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Priority claimed from US06/514,267external-prioritypatent/US4490824A/en
Application filed by Great Lakes Carbon CorpfiledCriticalGreat Lakes Carbon Corp
Publication of NO850925LpublicationCriticalpatent/NO850925L/en
Publication of NO162490BpublicationCriticalpatent/NO162490B/en
Publication of NO162490CpublicationCriticalpatent/NO162490C/en