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Priority claimed from US06/428,806external-prioritypatent/US4465505A/en
Priority claimed from US06/436,631external-prioritypatent/US4511392A/en
Application filed by Du PontfiledCriticalDu Pont
Priority claimed from EP83300073Aexternal-prioritypatent/EP0083975B1/de
Application grantedgrantedCritical
Publication of ATE30915T1publicationCriticalpatent/ATE30915T1/de