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:
Oct. 31, 2017
Filed:
Aug. 31, 2015
Ngk Insulators, Ltd., Nagoya, JP;
Yukio Miyairi, Nagoya, JP;
Kazuhiko Kumazawa, Nagoya, JP;
Toshihiro Hirakawa, Nagoya, JP;
Toshio Yamada, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
The honeycomb filter includes a honeycomb substrate having porous partition walls defining a plurality of cells and plugging portions. In a cross section, the cells are arranged so that a periphery of an inlet plugged cell including an open end whose shape is a square in which a length of one side is Lis surrounded with four rectangular outlet plugged cells each including an open end whose shape is a rectangle in which a length of one side is Land a length of the other side is L(L>L) and four square outlet plugged cells each including an open end whose shape is a square in which a length of one side is L. A partition wall center distance a, a partition wall center distance b and a partition wall thickness t satisfy the following equation (1):0.95<  (1).