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:
Jul. 22, 2003
Filed:
Jul. 07, 1999
Hidehiro Iizuka, Hitachinaka, JP;
Ryouta Doi, Naka-machi, JP;
Hiroshi Hanaoka, Kodaira, JP;
Toshio Ogawa, Takahagi, JP;
Osamu Kuroda, Hitachi, JP;
Hisao Yamashita, Hitachi, JP;
Shigeru Azuhata, Hitachi, JP;
Yuichi Kitahara, Hitachinaka, JP;
Norihiro Shinotsuka, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A catalyst being formed of a porous supporter supporting alkali metals, Ti and noble metal, or further supporting at least one of rare earth metal and magnesium, being disposed in a flow passage of the internal combustion engine, and being used to purify NOx contained in the exaust gas. The above catalyst has excellent NO resistance not only to the exaust gas burnt with the stoichiometric air-to-fuel ratio or rich condition, but to the exhaust gas burnt with the lean condition, and furthermore has a high resistivity to poisoning of SOx slightly contained in the fuel.