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 JP63282579Aexternal-prioritypatent/JPH01253437A/ja
Application filed by Kureha Chemical Ind Co LtdfiledCriticalKureha Chemical Ind Co Ltd
Application grantedgrantedCritical
Publication of ATE97943T1publicationCriticalpatent/ATE97943T1/de