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:
Aug. 26, 2014
Filed:
Aug. 24, 2007
Douglas Munroe Beall, Painted Post, NY (US);
Achim Karl-erich Heibel, Corning, NY (US);
Pushkar Tandon, Painted Post, NY (US);
Douglas Munroe Beall, Painted Post, NY (US);
Achim Karl-Erich Heibel, Corning, NY (US);
Pushkar Tandon, Painted Post, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A thin-walled porous ceramic wall-flow filter is disclosed. The filter produces a relatively lower pressure drop coupled with relatively high initial filtration efficiency (FE), and may enable packaging the filter in a smaller volume. The filter includes a plurality of porous ceramic walls forming cell channels. At least some of the cells are plugged forcing some exhaust gases through the walls, thereby filtering out entrained particulates. The walls have a wall thickness (T) wherein 102 μm≦T<279 μm, and a median pore diameter (MPD), and wherein 10<T/MPD, and may also be <40. The relatively small median pore diameter (MPD) in comparison to the wall thickness (T) allows the use of thinner ceramic walls that provide less flow resistance than thicker walls while maintaining sufficient initial filtration efficiency (FE). Furthermore, such thin-walled filter structure coupled with unequal inlet/outlet area ratio (Ai/Ao) may allow filter lengths to be additionally shortened.