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
Application filed by Prod Chim Et Metallurg Du RupefiledCriticalProd Chim Et Metallurg Du Rupe
Priority to AT818069ApriorityCriticalpatent/AT291931B/de
Application grantedgrantedCritical
Publication of AT291931BpublicationCriticalpatent/AT291931B/de