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
CA762741A
Inventor
R. Mcclelland Etheridge
T. Petersen Carl
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.)
Filper Corp
Original Assignee
Filper Corp
Publication date
Application grantedgrantedCritical
Publication of CA762741ApublicationCriticalpatent/CA762741A/en