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Priority claimed from US641420Aexternal-prioritypatent/US2890322A/en
Priority claimed from US666160Aexternal-prioritypatent/US2862099A/en
Application filed by Union Carbide CorpfiledCriticalUnion Carbide Corp
Application grantedgrantedCritical
Publication of DK109457CpublicationCriticalpatent/DK109457C/en