Patents by Inventor Nathan J. Harder

Nathan J. Harder 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).

  • Drill bit
    Patent number: 7258176
    Abstract: A drill bit for drilling a well bore using solid material impactors comprising a nozzle and a cavity for accelerating the velocity of the solid material impactors and directing flow of the solid material impactors through the nozzle. The drill bit may also comprise a junk slot for return flow of the drilling fluid and solid material impactors.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: August 21, 2007
    Assignee: Particle Drilling, Inc.
    Inventors: Gordon A. Tibbitts, Paul O. Padgett, Harry B. Curlett, Samuel R. Curlett, Nathan J. Harder