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:
Jul. 18, 2017
Filed:
Sep. 24, 2014
Hitachi Metals, Ltd., Tokyo, JP;
Shunji Okazaki, Miyako-gun, JP;
HITACHI METALS, LTD., Tokyo, JP;
Abstract
A cordierite-type ceramic honeycomb structure having large numbers of flow paths partitioned by porous cell walls; the cell walls having (a) porosity of more than 65% and 75% or less, (b) in a pore diameter distribution measured by mercury porosimetry, (i) a pore diameter dat a cumulative pore volume corresponding to 10% of the total pore volume being less than 50 μm, a pore diameter (median pore diameter) dat 50% being 18-27 μm, a pore diameter dat 90% being 10 μm or more, and (d−d)/dbeing 2.3 or less; (ii) σ[=log(d)−log(d)] being 0.25 or less, wherein σ represents the difference between a logarithm of a pore diameter dat a cumulative pore volume corresponding to 20% of the total pore volume and a logarithm of a pore diameter dat a cumulative pore volume corresponding to 80% of the total pore volume; and (iii) the maximum of the inclination S=−(V−V)/[log(d)−log(d)] of a curve of a cumulative pore volume to a pore diameter being 3 or more, wherein dand Vare respectively a pore diameter and a cumulative pore volume at an n-th measurement point, and dand Vare respectively a pore diameter and a cumulative pore volume at a (n−1)-th measurement point.