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Priority claimed from GB868602318Aexternal-prioritypatent/GB8602318D0/en
Priority claimed from GB868612283Aexternal-prioritypatent/GB8612283D0/en
Application filed by British Petroleum Co PlcfiledCriticalBritish Petroleum Co Plc
Priority claimed from EP87300809Aexternal-prioritypatent/EP0232138B1/de
Application grantedgrantedCritical
Publication of ATE84807T1publicationCriticalpatent/ATE84807T1/de