Patents by Inventor Nathaniel A. Hardin

Nathaniel A. Hardin 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).

  • Constant head pump for sonic wave generator used in treating subsurface formations
    Patent number: 4945986
    Abstract: A sonic wave generating device transmits variable wave energy to a fluid medium that is transmitted to objects such as subsurface petroliforous formations to be treated. A feed pump which pumps the medium to the devices includes means to maintain an increased hydrostatic or positive head to the suction inlet to the feed pump which prevents or neutralizes feed back energy waves from the wave generating device to the feed pump.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: August 7, 1990
    Assignee: N.A. Hardin 1977 Trust, N.A. Hardin, Trustee
    Inventors: Nathaniel A. Hardin, George C. Morgan