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 US06/672,488external-prioritypatent/US4602112A/en
Application filed by Du PontfiledCriticalDu Pont
Priority claimed from EP85308196Aexternal-prioritypatent/EP0183423B1/de
Application grantedgrantedCritical
Publication of ATE53832T1publicationCriticalpatent/ATE53832T1/de