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
CA621159A
Inventor
T. Grubb Norval
J. Davis Jefferson
J. Mcneil Donald
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.)
Electric Steel Foundry Co
Original Assignee
Electric Steel Foundry Co
Publication date
Application grantedgrantedCritical
Publication of CA621159ApublicationCriticalpatent/CA621159A/en