Patents by Inventor James J. Underwood

James J. Underwood 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).

  • Pumped heat electric storage system with recirculation
    Patent number: 11852043
    Abstract: The present disclosure provides pumped thermal energy storage systems that can be used to store and extract electrical energy. A pumped thermal energy storage system of the present disclosure can store energy by operating as a heat pump or refrigerator, whereby net work input can be used to transfer heat from the cold side to the hot side. A working fluid of the system is capable of efficient heat exchange with heat storage fluids on a hot side of the system and on a cold side of the system. The system can extract energy by operating as a heat engine transferring heat from the hot side to the cold side, which can result in net work output.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: December 26, 2023
    Assignee: MALTA INC.
    Inventors: Benjamin R. Bollinger, Mert Geveci, Bao H. Truong, Erhan Karaca, Sebastian W. Freund, David M. Brantzeg, James J. Underwood, John S. Bowen, Roy T. Collins
  • PUMPED HEAT ELECTRIC STORAGE SYSTEM
    Publication number: 20220389839
    Abstract: The present disclosure provides pumped thermal energy storage systems that can be used to store and extract electrical energy. A pumped thermal energy storage system of the present disclosure can store energy by operating as a heat pump or refrigerator, whereby net work input can be used to transfer heat from the cold side to the hot side. A working fluid of the system is capable of efficient heat exchange with heat storage fluids on a hot side of the system and on a cold side of the system. The system can extract energy by operating as a heat engine transferring heat from the hot side to the cold side, which can result in net work output.
    Type: Application
    Filed: November 16, 2020
    Publication date: December 8, 2022
    Inventors: Benjamin R. Bollinger, Mert GEVECI, Bao H. TRUONG, Erhan KARACA, Sebastian W. FREUND, David M. BRANTZEG, James J. UNDERWOOD, John S. BOWEN, Roy T. COLLINS
  • Enterobacteriaceae species biochemical test card
    Patent number: 4318994
    Abstract: An improved card for use in an automated machine to detect the continued existence of microbes in a plurality of wells containing different media so that the organism can be speciated. The card includes an improved configuration wherein the wells have different reduced oxygen environments and all of the wells have an improved bubble chamber connected to the well by a bifurcated passage.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: March 9, 1982
    Assignee: McDonnell Douglas Corporation
    Inventors: Michael C. Meyer, Leodis V. Woods, James J. Underwood, Ralph Wilkinson, Victoria Stratman