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 US07/089,717external-prioritypatent/US4809778A/en
Application filed by Marathon Oil CofiledCriticalMarathon Oil Co
Publication of NO891714D0publicationCriticalpatent/NO891714D0/no
Publication of NO891714LpublicationCriticalpatent/NO891714L/no