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
CA860391A
Inventor
E. Boutillier Pierre
N. Rozenbaum Marcel
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.)
Ugine Kuhlmann SA
Original Assignee
Ugine Kuhlmann SA
Publication date
Application grantedgrantedCritical
Publication of CA860391ApublicationCriticalpatent/CA860391A/en