Patents by Inventor Laurence D. Marks

Laurence D. Marks 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).

  • Reduced-friction coatings
    Publication number: 20090074522
    Abstract: A coating is provided having a first metal or non-metal nitride layer and a second metal or non-metal nitride layer wherein the first and second nitride layers are sufficiently resistant to interdiffusion to maintain respective individual layer structure and strength at an elevated operating temperature when a coating contact surface is in sliding contact with another material and wherein one of the first layer or second layer includes a component that is oxidizable at the contact surface to form a friction-reducing lubricous oxide material at the contact surface.
    Type: Application
    Filed: September 16, 2008
    Publication date: March 19, 2009
    Inventors: Michael E. Graham, Robin A. Koshy, Laurence D. Marks