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
CA747676A
Inventor
Johnston Robert
K. Strehlau Wesley
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.)
SECURITY ALUMINUM CO
Original Assignee
SECURITY ALUMINUM CO
Publication date
Application grantedgrantedCritical
Publication of CA747676ApublicationCriticalpatent/CA747676A/en