The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2005
Filed:
Apr. 22, 2003
Masato Kaneeda, Hitachi, JP;
Kojiro Okude, Hitachi, JP;
Hidehiro Iizuka, Hitachinaka, JP;
Toshio Ogawa, Takahagi, JP;
Kousei Nagayama, Tokaimura, JP;
Hisao Yamashita, Hitachi, JP;
Yuichi Kitahara, Hitachinaka, JP;
Osamu Kuroda, Hitachi, JP;
Morio Fujitani, Akashi, JP;
Toshifumi Hiratsuka, Hitachinaka, JP;
Masato Kaneeda, Hitachi, JP;
Kojiro Okude, Hitachi, JP;
Hidehiro Iizuka, Hitachinaka, JP;
Toshio Ogawa, Takahagi, JP;
Kousei Nagayama, Tokaimura, JP;
Hisao Yamashita, Hitachi, JP;
Yuichi Kitahara, Hitachinaka, JP;
Osamu Kuroda, Hitachi, JP;
Morio Fujitani, Akashi, JP;
Toshifumi Hiratsuka, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Nitrogen oxides contained in an exhaust gas emitted from a lean-burn engine-mounted internal combustion engines are eliminated with a high efficiency. In an exhaust gas purification apparatus and process for eliminating nitrogen oxides contained in a combustion exhaust gas emitted from an internal combustion engine with a reducing gas such as carbon monoxide, hydrocarbons, etc. contained in the exhaust gas in the presence of a catalyst, a catalyst comprising all of Rh, Pt and Pd, at least one member selected from alkali metals and alkaline earth metals, and Mn or its compound, supported on a porous carrier is used.