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
CA864016A
Inventor
Pfleger Hans
Ferch Horst
Beschke Helmut
Eisenmenger Edith
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
Edith Eisenmenger
Horst Ferch
Deutsche Gold und Silber Scheideanstalt
Publication date
Application grantedgrantedCritical
Publication of CA864016ApublicationCriticalpatent/CA864016A/en