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. 21, 2013
Filed:
Oct. 21, 2009
Yukio Mizuno, Komaki, JP;
Naomi Noda, Ichinomiya, JP;
Toshio Yamada, Nagoya, JP;
Yukio Miyairi, Nagoya, JP;
Yukari Nakane, Nagoya, JP;
Yasushi Noguchi, Nagoya, JP;
Yukio Mizuno, Komaki, JP;
Naomi Noda, Ichinomiya, JP;
Toshio Yamada, Nagoya, JP;
Yukio Miyairi, Nagoya, JP;
Yukari Nakane, Nagoya, JP;
Yasushi Noguchi, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A honeycomb filter including partition walls having a porous partition wall base material and a surface layer provided on only inflow side or both inflow and outflow sides of the partition wall base material, and satisfying the following conditions capable of using as a DPF. The surface layer has a peak pore diameter of from 0.3 μm to 20 μm (exclusive) being equal to or smaller than the average pore diameter of the base material; the porosity of from 60% to 95% (exclusive) when measured by mercury porosimetry being larger than that of the base material; and the thickness Lof from 0.5% to 30% (exclusive) of the partition wall thickness L; and mass per filtration area of from 0.01 mg/cmto 6 mg/cm(exclusive). The base material has an average pore diameter of from 10 μm to 60 μm (exclusive) and a porosity of from 40% to 65% (exclusive).