US 12,214,524 B2
Rectangular outlet honeycomb structures, particulate filters, extrusion dies, and method of manufacture thereof
Douglas Munroe Beall, Painted Post, NY (US); Suhao He, Ithaca, NY (US); Achim Karl-Erich Heibel, Corning, NY (US); Kenneth Richard Miller, Addison, NY (US); Pushkar Tandon, Painted Post, NY (US); and David John Thompson, Savona, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Apr. 14, 2023, as Appl. No. 18/300,466.
Application 18/300,466 is a continuation of application No. 17/481,830, filed on Sep. 22, 2021, granted, now 11,654,592.
Application 17/481,830 is a continuation of application No. 16/095,596, granted, now 11,148,089, issued on Oct. 19, 2021, previously published as PCT/US2017/029159, filed on Apr. 24, 2017.
Claims priority of provisional application 62/452,765, filed on Jan. 31, 2017.
Claims priority of provisional application 62/326,384, filed on Apr. 22, 2016.
Prior Publication US 2023/0294324 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 46/24 (2006.01); B28B 3/26 (2006.01); F01N 3/022 (2006.01)
CPC B28B 3/269 (2013.01) [B01D 46/247 (2013.01); B01D 46/2482 (2021.08); B01D 46/2484 (2021.08); B01D 46/2486 (2021.08); B01D 46/249 (2021.08); F01N 3/0222 (2013.01); F01N 2330/34 (2013.01); Y02T 10/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A particulate filter comprising: a honeycomb structure comprising a matrix of intersecting porous cell walls extending in an axial direction between an inlet end and an outlet end of the honeycomb structure, the matrix defining a plurality of inlet cells and outlet cells, and corresponding inlet channels and outlet channels defined by respective inlet cells and respective outlet cells, wherein a cross-sectional area of at least a portion of the outlet channels is larger than a cross-sectional area of any of the inlet channels, there are 3 or more times as many inlet channels as outlet channels, and at least some of the outlet channels comprise a rectangular shape in cross-section, wherein either (a) the cross-sectional area of some of the outlet channels is greater than or equal to twice the cross-sectional area of an inlet channel, or (b) the rectangular shape comprises an outlet length Lo that is more than twice an inlet length Li across an inlet channel in a plane perpendicular to the axial direction; and
wherein the matrix comprises a plurality of repeating structural units, each repeating structural unit comprising a group of walls defining a respective outlet channel and a plurality of abutting inlet channels adjacent the respective outlet channel.