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
CA888283A
Inventor
Hayashi Koichiro
Okamura Seizo
Iwai Tadashi
Ito Akihiko
Yoshida Masaru
Nakase Yoshiaki
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.)
Daicel Corp
Original Assignee
Daicel Corp
Publication date
Application grantedgrantedCritical
Publication of CA888283ApublicationCriticalpatent/CA888283A/en