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.)
JFE Steel Corp
Cosmo Oil Co Ltd
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Maruzen Oil Co Ltd
Kawasaki Steel 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 Kobe Steel Ltd, Maruzen Oil Co Ltd, Kawasaki Steel CorpfiledCriticalKobe Steel Ltd
Priority to JP6480785ApriorityCriticalpatent/JPS61223090A/ja
Publication of JPS61223090ApublicationCriticalpatent/JPS61223090A/ja
Publication of JPH0228633B2publicationCriticalpatent/JPH0228633B2/ja