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Priority claimed from US07/210,434external-prioritypatent/US4827073A/en
Priority claimed from US07/210,435external-prioritypatent/US4827064A/en
Application filed by Mobil Oil CorpfiledCriticalMobil Oil Corp
Priority claimed from EP89905983Aexternal-prioritypatent/EP0422019B1/en
Application grantedgrantedCritical
Publication of ATE97946T1publicationCriticalpatent/ATE97946T1/en