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
CA638856A
Inventor
Sommer Hans
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.)
Holcim Belgique SA
Original Assignee
Ciments dObourg SA
Publication date
Application grantedgrantedCritical
Publication of CA638856ApublicationCriticalpatent/CA638856A/en