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 Steel Corp
Sumikin Kokan Koji KK
Original Assignee
Sumitomo Metal Industries Ltd
Sumikin Kokan Koji KK
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 Sumitomo Metal Industries Ltd, Sumikin Kokan Koji KKfiledCriticalSumitomo Metal Industries Ltd
Priority to JP19875982ApriorityCriticalpatent/JPS5989894A/ja
Publication of JPS5989894ApublicationCriticalpatent/JPS5989894A/ja
Publication of JPS6261835B2publicationCriticalpatent/JPS6261835B2/ja