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 FR8014290Aexternal-prioritypatent/FR2485519A1/en
Priority claimed from FR8101018Aexternal-prioritypatent/FR2498181A1/en
Application filed by Institut Francais Du PetrolefiledCriticalInstitut Francais Du Petrole
Priority claimed from EP81400985Aexternal-prioritypatent/EP0043309B1/en
Application grantedgrantedCritical
Publication of ATE7018T1publicationCriticalpatent/ATE7018T1/en