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. 20, 2026
Filed:
Nov. 06, 2023
Ngk Insulators, Ltd., Nagoya, JP;
Takahiro Oneda, Kariya, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A honeycomb filter includes a honeycomb structure having a porous partition wall and a plurality of plugging portions, wherein a porosity of the plugging portion is 40 to 60%, a central plugging portion having a plugging length of 5 mm or more and an outer peripheral plugging portion having the plugging length of less than 5 mm are disposed, an average plugging length Lis 5 mm or more and 10 mm or less, an average plugging length Lis 2 mm or more and less than 5 mm, a difference between Land Lis 2 to 6 mm, a ratio of an average radius of the center part to an equivalent circle radius of the end face is 0.2 to 0.5, the plugging portion is composed of a plurality of particles, an average value of an equivalent circle diameter of each particle is 3 to 5 μm, and a particle density is 750 to 1250 particles/mm.