Patents by Inventor Lee L. Hirsch

Lee L. Hirsch 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).

  • Hydrothermal drilling method and system
    Publication number: 20030121701
    Abstract: A method and system is disclosed for extending the depth of a subterranean borehole that uses heated aqueous fluid to dissolve rock of the subterranean formation. The heated aqueous fluid comprises water and hydroxides of Group I elements of The Periodic Table of Elements and mixtures thereof. The drilling system comprises means for delivering aqueous fluid and heating the aqueous fluid prior to contacting rock of a subsurface formation.
    Type: Application
    Filed: June 7, 2002
    Publication date: July 3, 2003
    Inventors: Richard S. Polizzotti, Lee L. Hirsch, Amy B. Herhold, Mehmet D. Ertas