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 to BE576810DpriorityCriticalpatent/BE576810A/xx
Priority to NL237001Dprioritypatent/NL237001A/xx
Application filed by Leuna Werke VebfiledCriticalLeuna Werke Veb
Priority to AT288958Aprioritypatent/AT206888B/en
Priority to CH6965559Aprioritypatent/CH380743A/en
Priority to GB1139459Aprioritypatent/GB903404A/en
Priority to FR792151Aprioritypatent/FR1219962A/en
Application grantedgrantedCritical
Publication of AT206888BpublicationCriticalpatent/AT206888B/en