Patents by Inventor Charles M. Willwerth

Charles M. Willwerth 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).

  • Electromagnetic interference and radio frequency absorbing material and process for forming the same
    Patent number: 8679393
    Abstract: A method for producing an EMI/RF absorbing material including dispersing metallic flakes in a resin. The method also includes providing a first coat of the resin containing dispersed metallic flake to form a first layer. The method further includes providing a second coat of the resin containing dispersed metallic flake to the first layer to form a second layer. At least one of the first or second layers has a substantially uniform distribution of metallic flake throughout a thickness of the first or second layers.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 25, 2014
    Assignee: Majilite Corporation
    Inventors: Charles M. Willwerth, Himanshu R. Patel, Matthew D. Dodier, John V. Kapeckas
  • Electromagnetic interference and radio frequency absorbing material and process for forming the same
    Patent number: 7897882
    Abstract: An EMI/RF absorbing film may comprise a polymer resin, and metallic flakes dispersed in the resin. A method for manufacturing an EMI/RF absorbing material. The method may include dispersing metallic flake in the polymer resin, applying the polymer resin and dispersed metallic flake on a releasable medium, curing the polymer resin to form a film, and releasing the cured polymer resin film from the release medium.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: March 1, 2011
    Assignee: Majilitie Corporation
    Inventors: Charles M. Willwerth, Himanshu R. Patel, Matthew D. Dodier, John V. Kapeckas
  • Bias stretching apparatus for imitation-leather
    Patent number: 4233012
    Abstract: A diagonal bias-stretching device and a method of enhancing surface grain of imitation-leather material with such device, which device comprises a reciprocating roller moving between lateral positions on either side of a line of advance of an imitation-leather material, to provide for alternating diagonal stretching and relaxing of the material as it moves under tension in the line of advance.
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: November 11, 1980
    Assignee: Compo Industries, Inc.
    Inventors: Charles M. Willwerth, John P. Silvia
  • Imitation-leather, bias-stretching process
    Patent number: 4140827
    Abstract: A diagonal bias-stretching device and a method of enhancing surface grain of imitation-leather material with such device, which device comprises a reciprocating roller moving between lateral positions on either side of a line of advance of an imitation-leather material, to provide for alternating diagonal stretching and relaxing of the material as it moves under tension in the line of advance.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: February 20, 1979
    Assignee: Compo Industries Inc.
    Inventors: Charles M. Willwerth, John P. Silvia