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:
Jan. 01, 2013
Filed:
Mar. 12, 2012
Takashi Mizutani, Tokoname, JP;
Shingo Iwasaki, Gifu, JP;
Yukio Miyairi, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A honeycomb filterincludes a plurality of porous partition portionsforming a plurality of cellsserving as channels of fluid and trapping layersthat are formed on the partition portions and configured to trap a solid component contained in the fluid. In the honeycomb filter, a predetermined trapping region present on the partition portionssatisfies that, in an inscribed-circle-diameter distribution obtained by dividing an image of the partition portions captured with an electron microscope into a material region and a plurality of pore regions and by drawing maximum inscribed circles individually inscribed in the pore regions, a median pore diameter D50 is 1 μm or more and 6 μm or less and a median pore diameter D80 is 1 μm or more and 7 μm or less, and an inscribed-circle porosity determined from the inscribed-circle-diameter distribution is 35% or more and 60% or less.