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Priority claimed from DE2457972Aexternal-prioritypatent/DE2457972C3/en
Application filed by Akzo NvfiledCriticalAkzo Nv
Priority claimed from AT911177Aexternal-prioritypatent/AT352285B/en
Publication of ATA611077ApublicationCriticalpatent/ATA611077A/en
Application grantedgrantedCritical
Publication of AT356510BpublicationCriticalpatent/AT356510B/en