Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Showa Denko Materials Co Ltd
Original Assignee
Hitachi Chemical Co Ltd
Nippon Telegraph and Telephone Corp
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
Application filed by Hitachi Chemical Co Ltd, Nippon Telegraph and Telephone CorpfiledCriticalHitachi Chemical Co Ltd
Priority to JP50030047ApriorityCriticalpatent/JPS5838318B2/ja
Publication of JPS51105711ApublicationCriticalpatent/JPS51105711A/ja
Publication of JPS5838318B2publicationCriticalpatent/JPS5838318B2/ja
