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
CA690557A
Inventor
Y. Waddan Dhafir
D. Shimmin James
L. Fletcher Kenneth
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
Dhafir Y Waddan
James D Shimmin
Kenneth L Fletcher
Shell Oil Co
Publication date
Application grantedgrantedCritical
Publication of CA690557ApublicationCriticalpatent/CA690557A/en