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
CA884938A
Inventor
Suzuki Isamu
Ichikawa Kiyoshi
Murayama Keisuke
Morimura Syoji
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.)
Asahi Kasei Corp
Sankyo Co Ltd
Original Assignee
Sankyo Co Ltd
Asahi Kasei Kogyo KK
Publication date
Application grantedgrantedCritical
Publication of CA884938ApublicationCriticalpatent/CA884938A/en