Patents by Inventor William Joseph Napier

William Joseph Napier 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).

  • FLUOROPOLYMER ARTICLE FOR DOWNHOLE APPLICATIONS
    Publication number: 20160245042
    Abstract: A check valve for down-hole drilling applications may include a housing having a vent port and a chamber within the housing. The check valve may include a displaceable member within the chamber of the housing. An expanded polytetrafluoroethylene (ePTFE) membrane may be disposed over the vent port to protect the check valve from corrosion.
    Type: Application
    Filed: February 22, 2016
    Publication date: August 25, 2016
    Inventors: William Joseph Napier, Gary P. Harp