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:
Nov. 10, 2020
Filed:
Mar. 29, 2018
Johnson Matthey Public Limited Company, London, GB;
Hai-Ying Chen, Wayne, PA (US);
Joseph Michael Fedeyko, Wayne, PA (US);
Neil Greenham, Royston, GB;
Mikael Larsson, Gothenburg, SE;
Jing Lu, Wayne, PA (US);
Per Marsh, Gothenburg, SE;
David Micallef, Royston, GB;
Andrew Newman, Royston, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
A catalyst article including a substrate with an inlet end and an outlet end, a first zone and a second zone, where the first zone comprises: a) an ammonia slip catalyst (ASC) bottom layer comprising a platinum group metal on a support; and b) an SCR layer comprising a second SCR catalyst, the SCR layer located over the ASC bottom layer; where the second zone comprises a catalyst ('second zone catalyst') selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); wherein the ASC bottom layer extends into the second zone; and where the first zone is located upstream of the second zone. The ASC bottom layer may include a blend of: (1) the platinum group metal on a support and (2) a first SCR catalyst.