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
Application filed by Shell Oil CofiledCriticalShell Oil Co
Priority claimed from EP19820111264external-prioritypatent/EP0081787B1/en
Application grantedgrantedCritical
Publication of ATE25526T1publicationCriticalpatent/ATE25526T1/en