Patents by Inventor John W. Stang

John W. Stang 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).

  • Restricted expansion foaming and the flexible polyurethane foam thereby produced
    Patent number: 4777186
    Abstract: Polyurethane foams having improved physical properties are produced by placing a polymerizable polyurethane reaction mixture into a pressurizable chamber, then polymerizing the reaction mixture at an elevated pressure sufficient to prevent the resulting polymer from completely filling the chamber.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: October 11, 1988
    Assignee: Scotfoam Corporation
    Inventors: John W. Stang, John R. Rucker