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Priority claimed from FR7131975Aexternal-prioritypatent/FR2151581A5/fr
Priority claimed from FR7223201Aexternal-prioritypatent/FR2191448A6/fr
Application filed by Raffinage Cie FrancaisefiledCriticalRaffinage Cie Francaise
Publication of ATA758572ApublicationCriticalpatent/ATA758572A/en
Application grantedgrantedCritical
Publication of AT339258BpublicationCriticalpatent/AT339258B/en