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 GB246/69Aexternal-prioritypatent/GB1268191A/en
Application filed by Ici LtdfiledCriticalIci Ltd
Priority claimed from IE305/69Aexternal-prioritypatent/IE32658B1/en
Publication of IE32662LpublicationCriticalpatent/IE32662L/en
Publication of IE32662B1publicationCriticalpatent/IE32662B1/en