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 IN1649/72Aexternal-prioritypatent/IN139404B/en
Application filed by Du PontfiledCriticalDu Pont
Priority to IN618/CAL/76ApriorityCriticalpatent/IN141925B/en
Publication of IN141925BpublicationCriticalpatent/IN141925B/en