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Priority claimed from FR8410675Aexternal-prioritypatent/FR2549490A1/fr
Priority claimed from FR8500637Aexternal-prioritypatent/FR2576060B2/fr
Application filed by Elf FrancefiledCriticalElf France
Priority claimed from EP19850400107external-prioritypatent/EP0152321B1/de
Application grantedgrantedCritical
Publication of ATE30456T1publicationCriticalpatent/ATE30456T1/de