Patents by Inventor Franklin R. Amthor, Jr.

Franklin R. Amthor, Jr. 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).

  • Water heater apparatus
    Patent number: 4173872
    Abstract: A water heater, converted from existing water heaters or in newly designed and manufactured water heaters, having a condenser tube of a refrigeration unit in thermal conductive contact but not intimate contact with the water to be heated, and having a sheath tube in conjunction with and outwardly disposed to the said condenser tube, and having the inter-space or inter-spaces between the said condenser tube and the said sheath tube filled with thermal conductive material, said inter-space being open or fragilely rupturable to the outside of the water heater.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: November 13, 1979
    Assignee: Energy Utilization Systems, Inc.
    Inventor: Franklin R. Amthor, Jr.