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.)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US00423292Aexternal-prioritypatent/US3851143A/en
Application filed by Vale Canada LtdfiledCriticalVale Canada Ltd
Application grantedgrantedCritical
Publication of CA974306ApublicationCriticalpatent/CA974306A/en