Patents by Inventor David R. Wetzel

David R. Wetzel 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).

  • Fiber-reinforced composite materials
    Patent number: 4388422
    Abstract: A composite plastic material having improved shielding against electromagnetic interference is provided by injection molding a molding compound comprising elongated granules obtained by incorporating into a thermoplastic resin matrix metallized glass fibers together with carbon fibers.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: June 14, 1983
    Assignee: Dart Industries Inc.
    Inventors: Steven R. Gerteisen, David R. Wetzel