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
CA700585A
Inventor
M. Wicken Oscar
Original Assignee
Canadian Refractories Ltd
Publication date
Application grantedgrantedCritical
Publication of CA700585ApublicationCriticalpatent/CA700585A/en