Granted Patent
Utility
US 4,363,700 · App. 06/130,007
Process for pulping lignocellulosic material with an alkaline sulfide cooking liquor containing an accelerating additive and reducing assistant
Inventors:
Isao Wada, Jun-Ichiro Kido, Kazuo Koido
Patented Case
View Patent ↗
Granted: Dec 14, 1982
Filed: Mar 13, 1980
Inventors
Isao Wada
Jun-Ichiro Kido
Kazuo Koido
Assignee (at issue)
Oji Paper Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.