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
CA740702A
Inventor
W. Birch Clifford
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.)
BIRCH BROTHERS
Original Assignee
BIRCH BROTHERS
Publication date
Application grantedgrantedCritical
Publication of CA740702ApublicationCriticalpatent/CA740702A/en