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
CA880881A
Inventor
Noguchi Toshio
Furuhashi Masao
Igarashi Bing
Yamada Kosaku
Aotsuka Noriyoshi
Ormori Mamoru
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Publication date
Application grantedgrantedCritical
Publication of CA880881ApublicationCriticalpatent/CA880881A/en