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. 23, 2021
Filed:
Mar. 06, 2020
Johnson Matthey Public Limited Company, London, GB;
Gregory Gregori, Royston, GB;
Paul Phillips, Royston, GB;
Julian Pritzwald-Stegmann, Wayne, PA (US);
Stuart David Reid, Royston, GB;
Wolfgang Strehlau, Sulzbach, DE;
Johnson Matthey Public Limited Company, London, GB;
Abstract
A lean NOtrap catalyst and its use in an emission treatment system for internal combustion engines is disclosed. The lean NOtrap catalyst comprises a first layer for storing nitrogen oxides (NOx) under lean exhaust gas conditions and releasing and/or reducing stored NOx during rich exhaust gas conditions, and a second layer, said second layer comprising a first zone for oxidizing carbon monoxide (CO) and/or hydrocarbons (HC), and a second zone for oxidizing nitric oxide (NO), and a substrate having an inlet end and an outlet end.