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
CA671690A
Inventor
A. Clark Alan
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.)
Metallurgical Processes Ltd
National Smelting Co Ltd
Metallurgical Dev Co
Original Assignee
Metallurgical Processes Ltd
National Smelting Co Ltd
Metallurgical Dev Co
Publication date
Application grantedgrantedCritical
Publication of CA671690ApublicationCriticalpatent/CA671690A/en