Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Research Ltd
Original Assignee
Shell Research Ltd
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 GB13034/60Aexternal-prioritypatent/GB873069A/en
Application filed by Shell Research LtdfiledCriticalShell Research Ltd
Priority to FR858273ApriorityCriticalpatent/FR1320727A/fr
Application grantedgrantedCritical
Publication of FR1320727ApublicationCriticalpatent/FR1320727A/fr