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
CA898186A
Inventor
Berthon Robert
Bichara Michel
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.)
Emc (entreprise Miniere Et Chimique)
Original Assignee
Emc (entreprise Miniere Et Chimique)
Publication date
Application grantedgrantedCritical
Publication of CA898186ApublicationCriticalpatent/CA898186A/en