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Priority claimed from US06/900,490external-prioritypatent/US4780099A/en
Application filed by Du PontfiledCriticalDu Pont
Priority claimed from EP19870301252external-prioritypatent/EP0235989B1/de
Application grantedgrantedCritical
Publication of ATE75790T1publicationCriticalpatent/ATE75790T1/de