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.)
Expired
Application number
CA886503A
Inventor
Yamaguchi Tetsuo
Kido Hiroshi
Nagasawa Takao
Ohmori Toshio
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 Engineering Corp
Original Assignee
Nippon Kokan Ltd
Publication date
Application grantedgrantedCritical
Publication of CA886503ApublicationCriticalpatent/CA886503A/en