Patents by Inventor Donald Nelson Grace

Donald Nelson Grace 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).

  • System, apparatus, and method for energy conversion
    Patent number: 11035260
    Abstract: A method to generate electrical power and cold energy from any grade of thermal energy (e.g., ambient, solar, waste heat, geothermal, combustion products, nuclear, or any combination thereof) in a cryogenic, closed loop (e.g., regenerative) cycle is disclosed.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: June 15, 2021
    Inventors: Aleksandr Kravets, Donald Nelson Grace