Patents by Inventor Karl R. Grimston

Karl R. Grimston 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).

  • Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
    Patent number: 7143578
    Abstract: A diesel engine aftertreatment exhaust system uses catalyzed soot filters for particulate matter reduction and urea SCR catalysts for NOx reduction on diesel engines in a combined system to lower particulate matter and NOx at the same time. With this integral emission control system, diesel engines are able to meet ultra low emission standards.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: December 5, 2006
    Assignee: Engelhard Corporation
    Inventors: Ramesh M. Kakwani, Kenneth C. Voss, Joseph A. Patchett, Karl R. Grimston
  • Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
    Patent number: 6826906
    Abstract: A diesel engine aftertreatment exhaust system uses catalyzed soot filters for particulate matter reduction and urea SCR catalysts for NOx reduction on diesel engines in a combined system to lower particulate matter and NOx at the same time. With this integral emission control system, diesel engines are able to meet ultra low emission standards.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: December 7, 2004
    Assignee: Engelhard Corporation
    Inventors: Ramesh M. Kakwani, Kenneth C. Voss, Joseph A. Patchett, Karl R. Grimston
  • Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
    Publication number: 20020044897
    Abstract: A diesel engine aftertreatment exhaust system uses catalyzed soot filters for particulate matter reduction and urea SCR catalysts for NOx reduction on diesel engines in a combined system to lower particulate matter and NOx at the same time. With this integral emission control system, diesel engines are able to meet ultra low emission standards.
    Type: Application
    Filed: March 23, 2001
    Publication date: April 18, 2002
    Inventors: Ramesh M. Kakwani, Kenneth C. Voss, Joseph A. Patchett, Karl R. Grimston