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 US06/400,188external-prioritypatent/US4560792A/en
Application filed by Phillips Petroleum CofiledCriticalPhillips Petroleum Co
Priority claimed from EP83107066Aexternal-prioritypatent/EP0099572B1/de
Application grantedgrantedCritical
Publication of ATE46143T1publicationCriticalpatent/ATE46143T1/de