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
CA773665A
Inventor
H. Schwaar Robert
Gordon Foster E.
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 USA Inc
Original Assignee
E Gordon Foster
Robert H Schwaar
Shell Oil Co
Publication date
Application grantedgrantedCritical
Publication of CA773665ApublicationCriticalpatent/CA773665A/en