Patents by Inventor Walter Cullen Lucas

Walter Cullen Lucas 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 after treatment system and method
    Publication number: 20100050874
    Abstract: An exhaust after treatment system includes a wall-flow particulate filter and a flow-through substrate positioned upstream of the filter. The substrate has a plurality of channels defining a mean channel length, a first flow-through region including a first portion of the channels, and a second flow-through region including a second portion of the channels. The first flow-through region includes unplugged channels having lengths less than the mean channel length and the second flow-through region includes unplugged channels having lengths greater than the mean channel length.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 4, 2010
    Inventors: Walter Cullen Lucas, Joel Andrew Schultes