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
CA817845A
Inventor
J. Gardner Weldon
John B. Cahoon, Jr.
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.)
Vesuvius Crucible Co
Original Assignee
Vesuvius Crucible Co
Publication date
Application grantedgrantedCritical
Publication of CA817845ApublicationCriticalpatent/CA817845A/en