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
CA894369A
Inventor
Nakazawa Saburo
Mori Hideaki
Noguchi Takeshi
Shimizu Toshiaki
Nakazawa Genichi
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.)
Sumitomo Metal Mining Co Ltd
Original Assignee
Sumitomo Metal Mining Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA894369ApublicationCriticalpatent/CA894369A/en