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:
Feb. 25, 2020
Filed:
Jan. 05, 2016
Denso Corporation, Kariya, Aichi-pref., JP;
Hironori Niwa, Kariya, JP;
Syusaku Yamamura, Kariya, JP;
Mikio Ishihara, Kariya, JP;
Takao Mishima, Kariya, JP;
Shingo Nakata, Kariya, JP;
Hiroaki Fujii, Kariya, JP;
Kouta Yamakoshi, Kariya, JP;
Akira Miyashita, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An exhaust gas filter purifies exhaust gas containing particulate matter emitted from an engine. The filter has cell walls and cells surrounded by the cell walls. Through pores formed in the cell walls, adjacent cells are communicated. The cells have open cells opening along an axial direction of the filter, and plugged cells. An upstream end part of the plugged cell is plugged by a plug member. On a cross section perpendicular to the axial direction, a flow-passage sectional area of the plugged cells is larger than a flow-passage sectional area of the open cells. A total length of the filter is not less than a first standard value and is not more than a critical length Lm determined by respective predetermined equations.