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.)
Nihon Kogyo KK
Hitachi Ltd
Eneos Corp
Original Assignee
Nihon Kogyo KK
Hitachi Ltd
Nippon Mining Co Ltd
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 Nihon Kogyo KK, Hitachi Ltd, Nippon Mining Co LtdfiledCriticalNihon Kogyo KK
Priority to JP50148866ApriorityCriticalpatent/JPS5272388A/ja
Publication of JPS5272388ApublicationCriticalpatent/JPS5272388A/ja
Publication of JPS5696B2publicationCriticalpatent/JPS5696B2/ja