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
CA862146A
Inventor
Ishi Toshiharu
Fujita Hiroaki
Sato Takeshi
Urabe Nobusuke
Asahi Akira
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 CA862146ApublicationCriticalpatent/CA862146A/en