Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB1307166Aexternal-prioritypatent/GB1185306A/en
Priority claimed from DK148767Aexternal-prioritypatent/DK139434B/en
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of DK131730BpublicationCriticalpatent/DK131730B/en
Application grantedgrantedCritical
Publication of DK131730CpublicationCriticalpatent/DK131730C/en