Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DD23114881Aexternal-prioritypatent/DD160576A3/en
Priority claimed from DD23501981Aexternal-prioritypatent/DD217960A3/en
Priority claimed from DD23822682Aexternal-prioritypatent/DD208451A3/en
Application filed by Berlin Chemie VebfiledCriticalBerlin Chemie Veb
Priority claimed from EP82105548Aexternal-prioritypatent/EP0068442B1/en
Application grantedgrantedCritical
Publication of ATE18332T1publicationCriticalpatent/ATE18332T1/en