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 JP11883588Aexternal-prioritypatent/JPH0819421B2/ja
Priority claimed from JP14632588Aexternal-prioritypatent/JPH0819422B2/ja
Application filed by Mitsui Petrochemical IndfiledCriticalMitsui Petrochemical Ind
Priority claimed from EP89304888Aexternal-prioritypatent/EP0342898B1/de
Application grantedgrantedCritical
Publication of ATE78860T1publicationCriticalpatent/ATE78860T1/de