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
CA853111A
Inventor
Yokota Yoshiyuki
Miyagawa Takashi
Tanaka Yasuto
Torii Tatuki
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.)
Dai Nippon Toryo KK
Original Assignee
Dai Nippon Toryo KK
Publication date
Application grantedgrantedCritical
Publication of CA853111ApublicationCriticalpatent/CA853111A/en