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
CA642894A
Inventor
Katzschmann Ewald
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.)
Chemische Werke Witten GmbH
Original Assignee
Chemische Werke Witten GmbH
Publication date
Application grantedgrantedCritical
Publication of CA642894ApublicationCriticalpatent/CA642894A/en