Patents by Inventor Harold Smithson

Harold Smithson 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).

  • Catalyst changing system
    Patent number: 3964528
    Abstract: Unitary system for changing catalyst particles in a catalytic converter mounted in a vehicle exhaust system. The system attaches to and hangs from the converter, applied rotary off-center vibration, and collects the liberated particles in a self-supporting canister. Vacuum means, acting through the exhaust pipe, aids in starting the emptying process and acts to refill the converter.
    Type: Grant
    Filed: May 10, 1974
    Date of Patent: June 22, 1976
    Assignee: Oxy-Catalyst, Incorporated
    Inventors: Harold Smithson, John F. Stahl