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
CA888294A
Inventor
Oohara Kunio
Tomita Akira
Momiyama Zenziro
Nakaoji Kunio
Murakami Heiichiro
Yamamoto 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.)
Toyobo Co Ltd
Original Assignee
Toyobo Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA888294ApublicationCriticalpatent/CA888294A/en