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
CA760870A
Inventor
Rink Karl-Heinz
Bader Erich
K. Schworzer Ludwig
H. Michel 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.)
Evonik Operations GmbH
Original Assignee
Erich Bader
Hans H Michel
Karl-Heinz Rink
Ludwig K Schworzer
Deutsche Gold und Silber Scheideanstalt
Publication date
Application grantedgrantedCritical
Publication of CA760870ApublicationCriticalpatent/CA760870A/en