Patents by Inventor David K. Matlock

David K. Matlock 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).

  • Process for making a metallic article with improved resistance to surface cracking during cold forming
    Patent number: 4883545
    Abstract: A process for improving the cold workability of a metallic article is disclosed. The process includes compressive working followed by heat treatment of a metallic article to provide a duplex microstructure including relatively fine grains near the surface and relatively coarse grains near the center of the article. The duplex microstructure improves the surface cracking resistance of the article during subsequent compressive cold forming, such as by cold heading.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: November 28, 1989
    Assignee: Colorado School of Mines
    Inventors: David K. Matlock, Michael P. Riendeau, Mark L. Robinson