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
CA618635A
Inventor
N. Porterfield Jack
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.)
ALUMINUM INTERNATIONAL
Original Assignee
ALUMINUM INTERNATIONAL
Publication date
Application grantedgrantedCritical
Publication of CA618635ApublicationCriticalpatent/CA618635A/en