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 US06/205,781external-prioritypatent/US4361590A/en
Application filed by Darling Delaware CofiledCriticalDarling Delaware Co
Application grantedgrantedCritical
Publication of ATE15690T1publicationCriticalpatent/ATE15690T1/de