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.