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Priority claimed from GB868612776Aexternal-prioritypatent/GB8612776D0/en
Priority claimed from GB868616187Aexternal-prioritypatent/GB8616187D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP87304420Aexternal-prioritypatent/EP0247776B1/de
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Publication of ATE83498T1publicationCriticalpatent/ATE83498T1/de