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. 03, 2014
Filed:
Oct. 20, 2011
Jonathan Ashley Cooper, Bishops Stortford, GB;
Michael Anthony Howard, Royston, GB;
Jonathan Ashley Cooper, Bishops Stortford, GB;
Michael Anthony Howard, Royston, GB;
Johnson Matthey PLC, London, GB;
Abstract
A NOstorage component comprises caesium silicate (CsSiO) and at least one platinum group metal. The invention also includes a NOabsorber catalyst comprising a NOstorage component according to the invention disposed on a substrate monolith; a method of treating exhaust gas containing NOfrom a lean burn internal combustion engine comprising the steps of contacting a NOstorage component comprising caesium silicate (Cs2SiO3) and at least one platinum group metal with lean exhaust gas containing NOto adsorb NOthereon; and periodically desorbing adsorbed NOby contacting the NOstorage component with stoichiometric or rich exhaust gas; and a method of making a NOstorage component according to the invention comprising the steps of combining and reacting an aqueous salt of at least one platinum group metal, an aqueous caesium salt and a source of silica.