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
CA880234A
Inventor
Ueshima Kumao
Fukada Kenzo
Yoshinaga Masakazu
Nakazono Hiroshi
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
Original Assignee
Hiroshi Nakazono
Kenzo Fukada
Kumao Ueshima
Masakazu Yoshinaga
Nippon Steel Corp
Publication date
Application grantedgrantedCritical
Publication of CA880234ApublicationCriticalpatent/CA880234A/en