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Priority claimed from GB878708266Aexternal-prioritypatent/GB8708266D0/en
Application filed by Boc Group PlcfiledCriticalBoc Group Plc
Priority claimed from EP88302876Aexternal-prioritypatent/EP0286314B1/en
Application grantedgrantedCritical
Publication of ATE76498T1publicationCriticalpatent/ATE76498T1/en