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. 28, 2009
Filed:
Jul. 12, 2005
Applicants:
Seiji Miyoshi, Hiroshima, JP;
Hiroshi Yamada, Hiroshima, JP;
Akihide Takami, Hiroshima, JP;
Inventors:
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D 50/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A Ce—Zr mixed oxide is employed as an oxygen storage component for a lean-NOx catalyst, and catalytic precious metal atoms are placed at and/or between crystal lattice points of the mixed oxide. This structure prevents the sintering of the precious metal and accelerates movement of oxygen ions in each of crystallites of the Ce—Zr mixed oxide to increase the oxygen storage/release amount of the mixed oxide, which enhances the NOx removal performance of the catalyst.