of More than Five Percent on Behalf of Another Person
---------------------------------------------------------------
n/a
Item 7. Identification and Classification of the Subsidiary Which Acquired
------------------------------------------------------------------
the Security Being Reported on By the Parent Holding Company
------------------------------------------------------------
n/a
Item 8. Identification and Classification of Members of the Group
---------------------------------------------------------
n/a
Item 9. Notice of Dissolution of Group
------------------------------
n/a
<PAGE> 5
- ---------------------------- ------------------------------
CUSIP NO. 743700106 13G Page 5 of 5 Pages
--------------- --- ---
- ---------------------------- ------------------------------
Item 10. Certification
-------------
By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired in the
ordinary course of business and were not acquired for the purpose
of and do not have the effect of changing or influencing the
control of the issuer of such securities and were not acquired in
connection with or as a participant in any transaction having
such purposes or effect.
Signature
---------
After reasonably inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
DATE: 4/25/97 BY: /s/ Howard C. Salwen
--------------------------- ----------------------------------------
Howard C. Salwen
* Reporting person disclaims beneficial ownership of 125,164 shares held in
irrevocable trust.