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:
Jun. 03, 2014
Filed:
Apr. 07, 2011
Atsushi Kishimoto, Tokyo, JP;
Masamichi Tanaka, Tokyo, JP;
Keita Ishizaki, Utsunomiya, JP;
Katsunori Hanamura, Tokyo, JP;
Atsushi Kishimoto, Tokyo, JP;
Masamichi Tanaka, Tokyo, JP;
Keita Ishizaki, Utsunomiya, JP;
Katsunori Hanamura, Tokyo, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An object is to provide an exhaust gas purification filter that can achieve high trapping efficiency of particulate matter and low pressure loss, and the exhaust gas purification filter includes an inflow surface through which exhaust gas containing particulate matter flows in, a discharge surface from which purified gas is discharged, and a filter base body that is formed from a porous body, wherein the filter base body includes porous partition walls and gas flow paths surrounded by the partition walls, a porous film having a pore size smaller than that of pores of the partition walls is provided on each surface of the partition walls, and microgrooves having a depth shallower than the thickness of the porous film are formed on at least a part of a surface of the porous film.