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
CA749847A
Inventor
E. Marshall Edward
E. Ullman 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.)
Huntingdon Industries Inc
Original Assignee
Huntingdon Industries Inc
Publication date
Application grantedgrantedCritical
Publication of CA749847ApublicationCriticalpatent/CA749847A/en