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
CA677677A
Inventor
Wittner Hubert
Schmitt Johannes
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.)
Aluminium Industrie AG
Original Assignee
Aluminium Industrie AG
Publication date
Application grantedgrantedCritical
Publication of CA677677ApublicationCriticalpatent/CA677677A/en