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
CA819175A
Inventor
Shimamura Takeshi
Yasumura Tomohide
Onodera Kosaku
Sameshima Yasuro
Oono Teruo
Taniguchi Isoji
Maemoto Kenichi
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.)
Sumitomo Chemical Co Ltd
Toyobo Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
Toyobo Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA819175ApublicationCriticalpatent/CA819175A/en