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Priority claimed from US06/557,098external-prioritypatent/US4778839A/en
Priority claimed from US06/557,099external-prioritypatent/US4766164A/en
Application filed by Hoechst Celanese CorpfiledCriticalHoechst Celanese Corp
Priority claimed from EP84307812Aexternal-prioritypatent/EP0144175B1/en
Application grantedgrantedCritical
Publication of ATE37556T1publicationCriticalpatent/ATE37556T1/en