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
CA843902A
Inventor
A. Nickola Richard
T. Spare Gordon
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
Publication date
Application grantedgrantedCritical
Publication of CA843902ApublicationCriticalpatent/CA843902A/en