Patents by Inventor Donald A. Micheletti

Donald A. Micheletti 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).

  • Flame coloring device
    Patent number: 4472135
    Abstract: A flame coloring device makes a flame, such as a flame from a propane burner, visible even when the burner is used outdoors or in a bright environment. The device includes a carrier adapted for placement on the burner barrel and a solid colorant emitter such as sodium chloride supported by the carrier. When the carrier and colorant emitter are heated by the burner flame, the emitter emits a material that provides visible light, thereby defining the flame.
    Type: Grant
    Filed: February 23, 1982
    Date of Patent: September 18, 1984
    Assignee: Raychem Corporation
    Inventors: Robert Parker, Thomas D. Ratzlaff, Donald A. Micheletti