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 NZ193043Aexternal-prioritypatent/NZ193043A/en
Priority claimed from US06/139,836external-prioritypatent/US4254141A/en
Application filed by Du PontfiledCriticalDu Pont
Priority to NZ194755ApriorityCriticalpatent/NZ194755A/en
Publication of NZ194755ApublicationCriticalpatent/NZ194755A/en