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Priority claimed from US06/687,308external-prioritypatent/US4564558A/en
Priority claimed from US06/687,417external-prioritypatent/US4564559A/en
Priority claimed from US06/687,391external-prioritypatent/US4565739A/en
Application filed by Mobil Oil CorpfiledCriticalMobil Oil Corp
Priority claimed from EP85307710Aexternal-prioritypatent/EP0186279B1/de
Application grantedgrantedCritical
Publication of ATE51581T1publicationCriticalpatent/ATE51581T1/de