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Priority claimed from GB878729344Aexternal-prioritypatent/GB8729344D0/en
Priority claimed from GB888812135Aexternal-prioritypatent/GB8812135D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP88311283Aexternal-prioritypatent/EP0321118B1/en
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Publication of ATE105424T1publicationCriticalpatent/ATE105424T1/en