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
CA634446A
Inventor
S. Webber Charles
B. Lewis Elisha
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.)
Saint Gobain Abrasives Inc
Original Assignee
Norton Co
Publication date
Application grantedgrantedCritical
Publication of CA634446ApublicationCriticalpatent/CA634446A/en