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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 10710023 B1

PDFFull Text
Date of Patent:
Jul. 14, 2020

Filed:

Feb. 23, 2017

Exhaust gas purification catalyst

Applicant:

Cataler Corporation, Kakegawa-shi, Shizuoka, JP;

Inventors:

Koki Yanagawa, Kakegawa, JP;

Satoshi Matsueda, Kakegawa, JP;

Yu Sakurada, Kakegawa, JP;

Chihiro Kasuya, Kakegawa, JP;

Assignee:

CATALER CORPORATION, Shizuoka, JP;

Attorney:

Oliff PLC

Primary Examiner:

Matthew T Larg

Int. Cl.
CPC ...
F01N 3/20 (2006.01); B01D 53/94 (2006.01); B01J 37/08 (2006.01); B01J 27/053 (2006.01); B01J 35/00 (2006.01); B01J 37/02 (2006.01); F01N 3/10 (2006.01); B01J 35/04 (2006.01); B01J 37/04 (2006.01);
U.S. Cl.
CPC ...
B01D 53/9409 (2013.01); B01D 53/945 (2013.01); B01J 27/053 (2013.01); B01J 35/002 (2013.01); B01J 35/0006 (2013.01); B01J 35/0073 (2013.01); B01J 37/0215 (2013.01); B01J 37/0234 (2013.01); B01J 37/0244 (2013.01); B01J 37/08 (2013.01); F01N 3/10 (2013.01); F01N 3/101 (2013.01); F01N 3/206 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/204 (2013.01); B01D 2255/407 (2013.01); B01D 2255/9022 (2013.01); B01D 2258/014 (2013.01); B01J 35/04 (2013.01); B01J 37/0221 (2013.01); B01J 37/04 (2013.01); B01J 37/088 (2013.01); B01J 2523/00 (2013.01); F01N 2510/06 (2013.01);
Abstract

An exhaust gas purification catalyst, characterized by having a catalyst layer containing palladium, rhodium, and alumina, which supports a sulfate of an alkaline-earth metal selected from barium sulfate and strontium sulfate, and the correlation coefficients ρand ρcalculated from the characteristic X-ray intensity measured using an electron beam micro-analyzer for the palladium, rhodium, and alkaline-earth metal being +0.75 to +1.00 and 0.00 to +0.25, respectively, using 350 points as measurement points obtained by equally dividing the catalyst layer into 351 parts in the thickness direction on a virtual straight line that runs through the catalyst layer in the thickness direction.

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