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
CA768924A
Inventor
Asano Tadashi
Ito Tsutomu
Masuda Senichi
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.)
Taiheiyo Cement Corp
Original Assignee
Onoda Cement Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA768924ApublicationCriticalpatent/CA768924A/en