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Priority claimed from GB6240/74Aexternal-prioritypatent/GB1487393A/en
Priority claimed from AT0103377Aexternal-prioritypatent/AT368752B/de
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of ATA153177ApublicationCriticalpatent/ATA153177A/de
Application grantedgrantedCritical
Publication of AT355297BpublicationCriticalpatent/AT355297B/de