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:
Mar. 08, 2022
Filed:
Mar. 19, 2019
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Hiroki Kurihara, Saitama, JP;
Yu Sakurada, Saitama, JP;
Yusuke Nagai, Saitama, JP;
Yoshinori Endo, Saitama, JP;
Takeshi Nabemoto, Saitama, JP;
Shingo Akita, Saitama, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A substrate () of an exhaust gas purification catalyst () includes inflow-side cells (), outflow-side cells (), and porous partition walls (), each porous partition wall separating the cells () from each other. A first catalyst portions () is provided at least on a portion of a side of the partition wall () that faces the inflow-side cell (), the portion being located on an upstream side in an exhaust gas flow direction, and a second catalyst portion () is provided at least on a portion of a side of the partition wall that faces the outflow-side cell, the portion being located on a downstream side in the exhaust gas flow direction. A first pore volume is greater than a second pore volume, where the first pore volume is a pore volume of pores with a pore size of 10 μm to 18 μm, as measured on the first catalyst portions () and the partition walls () within a region where the first catalyst portions () are provided, and the second pore volume is a pore volume of pores with a pore size of 10 μm to 18 μm, as measured on the second catalyst portions () and the partition walls () within a region where the second catalyst portions () are provided. The first catalyst portion () exhibits the peak top of the pore size at between 20 nm and 500 nm.