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:
Feb. 05, 2008
Filed:
Sep. 16, 2003
Sungtae Hong, Gifu, JP;
Teruo Komori, Gifu, JP;
Kazushige Ohno, Gifu, JP;
Ibiden Co., Ltd., Ogaki-shi, JP;
Abstract
A filter has a honeycomb structural body having a plurality of large-capacity through holes and small-capacity through holes placed in parallel with one another in a length direction. A total (a) of lengths in the cross section of wall surfaces of one large-capacity through hole, the wall surfaces being shared by the one large-capacity through hole and adjacent large-capacity through holes to a total (b) of lengths in the cross section of wall surfaces of one large-capacity through hole, the wall surfaces being shared by the one large-capacity through hole and adjacent small-capacity through holes is defined as α. A ratio (A/B) of the area (A) of the cross section of the one large-capacity through hole to the area (B) of the cross section of one of the adjacent small-capacity through holes is defined as β. The α and β satisfy the relationship represented by the formulas:0<α≦1.5 and 2<β≦2.75, and β≧(20/9)α+.