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
CA860866A
Inventor
J. Mcleer Thomas
W. Merrill Timothy
O. Buker Donald
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.)
Foote Mineral Co
Original Assignee
Foote Mineral Co
Publication date
Application grantedgrantedCritical
Publication of CA860866ApublicationCriticalpatent/CA860866A/en