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
CA772131A
Inventor
A. Dunton Thornley
Original Assignee
Vale Canada Ltd
Publication date
Application grantedgrantedCritical
Publication of CA772131ApublicationCriticalpatent/CA772131A/en