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
CA869554A
Inventor
Tamura Kihachi
Nakajima Isao
Inoue Kaname
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.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA869554ApublicationCriticalpatent/CA869554A/en