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
Inventor
Dechet Robert
Moressee Georges
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.)
Normacem SA
Original Assignee
Normacem SA
Publication date
Application grantedgrantedCritical
Publication of CA656433ApublicationCriticalpatent/CA656433A/en