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
CA767716A
Inventor
Nishikawa Yasuo
Nagasaki Susumu
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.)
Kyushu Refractories Co Ltd
Original Assignee
Kyushu Refractories Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA767716ApublicationCriticalpatent/CA767716A/en