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
CA734048A
Inventor
Takashi Yukichi
Aishima Itsuho
Kobayashi Yuji
Tsunoda Yoshio
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
Original Assignee
Asahi Kasei Kogyo KK
Publication date
Application grantedgrantedCritical
Publication of CA734048ApublicationCriticalpatent/CA734048A/en