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
CA763846A
Inventor
Friker Hans-Helmut
Altrogge Karl
Heuse Otto
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.)
Cavity GmbH
Original Assignee
Deutsche Solvay Werke GmbH
Publication date
Application grantedgrantedCritical
Publication of CA763846ApublicationCriticalpatent/CA763846A/en