Patent Term Extended Under 35 U.S.C.   156

   Certificates extending the term of the following patents were issued
on April 21, 1997:

   U.S. Patent No. 4,514,390; Granted April 30, 1985, to Ernst A. H.
Friedheim; Owner of Record: The Rockefeller University; Title:
Melaminylthioarsenites; Classification: 514/184; Product Trade Name:
IMMITICIDE; Original Expiration Date: April 30, 2002; Term Extended:
1,632 days.

   U.S. Patent No. 4,525,358; Granted June 25, 1985, to Eugene Baltes, et.
al.; Owner of Record: UCB Pharma, Inc.; Title:
2-[4-(Diphenylmethyl)-1-Piperazinyl]-Acetic Acids and Their Amides;
Classification: 514/255; Product Trade Name: ZYRTEC; Original
Expiration Date: June 25, 2002; Term Extended: 5 years.

   U.S. Patent No. 4,621,077; Granted November 4, 1986, to Sergio Rosini,
et. al.; Owner of Record: Istituto Gentili S.p.A.; Title:
Pharmacologically Active Biphosphonates, Process for the Preparation
Thereof and Pharmaceutical Compositions Therefrom; Classification:
514/108; Product Trade Name: FOSOMAX; Original Expiration Date:
November 4, 2003; Term Extended: 1,371 days.

   U.S. Patent No. 4,636,505; Granted January 13, 1987, to Howard Tucker;
Owner of Record: Zeneca Limited; Title: Amide Derivatives;
Classification: 514/256; Product Trade Name: CASODEX; Original
Expiration Date: January 13, 2004; Term Extended: 1,723 days.

   U.S. Patent No. 4,797,413; Granted January 10, 1989, to John J. Baldwin,
et. al.; Owner of Record: Merck & Co., Inc.; Title: Thieno Thiopyran
Sulfonamide Derivatives, Pharmaceutical Compositions and Use;
Classification: 514/432; Product Trade Name: TRUSOPT; Original
Expiration Date: December 12, 2004; Term Extended: 1,233 days.

   U.S. Patent No. 4,904,769; Granted February 27, 1990, to Erich
Rauenbusch; Owner of Record: Bayer Aktiengesellschaft; Title: Highly
Pure Acarbose; Classification: 536/17.2; Product Trade Name: PRECOSE;
Original Expiration Date: February 27, 2007; Term Extended: 922 days.

   U.S. Patent No. 5,155,268; Granted October 13, 1992, to Jackson B.
Hester, Jr.; Owner of Record: The Upjohn Company; Title: Antiarrhythmic
N-aminoalkylene Alkyl and Aryl Sulfonamides; Classification: 564/99;
Product Trade Name: CORVERT; Original Expiration Date: October 13,
2009; Term Extended: 76 days.