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
CA816671A
Inventor
Fukuda Nobuo
Matsukura Kameo
Ando Narumi
Shimizu Mineo
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.)
Yawata Iron and Steel Co Ltd
Original Assignee
Yawata Iron and Steel Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA816671ApublicationCriticalpatent/CA816671A/en