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
CA909468A
Inventor
Hirt Wilhelm
Weinhold Gottfried
Ringelmann Heinz
Weckesser Ernst
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Vereinigte Aluminium Werke AG
Publication date
Application grantedgrantedCritical
Publication of CA909468ApublicationCriticalpatent/CA909468A/en