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 GB4336275Aexternal-prioritypatent/GB1541569A/en
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of ZA766222BpublicationCriticalpatent/ZA766222B/en