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. 01, 2014
Filed:
May. 25, 2012
Gongshin Qi, Troy, MI (US);
Wei LI, Troy, MI (US);
Xinquan Wang, Tianjin, CN;
Meiqing Shen, Nankai District, CN;
Gongshin Qi, Troy, MI (US);
Wei Li, Troy, MI (US);
Xinquan Wang, Tianjin, CN;
Meiqing Shen, Nankai District, CN;
GM Global Technology Operations LLC, Detroit, MI (US);
Tianjin University, Tianjin, CN;
Abstract
A non-stoichiometric perovskite oxide having the general chemical formula LaMnO, in which the molar ratio of lanthanum to manganese ('X') ranges from 0.85 to 0.95, can be used in particle form as an oxidation catalyst to oxidize NO to NOin an exhaust aftertreatment system for a hydrocarbon-fueled engine. The oxygen content ('Y') fluctuates with variations in the molar ratio of lanthanum to manganese but generally falls somewhere in the range of 3.0 to 3.30. The crystal lattice adjustments spurred by the non-stoichiometric molar ratio of lanthanum to manganese are believed responsible for an enhanced NO oxidative activity relative to similar perovskite oxides with a higher molar ratio of lanthanum and manganese.