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:
Mar. 05, 2013
Filed:
Nov. 30, 2007
Toshitaka Ishizawa, Moka, JP;
Toshitaka Ishizawa, Moka, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A ceramic honeycomb filter comprising a honeycomb structure having large numbers of flow paths partitioned by porous cell walls, and plugs alternately formed in the flow paths on the exhaust-gas-inlet and outlet sides, the area ratio of pores opening at the cell wall surfaces being 20% or more, porous, cross-linked structures being formed by heat-resistant particles introduced together with a gas into penetrating holes constituted by communicating pores in the cell walls, such that they clog the penetrating holes, and the cross-linked structures being formed more on the exhaust-gas-outlet side of the ceramic honeycomb filter than on the exhaust-gas-inlet side.