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
Application filed by Du PontfiledCriticalDu Pont
Priority claimed from EP89901779Aexternal-prioritypatent/EP0452305B1/de
Application grantedgrantedCritical
Publication of ATE114699T1publicationCriticalpatent/ATE114699T1/de