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 JP3307911Aexternal-prioritypatent/JP3041655B2/ja
Priority claimed from JP03350330Aexternal-prioritypatent/JP3073580B2/ja
Application filed by Mitsubishi Rayon CofiledCriticalMitsubishi Rayon Co
Application grantedgrantedCritical
Publication of TW231297BpublicationCriticalpatent/TW231297B/zh