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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.:

US 8389435 B1

PDFFull Text
Date of Patent:
Mar. 05, 2013

Filed:

Mar. 30, 2007

Metal oxide catalyst carrier particle and exhaust gas purification catalyst

Applicants:

Masahide Miura, Susono, JP;

Nobuyuki Takagi, Susono, JP;

Shinichi Matsumoto, Toyota, JP;

Toshitaka Tanabe, Aichi-ken, JP;

Yasutaka Nagai, Aichi-ken, JP;

Kazuhiko Dohmae, Nissin, JP;

Yasuo Ikeda, Toyota, JP;

Inventors:

Masahide Miura, Susono, JP;

Nobuyuki Takagi, Susono, JP;

Shinichi Matsumoto, Toyota, JP;

Toshitaka Tanabe, Aichi-ken, JP;

Yasutaka Nagai, Aichi-ken, JP;

Kazuhiko Dohmae, Nissin, JP;

Yasuo Ikeda, Toyota, JP;

Assignee:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;

Attorney:

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Primary Examiner:

Patricia L Hailey

Int. Cl.
CPC ...
B01J 23/00 (2006.01); B01J 23/10 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/08 (2006.01); B01J 8/02 (2006.01); B01J 8/00 (2006.01); B01D 53/56 (2006.01); B01D 53/86 (2006.01); B01D 53/94 (2006.01); C01B 21/00 (2006.01); C01B 23/00 (2006.01); C01B 25/00 (2006.01); C01B 31/00 (2006.01); C01B 33/00 (2006.01); C01B 35/00 (2006.01); C01G 28/00 (2006.01); C01G 30/00 (2006.01); B32B 5/16 (2006.01); B32B 9/00 (2006.01); B32B 15/02 (2006.01); B32B 17/02 (2006.01); B32B 19/00 (2006.01); B32B 21/02 (2006.01); B32B 23/02 (2006.01); B32B 27/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

A metal oxide catalyst carrier particle has a center portion and an outer skin portion each containing a first metal oxide and a second metal oxide. The center portion and the outer skin portion are different in composition. The mole fraction of the metal of the first metal oxide is higher in the center portion than in the outer skin portion and the mole fraction of the metal of the second metal oxide is higher in the outer skin portion than in the center portion. The second metal oxide is selected from the group consisting of rare earth oxides, except for ceria, and alkali earth metal oxides. In addition, platinum is supported on the metal oxide catalyst carrier particle, thus forming an exhaust gas purification catalyst.

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