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
CA642397A
Inventor
W. Greenwald Bertrand
Milsom Daniel
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.)
Cities Service Research and Development Co
Original Assignee
Cities Service Research and Development Co
Publication date
Application grantedgrantedCritical
Publication of CA642397ApublicationCriticalpatent/CA642397A/en