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Priority claimed from JP1459589Aexternal-prioritypatent/JP2723137B2/en
Priority claimed from JP5087189Aexternal-prioritypatent/JP2723138B2/en
Application filed by Mitsui Petrochemical IndfiledCriticalMitsui Petrochemical Ind
Priority claimed from EP89305963Aexternal-prioritypatent/EP0350170B2/en
Application grantedgrantedCritical
Publication of ATE102223T1publicationCriticalpatent/ATE102223T1/en