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
CA753643A
Inventor
Haack Erich
D. Achelis Johann
Heerdt Ruth
Muth Karl
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.)
CF Boehringer und Soehne GmbH
Original Assignee
Johann D Achelis
CF Boehringer und Soehne GmbH
Publication date
Application grantedgrantedCritical
Publication of CA753643ApublicationCriticalpatent/CA753643A/en