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 Canada Ltd
Original Assignee
Shell Canada 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 GB08204457Aexternal-prioritypatent/GB2114888A/en
Application filed by Shell Canada LtdfiledCriticalShell Canada Ltd
Application grantedgrantedCritical
Publication of CA1192054ApublicationCriticalpatent/CA1192054A/fr