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Priority claimed from GB858515385Aexternal-prioritypatent/GB8515385D0/en
Priority claimed from GB868609453Aexternal-prioritypatent/GB8609453D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP86303866Aexternal-prioritypatent/EP0206523B1/de
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Publication of ATE70051T1publicationCriticalpatent/ATE70051T1/de