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
CA713119A
Inventor
Schweitzer Otto
Goecke Max
Nagelschmidt Rudolf
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
Max Goecke
Rudolf Nagelschmidt
Deutsche Gold und Silber Scheideanstalt
Publication date
Application grantedgrantedCritical
Publication of CA713119ApublicationCriticalpatent/CA713119A/en