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.)
Expired
Application number
CA097500A
Inventor
Donninger Cyril
E. Hawes John
A. Schofield John
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 Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 GB54653/69Aexternal-prioritypatent/GB1269476A/en
Priority claimed from GB5465370Aexternal-prioritypatent/GB1337006A/en
Application filed by Shell Internationale Research Maatschappij BVfiledCriticalShell Internationale Research Maatschappij BV
Application grantedgrantedCritical
Publication of CA936165ApublicationCriticalpatent/CA936165A/en