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
CA885930A
Inventor
H. Mccunn Thomas
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.)
Allegheny Ludlum Corp
Original Assignee
Allegheny Ludlum Corp
Publication date
Application grantedgrantedCritical
Publication of CA885930ApublicationCriticalpatent/CA885930A/en