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
CA814408A
Inventor
Yuzawa Syuichi
Kuribayashi Sadatomo
Tayama Eisei
Mishima Makio
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.)
KAY SEVEN CO
Coal Research Institute
Original Assignee
Eisei Tayama
KAY SEVEN CO
Makio Mishima
Syuichi Yuzawa
Coal Research Institute
Publication date
Application grantedgrantedCritical
Publication of CA814408ApublicationCriticalpatent/CA814408A/en