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:
Apr. 21, 2020
Filed:
Jan. 17, 2017
Applicant:
Cummins Inc., Columbus, IN (US);
Inventors:
Askok Kumar, Columbus, IN (US);
Krishna Kamasamudram, Columbus, IN (US);
Jinyong Luo, Columbus, IN (US);
Assignee:
Cummins Inc., Columbus, IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/20 (2006.01); B01J 35/00 (2006.01); B01J 29/072 (2006.01); F01N 3/035 (2006.01); F01N 3/28 (2006.01); B01D 53/94 (2006.01); B01J 29/076 (2006.01); B01J 23/22 (2006.01); F01N 13/00 (2010.01); F01N 3/10 (2006.01);
U.S. Cl.
CPC ...
F01N 3/2803 (2013.01); B01D 53/9418 (2013.01); B01D 53/9477 (2013.01); B01J 23/22 (2013.01); B01J 29/072 (2013.01); B01J 29/076 (2013.01); B01J 35/0006 (2013.01); F01N 3/035 (2013.01); F01N 3/106 (2013.01); F01N 3/2066 (2013.01); F01N 13/009 (2014.06); F01N 13/0097 (2014.06); B01D 2255/20723 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2255/904 (2013.01); B01D 2255/9032 (2013.01); B01D 2255/911 (2013.01); B01D 2255/9155 (2013.01); B01D 2258/012 (2013.01); F01N 2370/04 (2013.01); F01N 2510/063 (2013.01); F01N 2510/0682 (2013.01); F01N 2610/02 (2013.01); Y02T 10/24 (2013.01);
Abstract
Unique SCR catalyst including multiple washcoat formulations with differing performance characteristics are disclosed. One exemplary embodiment is an apparatus including a catalyst substrate defining a plurality of flow channels leading from an inlet to an outlet, a first washcoat composition distributed over a first portion of the flow channels, and a second washcoat composition distributed over a second portion of the flow channels. The first washcoat composition has a lower ammonia storage density than the second washcoat composition.