Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP63019317Aexternal-prioritypatent/JP2501610B2/ja
Priority claimed from JP63019316Aexternal-prioritypatent/JP2647408B2/ja
Application filed by Mitsui Petrochemical IndfiledCriticalMitsui Petrochemical Ind
Priority claimed from EP89300811Aexternal-prioritypatent/EP0326408B1/de
Application grantedgrantedCritical
Publication of ATE102869T1publicationCriticalpatent/ATE102869T1/de