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

   Certificates extending the terms of the following patents were issued on
September 5, 1997.

   U.S. Patent No. 4,048,306; Granted September 13, 1977, to Roland Maier
et al.; Owner of Record: Boehringer Ingelheim GmbH; Title:
Aldehyde-Erythromycyclamine Condensation Products; Classification:
424/180; Product Trade Name: DYNABAC (dirithromycin); Original
Expiration Date: March 29, 1996; Term Extended: 1,626 days; Expiration
Date of Extension: September 10, 2000.

   U.S. Patent No. 4,235,892; Granted November 25, 1980, to T.L.
Nagabhushan et al.; Owner of Record: Schering Corporation; Title:
1-Aryl-2-Acylamino-3-Fluoro-1-Propanols, Methods for Their Use as
Antibacterial Agents and Compositions Useful Therefor; Classification:
514/522; Product Trade Name: NUFLOR (Florfenicol); Original
Expiration Date: February 5, 1999; Term Extended: Three years;
Expiration Date of Extension: February 5, 2002.

   U.S. Patent No. 4,379,785; Granted April 12, 1983, to Rudi Weyer et al.;
Owner of Record: Hoechst Atiengesellschaft; Title: Heterocyclic
Substituted Sulfonyl Ureas, and Their Use; Classification: 514/183;
Product Trade Name: AMAYRL (glimepiride); Original Expiration Date:
December 17, 2000; Term Extended: 1,571 days; Expiration Date of
Extension: April 6, 2005.

   U.S. Patent No. 4,883,812; Granted November 28, 1989, to Salvador
Moncada et al.; Owner of Record: Glaxo Wellcome Inc.; Title: Treatment
of Hypertension Using Prostacyclin; Classification: 514/469; Product
Trade Name: FLOLAN (epoprostenol sodium); Original Expiration Date:
September 3, 2002; Term Extended: 1,347 days; Expiration Date of
Extension: May 12, 2006.