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 IN2664/CAL/73Aexternal-prioritypatent/IN139418B/en
Priority claimed from GB5751773Aexternal-prioritypatent/GB1457876A/en
Application filed by Ici LtdfiledCriticalIci Ltd
Priority to IN2679/CAL/74ApriorityCriticalpatent/IN141235B/en
Publication of IN141235BpublicationCriticalpatent/IN141235B/en