Patents by Inventor Richard Lee Frentzel

Richard Lee Frentzel 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).

  • Electrical device containing positive temperature coefficient resistor composition and method of manufacturing the device
    Patent number: 5993698
    Abstract: A positive temperature coefficient (PTC) resistor composition, comprising: (a) about 3% to about 75% by weight of a binder resin, (b) about 0.5% to about 70% by weight of a temperature activatable semicrystalline polymer, which is a thermoplastic elastomer (TPE) that melts at a relatively narrow temperature range to change from a crystalline state to an amorphous state, (c) about 10% to about 80% by weight of an electrically conductive material in finely particulated form selected from the group consisting of silver, graphite, graphite/carbon, nickel, copper, silver coated copper, and aluminum, (d) about 0.01% to about 80% by weight of solvent material for the composition.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: November 30, 1999
    Assignee: Acheson Industries, Inc.
    Inventors: Richard Lee Frentzel, Richard E. Bowns, Michael Kevin Munoz, Scott Timon Allen