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Priority claimed from US06/600,669external-prioritypatent/US4489215A/en
Priority claimed from US06/600,917external-prioritypatent/US4499324A/en
Priority claimed from US06/600,665external-prioritypatent/US4499323A/en
Priority claimed from US06/666,694external-prioritypatent/US4721828A/en
Application filed by Atlantic Richfield CofiledCriticalAtlantic Richfield Co
Publication of MX162673ApublicationCriticalpatent/MX162673A/en