Patents by Inventor George Tradewell

George Tradewell 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).

  • Partially-carbonized polyacrylonitrile filter
    Patent number: 4444574
    Abstract: A filter for extracting solids and liquids from gaseous combustion exhausts comprises a textile filter element formed of polyacrylonitrile fibers oxidized by careful heat treatment and comprising approximately 61% carbon after treatment. The filter may be woven, knitted or formed as a batting of randomly-oriented fibers. Abrasion resistant coatings and lubricants for the fibers are disclosed. The filter material is especially useful as a filter bag.
    Type: Grant
    Filed: October 6, 1982
    Date of Patent: April 24, 1984
    Inventors: George Tradewell, W. Novis Smith