Catapres patent
Executive Summary
Boehringer-Ingelheim's U.S. process and product patents (nos. 3202660 and 3236857, respectively) for the antihypertensive agent clonidine have expired; however, composition/use patent no. 3454701, issued in 1969, will be in effect until July 8, 1986. "The Pink Sheet" incorrectly included Catapres among a list of post-1962 drugs that will be accessible to ANDA competition by Jan. 1, 1985 (Oct. 29, p. 13)