Granted Patent
Utility
US 4,129,651 · App. 05/739,729
Method of removing nitrogen oxides in exhaust combustion gases
Inventors:
Sakae Koike, Shoichi Matsunami, Yasuo Fujiwara
Patented Case
View Patent ↗
Granted: Dec 12, 1978
Filed: Nov 8, 1976
Inventors
Sakae Koike
Shoichi Matsunami
Yasuo Fujiwara
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.