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
CA906699A
Inventor
Nakata Tetsuya
Kawamata Kiyoshige
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.)
Osaka Soda Co Ltd
Original Assignee
Osaka Soda Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA906699ApublicationCriticalpatent/CA906699A/en