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 US06/317,278external-prioritypatent/US4425263A/en
Application filed by Du PontfiledCriticalDu Pont
Publication of DK248682ApublicationCriticalpatent/DK248682A/en