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
CA640420A
Inventor
Poulain Roberte
Auguste Irene
Averbuch Abram
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 SA
Original Assignee
Pechiney SA
Publication date
Application grantedgrantedCritical
Publication of CA640420ApublicationCriticalpatent/CA640420A/en