Patents by Inventor Paul D. Ringgengberg

Paul D. Ringgengberg 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).

  • Downhole sealing tools and method of use
    Publication number: 20040069485
    Abstract: A downhole tool apparatus for insertion into and sealing engagement with a wellbore. The apparatus comprises a tube having an expandable diameter, and a gripping member joined to the tube adapted to engage a portion of the wellbore to limit movement of the tube within the wellbore. The tube may also include a sealing member adapted to mate with the wellbore to form a sealing engagement.
    Type: Application
    Filed: October 9, 2002
    Publication date: April 15, 2004
    Inventors: Paul D. Ringgengberg, Gregory W. Vargus, Lee Wayne Stepp, Donald R. Smith, Ronald L. Hinkie, Don S. Folds