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Priority claimed from US05/686,352external-prioritypatent/US4101448A/en
Priority claimed from US05/691,691external-prioritypatent/US4250054A/en
Priority claimed from US05/693,256external-prioritypatent/US4042533A/en
Priority claimed from AT320877Aexternal-prioritypatent/AT358533B/de
Application filed by Standard Oil Co OhiofiledCriticalStandard Oil Co Ohio
Publication of ATA388179ApublicationCriticalpatent/ATA388179A/de
Application grantedgrantedCritical
Publication of AT363912BpublicationCriticalpatent/AT363912B/de