Patents by Inventor Paul R. Purvis

Paul R. Purvis 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).

  • Anti-static device
    Patent number: 5726143
    Abstract: The present invention relates to an article for improving anti-static protection of clothing dried in a clothes dryer. The article includes a substrate, a layer comprising a first quaternary ammonium anti-static agent that has a first melting point. The layer comprising the first quaternary ammonium anti-static agent is adhered to the substrate. The article also includes a layer comprising a second quaternary ammonium anti-static agent that is adhered to the first quaternary ammonium anti-static agent. The layer comprising the second quaternary ammonium anti-static agent has a melting point lower than the first melting point. The present invention also includes a method for making the article.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: March 10, 1998
    Inventors: Teresa M. Petraia, Paul R. Purvis, William T. Ahlborn