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:
Jul. 18, 2017
Filed:
May. 16, 2014
Johnson Matthey Public Limited Company, London, GB;
David Bergeal, Ware, GB;
Andrew Francis Chiffey, Ware, GB;
Daniel Hatcher, Royston, GB;
James Leeland, Royston, GB;
Francois Moreau, Cambridge, GB;
Paul Richard Phillips, Royston, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
An oxidation catalyst for treating an exhaust gas from a compression ignition engine, which oxidation catalyst comprises: a first washcoat region comprising platinum (Pt) and a first support material, wherein the first washcoat region is substantially free of a hydrocarbon adsorbent; a second washcoat region comprising platinum (Pt), palladium (Pd) and a second support material, wherein the second washcoat region has a ratio by mass of platinum (Pt) to palladium (Pd) of 4:1 to 1:1; a hydrocarbon adsorbent; and a substrate; wherein the first washcoat region is arranged to contact inlet exhaust gas before the hydrocarbon adsorbent, and the first washcoat region is arranged to contact inlet exhaust gas before the second washcoat region.