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.)
Mitsui Petrochemical Industries Ltd
JFE Pipe Fitting Mfg Co Ltd
Original Assignee
Mitsui Petrochemical Industries Ltd
Nippon Kokan Pipe Fitting Mfg 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 Mitsui Petrochemical Industries Ltd, Nippon Kokan Pipe Fitting Mfg Co LtdfiledCriticalMitsui Petrochemical Industries Ltd
Priority to JP59261189ApriorityCriticalpatent/JPS61140698A/ja
Publication of JPS61140698ApublicationCriticalpatent/JPS61140698A/ja
Publication of JPH0561513B2publicationCriticalpatent/JPH0561513B2/ja