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Priority claimed from JP28279487Aexternal-prioritypatent/JPH0813914B2/ja
Priority claimed from JP28279387Aexternal-prioritypatent/JPH07119333B2/ja
Application filed by Mitsui Petrochemical Ind, Shell Oil CofiledCriticalMitsui Petrochemical Ind
Priority claimed from EP88310501Aexternal-prioritypatent/EP0320119B1/de
Application grantedgrantedCritical
Publication of ATE95214T1publicationCriticalpatent/ATE95214T1/de