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
CA612276A
Inventor
Wilke Werner
Fetzer 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.)
Rex Asbestwerke Graf Von Rex KG
Original Assignee
Rex Asbestwerke Graf Von Rex KG
Publication date
Application grantedgrantedCritical
Publication of CA612276ApublicationCriticalpatent/CA612276A/en