Patents by Inventor Christian C. Koppernaes

Christian C. Koppernaes 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 for making a pultruded panel
    Patent number: 5286320
    Abstract: A method for continuously manufacturing a composite sandwich structure by pultrusion through a pultrusion die comprises arranging fiber reinforcement materials on the surface of a preformed foam core, applying liquid resin to the reinforcement materials on the surface of the foam core, heating the surface region of the foam core to a temperature of at least 100.degree. C. to convert water in the foam core to steam, thereby causing water vapor pressure expansion of the foam, and using the expansion of the foam core to subject the liquid resin to increased pressure.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: February 15, 1994
    Assignee: Owens-Corning Fiberglas Technology Inc.
    Inventors: Ralph D. McGrath, J. Gordon Murphy, Peter R. Mitchell, Christian C. Koppernaes