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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
Priority to AT388279ApriorityCriticalpatent/AT363913B/de
Publication of ATA388279ApublicationCriticalpatent/ATA388279A/de
Application grantedgrantedCritical
Publication of AT363913BpublicationCriticalpatent/AT363913B/de