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
CA639770A
Inventor
Doehlemann Ernst
Scheinost Kurt
Kaess Franz
Strassberger Lothar
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.)
Evonik Operations GmbH
Original Assignee
SKW Trostberg AG
Publication date
Application grantedgrantedCritical
Publication of CA639770ApublicationCriticalpatent/CA639770A/en