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
CA745105A
Inventor
Toporski Walter
Jurgens Manfred
Welzel Helmut
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.)
VEB FOTOCHEMISCHE WERKE BERLIN
Original Assignee
VEB FOTOCHEMISCHE WERKE BERLIN
Publication date
Application grantedgrantedCritical
Publication of CA745105ApublicationCriticalpatent/CA745105A/en