Patents by Inventor Paul J. Dupont

Paul J. Dupont 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).

  • Patent number: D306975
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: April 3, 1990
    Assignee: Sweetheart Cup Company Inc.
    Inventors: James R. Brondyke, Paul J. Dupont