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 Uk Ni Uglekhimicheskij I UkhinfiledCriticalUk Ni Uglekhimicheskij I Ukhin
Priority to SU904855721ApriorityCriticalpatent/RU1775343C/en
Application grantedgrantedCritical
Publication of RU1775343CpublicationCriticalpatent/RU1775343C/en