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Publication date
Priority claimed from NO3684/72Aexternal-prioritypatent/NO136298C/no
Publication of NO763697LpublicationCriticalpatent/NO763697L/no
Application filed by Ici LtdfiledCriticalIci Ltd
Priority to NO763697ApriorityCriticalpatent/NO137443C/no
Publication of NO137443BpublicationCriticalpatent/NO137443B/no
Publication of NO137443CpublicationCriticalpatent/NO137443C/no