Patents by Inventor Shannon Dowdell

Shannon Dowdell 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).

  • Liquid resistant face mask having surface energy reducing agent on an intermediate layer therein
    Patent number: 5706804
    Abstract: A face mask including a face-contacting layer, an outer cover layer, a polymeric microfiber mat disposed between the face-contacting layer and the outer cover layer, and a non-woven fibrous mat disposed between the face-contacting layer and the outer cover layer. The non-woven fibrous mat includes polymeric fibers and a surface energy reducing agent. The face-contacting layer, the cover layer, the polymeric microfiber mat, and the non-woven fibrous mat cooperate with each other to allow gas to pass through the mask while inhibiting the passage of liquid through the mask.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: January 13, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nicholas R. Baumann, John M. Brandner, John A. Temperante, Shannon Dowdell, Michael D. Romano, Scott J. Tuman, Matthew T. Scholz