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
CA837429A
Inventor
W. Burney Harold
J. Koenecke William
E. Bickel Paul
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.)
Metal Improvement Co LLC
Original Assignee
Metal Improvement Co LLC
Publication date
Application grantedgrantedCritical
Publication of CA837429ApublicationCriticalpatent/CA837429A/en