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:
Mar. 24, 2015
Filed:
Mar. 06, 2014
Johnson Matthey Public Limited Company, London, GB;
Philip Gerald Blakeman, Philadelphia, PA (US);
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;
Andrew Peter Walker, Hazlemere, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
Methods are disclosed for reducing or preventing a selective catalytic reduction (SCR) catalyst disposed on a first substrate monolith in an exhaust system of a lean-burn internal combustion engine from becoming poisoned with platinum group metal (PGM) which may volatilize from a catalyst composition comprising PGM disposed on at least one second substrate monolith upstream of the SCR catalyst. The methods comprise adsorbing volatilized PGM in at least one PGM trapping material, which is disposed on a third substrate monolith disposed between the first substrate monolith and the second substrate monolith.