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Priority claimed from FR868602394Aexternal-prioritypatent/FR2594782B2/fr
Priority claimed from FR868610403Aexternal-prioritypatent/FR2601640B2/fr
Application filed by Elf FrancefiledCriticalElf France
Priority claimed from EP87400309Aexternal-prioritypatent/EP0236196B1/de
Application grantedgrantedCritical
Publication of ATE48813T1publicationCriticalpatent/ATE48813T1/de