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:
May. 27, 2025
Filed:
Jan. 25, 2022
Applicant:
Johnson Matthey (Shanghai) Chemical Limited, Shanghai, CN;
Inventors:
Wenjie Dong, Shanghai, CN;
Hongyu Ji, Shanghai, CN;
Dongsheng Qiao, Shanghai, CN;
Zhou Shang, Shanghai, CN;
Guangyong Xiong, Shanghai, CN;
Assignee:
Johnson Matthey (Shanghai) Chemicals Limited, Shanghai, CN;
Primary Examiner:
Int. Cl.
CPC ...
F01N 3/28 (2006.01); B01D 53/94 (2006.01); F01N 3/035 (2006.01);
U.S. Cl.
CPC ...
F01N 3/2803 (2013.01); B01D 53/94 (2013.01); F01N 3/035 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/908 (2013.01); B01D 2255/915 (2013.01); B01D 2258/01 (2013.01); F01N 2330/04 (2013.01);
Abstract
A method for the manufacture of a Gasoline Particulate Filter is disclosed. The method comprises forming a washcoat slurry, coating a wall-flow filter substrate with the washcoat slurry to form a washcoated substrate, and calcining the washcoated substrate to form a Gasoline Particulate Filter. The washcoat slurry comprises a platinum group metal component consisting of Pt and Rh, an oxygen storage capacity material, and a carboxylate ion.