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
CA689445A
Inventor
Rothe Wilfried
Osterloh Kurt
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.)
Dr C Otto and Co GmbH
Evonik Operations GmbH
Original Assignee
Kurt Osterloh
Wilfried Rothe
Dr C Otto and Co GmbH
Deutsche Gold und Silber Scheideanstalt
Publication date
Application grantedgrantedCritical
Publication of CA689445ApublicationCriticalpatent/CA689445A/en