Granted Patent
Utility
US 4,113,838 · App. 05/755,936
Method of treating combustion exhaust gas containing nitrogen oxides
Inventors:
Sakae Koike, Shoichi Matsunami, Yorinobu Goto, Yoshio Tanabe
Patented Case
View Patent ↗
Granted: Sep 12, 1978
Filed: Dec 30, 1976
Inventors
Sakae Koike
Shoichi Matsunami
Yorinobu Goto
Yoshio Tanabe
Assignee (at issue)
Mitsubishi Chemical Industries, 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.