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

   A certificate extending the term of the following patent was issued on
March 17, 1997:

   U.S. Patent No. 4,364,921; Granted December 21, 1982, to Ulrich Speck,
et. al.; Original Expiration Date: March 6, 2000; Owner of Record:
Schering Aktiengesellschaft; Title: Novel Triodinated Isophthalic Acid
Diamides as Nonionic X-Ray Contrast Media; Classification: 424/9.454;
Product Trade Name: ULTRAVIST R; Term Extended: five years.