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Priority claimed from GB47048/69Aexternal-prioritypatent/GB1285038A/en
Priority claimed from YU410/70Aexternal-prioritypatent/YU34275B/en
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of YU193575ApublicationCriticalpatent/YU193575A/xx
Publication of YU34280BpublicationCriticalpatent/YU34280B/en