Compositions: ceramic – Ceramic compositions – Pore-forming
Reexamination Certificate
2005-03-08
2005-03-08
Sample, David (Department: 1755)
Compositions: ceramic
Ceramic compositions
Pore-forming
C501S081000, C501S119000, C501S153000, C501S154000
Reexamination Certificate
active
06864198
ABSTRACT:
A cordierite ceramic body having (i) a pore size distribution and a porosity which satisfy the relationship 10.2474/[(d50)2(pore fraction)]+0.0366183(d90)−0.00040119(d90)2+0.468815(1/pore fraction)2+0.0297715(d50)+1.61639(d50−d10)/d50≦3.65, and (ii) a CTE (25°-800° C.) of ≦15×10−7/° C., wherein the cordierite ceramic body is produced from a moldable mixture comprising cordierite-forming raw materials including (a) a fine talc having a median particle diameter, as measured by laser diffraction, of less than 10 micrometers, and a B.E.T. specific surface area of greater than 5 m2/g, and (b) a pore former. The cordierite ceramic body is suitable in the fabrication of cellular, wall-flow diesel particulate filters having a low pressure drop, high filtration efficiency and improved strength.
REFERENCES:
patent: 3950175 (1976-04-01), Lachman et al.
patent: 4280845 (1981-07-01), Matsuhisa et al.
patent: 4632683 (1986-12-01), Fukutani et al.
patent: 4849725 (1989-07-01), Nakano et al.
patent: 5258150 (1993-11-01), Merkel et al.
patent: 5545243 (1996-08-01), Kotani et al.
patent: 5773103 (1998-06-01), Ciora et al.
patent: 6004501 (1999-12-01), Cornelius et al.
patent: 6087281 (2000-07-01), Merkel
patent: 6214437 (2001-04-01), Beall et al.
patent: 6432856 (2002-08-01), Beall et al.
patent: 20030007905 (2003-01-01), Tanaka et al.
patent: 0 753 490 (2002-01-01), None
patent: 1 184 066 (2002-06-01), None
patent: 2001-340718 (2001-12-01), None
patent: 0241972 (2002-05-01), None
Hashimoto et al., “SiC and Cordierite Diesel Particulate Filters Designed for Low Pressure Drop and Catalyzed, Uncatalyzed Systems”, SAE Technical Paper 2002-01-0322, p. 1-14.
Beall et al., U.S. Appl. No. 09/867,321, filed May 29, 2001, “Cordierite Body”.
Corning Incorporated
Gheorghiu Anca C.
Sample David
Sterre Kees van der
LandOfFree
Cordierite ceramic body and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cordierite ceramic body and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cordierite ceramic body and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3451836