Patents by Inventor Hurshel V. Hendrix

Hurshel V. Hendrix 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).

  • Underground storage
    Patent number: 4117684
    Abstract: A method is provided for preventing the accidental discharge of hydrocarbon from an underground storage cavern by the use of a pressure-sensing element connected in a brine discharge tube near or above the ground with the pressure-sensing element being operable for providing a signal which is proportional to the pressure in the tubing. The signal is transmitted to a valve which closes when a predetermined pressure level is obtained, thereby preventing further flow of liquid through the discharge tubing.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: October 3, 1978
    Assignee: Phillips Petroleum Company
    Inventor: Hurshel V. Hendrix