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
CA644732A
Inventor
W. F. Phillips Norman
A. Hollingshead Ethan
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.)
Alcan Research and Development Ltd
Original Assignee
Aluminium Laboratories Ltd
Publication date
Application grantedgrantedCritical
Publication of CA644732ApublicationCriticalpatent/CA644732A/en