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.)
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Publication date
Priority claimed from IN472/CAL/87Aexternal-prioritypatent/IN167722B/en
Priority claimed from CA000540025Aexternal-prioritypatent/CA1283696C/en
Application filed by E I Di Pont De Nemours And CofiledCriticalE I Di Pont De Nemours And Co
Priority to IN503/CAL/90ApriorityCriticalpatent/IN169808B/en
Publication of IN169808BpublicationCriticalpatent/IN169808B/en