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
CA743569A
Inventor
C. Eltenton George
D. H. Osgathorp Francis
Hedley Derrick
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
Derrick Hedley
George C Eltenton
Shell Oil Co
Publication date
Application grantedgrantedCritical
Publication of CA743569ApublicationCriticalpatent/CA743569A/en