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 US05/885,872external-prioritypatent/US4169197A/en
Application filed by Upjohn CofiledCriticalUpjohn Co
Publication of ZA784492BpublicationCriticalpatent/ZA784492B/en