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
CA692284A
Inventor
Shirai Kozo
Sugino Kiichiro
Kitawaki Rokuro
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 Carbide Industries Co Inc
Original Assignee
Nippon Carbide Industries Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA692284ApublicationCriticalpatent/CA692284A/en