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
Inventor
R. Yokel William
R. Williams Donald
Frank E. Cheshire, Sr.
B. Burr Linton
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.)
International Steel Co
Original Assignee
Donald R Williams
Linton B Burr
William R Yokel
International Steel Co
Publication date
Application grantedgrantedCritical
Publication of CA810924ApublicationCriticalpatent/CA810924A/en