Patents by Inventor Corey Stefanick

Corey Stefanick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • CATALYSTS, SYSTEMS, AND METHODS FOR REDUCING NOx IN AN EXHAUST GAS
    Publication number: 20100101221
    Abstract: Catalysts, systems, and methods disclosed herein provide for reduced NOx emissions in the exhaust stream of a lean burning engine. The catalysts include two different types of selective catalytic reduction (SCR) catalysts (i.e., two different types of catalysts that may catalytically reduce NOx using a reductant). The first SCR catalyst (116) is an SCR catalyst having a composition that produces a reductant (e.g., an HC-SCR catalyst that produces ammonia) and the second catalyst (118) is an SCR catalyst (e.g., NH3-SCR) having a composition that reduces NOx using the reductant produced by the first SCR catalyst (116).
    Type: Application
    Filed: October 28, 2008
    Publication date: April 29, 2010
    Applicant: Caterpillar Inc.
    Inventors: Sylvain Joseph Charbonnel, Zhiyong Wei, James Joshua Driscoll, Ronald Silver, Corey Stefanick