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. 31, 1998
Filed:
Aug. 13, 1996
Applicant:
Inventors:
Mitsushige Ogawa, Omuta, JP;
Yasuo Imamura, Omuta, JP;
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C04B / ;
U.S. Cl.
CPC ...
55523 ; 55DI / ; 428116 ; 60311 ;
Abstract
A honeycomb structure having a porous cell wall, wherein the surface roughness of the cell wall is at least 30 .mu.m. The open pore diameter at the cell wall surface is at least 10 .mu.m and the porosity of the cell wall is at least 40%. The honeycomb structure is made of alumina, cordierite, mullite, silicon nitride or aluminum nitride. In the alternative, the honeycomb structure may be made of silicon carbide. The honeycomb structure is used to form a diesel particulate filter.