Patents by Inventor David E. Ruffin

David E. Ruffin 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).

  • NOx conversion catalyst rejuvenation process
    Patent number: 6482762
    Abstract: A method for cleaning and rejuvenating an at least partially spent de-NOx catalyst comprising a porous ceramic metal oxide material containing a vanadium oxide and coated on a metal support by cleaning the catalyst with an oxalic acid solution and by contacting the catalyst with a vanadium compound solution.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: November 19, 2002
    Assignee: Atlantic Richfield Company
    Inventors: David E. Ruffin, Ryan M. Bonderson, Andrew P. Voss