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:
Oct. 22, 1991
Filed:
Jun. 18, 1990
Norman Jorgensen, Reading, GB;
Michael J Davies, Wallingford, GB;
James A Cairns, Dundee, GB;
Paul G Deards, Reading, GB;
Abstract
A catalyst for the oxidation of carbonaceous particulates carried in a gaseous phase, for example for the treatment of Diesel engine exhaust emissions, comprises a substrate for permitting flow of the gaseous phase therethrough coated with a high surface area ceramic oxide (for example alumina made by a vapor phase condensation method such as flame hydrolysis), cerium(IV) oxide, and a compound such as an oxide, carbonate or nitrate of an element of Group 1A of the Periodic Table. The substrate may be in the form of a ceramic honeycomb such as of cordierite, or of metal sheets (e.g. of an aluminium bearing ferritic alloy) shaped and wound to define gas flow channels, or of ceramic or metal foams, particles or wires in random or structured arrangement. The catalyst may include other components (e.g. transition metals such as Co, Cu, and Mn; Pb; and precious metals such as Pt and Pd) for enhancing performance.