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
CA754794A
Inventor
R. Oldfield James
E. Saint-Amour Henri
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.)
BUILDING PRODUCTS OF CANADA Ltd
Original Assignee
BUILDING PRODUCTS OF CANADA Ltd
Publication date
Application grantedgrantedCritical
Publication of CA754794ApublicationCriticalpatent/CA754794A/en