Patents by Inventor Stephen James Shaughnessy

Stephen James Shaughnessy 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).

  • Sound muffling material and method of making thereof
    Patent number: RE42634
    Abstract: A sound muffling material for use in combustion engine exhaust mufflers is provided. The material includes volumized fibers retained in compressed form by a material of lower softening temperature than the fibers. When the material is heated by exhaust gases, the material of lower softening temperature is softened allowing the compressed fibers to expand. The fibers may be formed into a knitted fabric retained by a sacrificial thread. The material may be used to support catalyst bricks.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: August 23, 2011
    Assignee: Acousta-Fil Limited
    Inventor: Stephen James Shaughnessy