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Priority claimed from US06/628,259external-prioritypatent/US4604131A/en
Priority claimed from US06/628,939external-prioritypatent/US4652304A/en
Application filed by Du PontfiledCriticalDu Pont
Priority claimed from EP84305305Aexternal-prioritypatent/EP0135332B1/de
Application grantedgrantedCritical
Publication of ATE39118T1publicationCriticalpatent/ATE39118T1/de