Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/438,200external-prioritypatent/US4457939A/en
Priority claimed from US06/438,199external-prioritypatent/US4452806A/en
Application filed by PfizerfiledCriticalPfizer
Priority claimed from EP83306459Aexternal-prioritypatent/EP0112620B1/en
Application grantedgrantedCritical
Publication of ATE24497T1publicationCriticalpatent/ATE24497T1/en