Patents by Inventor Christopher D. Dunn

Christopher D. Dunn 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).

  • INERT HIGH HARDNESS MATERIAL FOR TOOL LENS PRODUCTION
    Publication number: 20140072469
    Abstract: In one aspect, tungsten carbide material systems are described herein which, in some embodiments, can provide desirable characteristics including chemical inertness, high hardness, reduced sensitivity to local compositional fluctuations and/or enhanced machining properties. In some embodiments, a tungsten carbide material described herein comprises 5.85-6.13 wt. % carbon, 0.85-1.05 wt. % chromium, less than 0.3 wt. % binder, less than 0.3 wt. % impurities and a balance being tungsten.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Applicant: Kennametal Inc.
    Inventors: Elizabeth Ann Binky Sargent, Sudhir Brahmandam, Christopher D. Dunn, Irene Spitsberg, Michael James Verti, William Roy Huston
  • Kinetic energy penetrator
    Patent number: 8171851
    Abstract: A kinetic energy penetrator is provided comprising a consolidated body of a metal nanoparticles phase comprising metal nanoparticles and a metal carbide nanoparticles phase comprising metal carbide nanoparticles. Methods for making a kinetic energy penetrator as well as material compositions comprising a consolidated body of a metal nanoparticles phase comprising metal nanoparticles and a metal carbide nanoparticles phase comprising metal carbide nanoparticles are also provided.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: May 8, 2012
    Assignee: Kennametal Inc.
    Inventors: David R. Siddle, Christopher D. Dunn