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Priority claimed from GB1307166Aexternal-prioritypatent/GB1185306A/en
Application filed by Ici LtdfiledCriticalIci Ltd
Priority to DK171270ApriorityCriticalpatent/DK131730C/en
Publication of DK139434BpublicationCriticalpatent/DK139434B/en
Application grantedgrantedCritical
Publication of DK139434CpublicationCriticalpatent/DK139434C/da