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
CA844538A
Inventor
Poignant Pierre
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.)
Pechiney Progil SA
Original Assignee
Pechiney Progil SA
Publication date
Application grantedgrantedCritical
Publication of CA844538ApublicationCriticalpatent/CA844538A/en