Patents by Inventor William H. Gravitt

William H. Gravitt 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).

  • Portable chemical heater
    Patent number: 4725225
    Abstract: A portable chemical heater for cooking or warming food, the heater including a can filled with diethylene glycol fluid. The can is provided at its top with a protruding neck that is normally closed by a removable cap. Seated within the neck is a cup-shaped sealing insert having a bore therein through which projects the upper end of a wick. This wick is formed by a bundle of glass fibers, the remaining portion of the wick extending into the can and being immersed in the fluid.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: February 16, 1988
    Assignee: Scientific Utility Products, Inc.
    Inventor: William H. Gravitt