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
CA889248A
Inventor
Sato Susumu
Ono Shujiro
Horiguchi Hiroshi
Tanaka Hideki
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
Hideki Tanaka
Hiroshi Horiguchi
Shujiro Ono
Nippon Steel Corp
Susumu Sato
Publication date
Application grantedgrantedCritical
Publication of CA889248ApublicationCriticalpatent/CA889248A/en