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
CA831735A
Inventor
M. Gy Pierre
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.)
MINERAIS ET METAUX
Original Assignee
MINERAIS ET METAUX
Publication date
Application grantedgrantedCritical
Publication of CA831735ApublicationCriticalpatent/CA831735A/en