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:
Aug. 18, 2009
Filed:
Dec. 15, 2004
Hirohisa Tanaka, Shiga, JP;
Isao Tan, Shiga, JP;
Mari Uenishi, Shiga, JP;
Masashi Taniguchi, Shiga, JP;
Hirohisa Tanaka, Shiga, JP;
Isao Tan, Shiga, JP;
Mari Uenishi, Shiga, JP;
Masashi Taniguchi, Shiga, JP;
Daihatsu Motor Co., Ltd., Osaka, JP;
Abstract
A catalyst composition which prevents deterioration due to grain growth of Rh and/or Pt, includes a perovskite-type composite oxide represented by the following general formula (1):AA'BB′NO  (1)wherein A represents at least one element selected from alkaline earth metals; A′ represents at least one element selected from rare earth elements; B represents at least one element selected from Ti, Zr, and Hf; B′ represents at least one element selected from transition elements (excluding rare earth elements, Ti, Zr, Hf, Rh, and Pt) and Al; N represents at least one element selected from Rh and Pt; x represents an atomic ratio satisfying the following condition: 0≦x≦0.4; y represents an atomic ratio satisfying the following condition: 0≦y<0.5; z represents an atomic ratio satisfying the following condition: 0<z≦0.5; and X represents 0 when N represents Pt alone.