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Priority claimed from GB1024174Aexternal-prioritypatent/GB1430046A/en
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of ATA178475ApublicationCriticalpatent/ATA178475A/de
Application grantedgrantedCritical
Publication of AT339089BpublicationCriticalpatent/AT339089B/de