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Priority claimed from GB317473*[Aexternal-prioritypatent/GB1386518A/en
Application filed by Ici LtdfiledCriticalIci Ltd
Priority to AT169175ApriorityCriticalpatent/AT345717B/de
Publication of ATA169175ApublicationCriticalpatent/ATA169175A/de
Application grantedgrantedCritical
Publication of AT345717BpublicationCriticalpatent/AT345717B/de