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Priority claimed from GB838313527Aexternal-prioritypatent/GB8313527D0/en
Priority claimed from GB838314519Aexternal-prioritypatent/GB8314519D0/en
Application filed by Elf Uk PlcfiledCriticalElf Uk Plc
Priority claimed from EP84303207Aexternal-prioritypatent/EP0126600B1/en
Application grantedgrantedCritical
Publication of ATE41057T1publicationCriticalpatent/ATE41057T1/en