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:
Nov. 08, 2016
Filed:
Dec. 19, 2012
Johnson Matthey Public Limited Company, London, GB;
Daniel Swallow, Sandy, GB;
Paul Richard Phillips, Royston, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
A NOtrap, and its use in an exhaust system for internal combustion engines, is disclosed. The NOtrap comprises a substrate and three layers on the substrate. The first layer comprises a first platinum group metal, a first NOstorage component, and a first support; the second layer comprises a second platinum group metal, a second NOstorage component, and a second support; and the third layer comprises rhodium and a third support. The platinum group metal loading in the first layer is from 1 to 40 percent of the platinum group metal loading in the second layer. In addition, the first NOstorage component and the second NOstorage component are the same, and the first support and the second support are the same. The NOtrap is less prone to deactivation over numerous desulfation/NOtrap regeneration cycles.