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. 02, 2022
Filed:
May. 17, 2019
Applicant:
Tokyo Roki Co., Ltd., Kanagawa, JP;
Inventor:
Takayuki Mori, Kanagawa, JP;
Assignee:
TOKYO ROKI CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 29/06 (2006.01); B01J 35/02 (2006.01); F01N 3/035 (2006.01); F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 3/28 (2006.01);
U.S. Cl.
CPC ...
F01N 3/035 (2013.01); B01J 29/06 (2013.01); B01J 35/023 (2013.01); B01J 35/026 (2013.01); F01N 3/0842 (2013.01); F01N 3/208 (2013.01); F01N 3/28 (2013.01); F01N 2370/04 (2013.01);
Abstract
To provide an exhaust gas purification catalyst that is less likely to cause an increase in pressure loss, even a large amount of zeolite-based SCR catalyst is used to improve NOx purification capability. The exhaust gas purification catalyst includes a DPF provided with zeolite having a primary particle size equal to or less than 0.5 μm. In addition, it is preferable that 50% particle size of the zeolite measured by dynamic light scattering is equal to or less than 2.0 μm, and further, it is preferable that the 90% particle size of the zeolite is equal to or less than 2.5 μm.