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Priority claimed from JP62056726Aexternal-prioritypatent/JP2537506B2/ja
Priority claimed from JP62056727Aexternal-prioritypatent/JP2538584B2/ja
Application filed by Mitsui Petrochemical IndfiledCriticalMitsui Petrochemical Ind
Priority claimed from EP88302168Aexternal-prioritypatent/EP0282341B1/de
Application grantedgrantedCritical
Publication of ATE76413T1publicationCriticalpatent/ATE76413T1/de