Patents by Inventor Francis J. Duszak

Francis J. Duszak 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).

  • Method and composition for maintaining and repairing asphalt-and rubber-containing surfaces
    Patent number: 4492781
    Abstract: Method and composition for protecting, maintaining and repairing paved surfaces utilizing a workable fiber-containing asphalt and/or latex emulsion in combination with an active amount of a water-soluble polymer material differing in ionic characteristics from the emulsion or emulsifier component thereof.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: January 8, 1985
    Inventors: Francis J. Duszak, James P. Modrak, Dick Deaver