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Priority claimed from JP22895284Aexternal-prioritypatent/JPS61108646A/en
Priority claimed from JP22895384Aexternal-prioritypatent/JPS61108551A/en
Application filed by Mitsui Petrochemical Ind, Shell Oil CofiledCriticalMitsui Petrochemical Ind
Priority claimed from EP85307908Aexternal-prioritypatent/EP0181159B1/en
Application grantedgrantedCritical
Publication of ATE35822T1publicationCriticalpatent/ATE35822T1/en