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Priority claimed from JP63129797Aexternal-prioritypatent/JP2567913B2/en
Priority claimed from JP63129798Aexternal-prioritypatent/JP2567914B2/en
Application filed by Mitsui Petrochemical IndfiledCriticalMitsui Petrochemical Ind
Priority claimed from EP89305332Aexternal-prioritypatent/EP0344978B1/en
Application grantedgrantedCritical
Publication of ATE83762T1publicationCriticalpatent/ATE83762T1/en