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:
Jun. 02, 2015
Filed:
Mar. 06, 2014
Johnson Matthey Public Limited Company, London, GB;
Philip Gerald Blakeman, Philadelphia, PA (US);
Gavin Michael Brown, Saffron Walden, GB;
Sougato Chatterjee, Wayne, PA (US);
Andrew Francis Chiffey, Ware, GB;
Jane Gast, Spring City, PA (US);
Paul Richard Phillips, Royston, GB;
Raj Rao Rajaram, Slough, GB;
Glen Spreitzer, Collegeville, PA (US);
Andrew Peter Walker, Hazlemere, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
A catalysed substrate monolithfor use in treating exhaust gas emitted from a lean-burn internal combustion engine, which catalysed substrate monolithcomprising a first washcoat coatingand a second washcoat coating, wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material for the at least one PGM, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one metal oxide for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating.