Patents by Inventor Edward C. Le Duc

Edward C. Le Duc 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).

  • Three layered foam-containing laminate suitable for use as an automobile headliner
    Patent number: 4363848
    Abstract: Laminate suitable for use as automobile trim panel or headliner comprising the following layers: (1) polypropylene fabric, (2) a solid layer comprising a physical mixture of a copolymer of styrene and maleic anhydride, preferably a rubber modified copolymer, and polypropylene and (3) a foam of a copolymer of styrene and maleic anhydride. The laminates can be shaped by thermoforming. Optionally the laminate can contain, on the foam side opposite the fabric, a sheet or film of a rubber modified copolymer of styrene and maleic anhydride.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: December 14, 1982
    Assignee: Standard Oil Company (Indiana)
    Inventors: Edward C. Le Duc, John C. Schubert
  • Wrinkle free extrusion coating of heat fusible foam sheet
    Patent number: 3957940
    Abstract: In a process for extrusion coating of both sides of a foamed polystyrene sheet with a rubber modified polystyrene the specific improvement of crushing the coated foam sheet such that it will rebound to only 30 to 70 percent of its original thickness results in a product of improved processing characteristics. This crushed sheet can be thermally formed into a wrinkle free china-like surface useful in making insulated dishes, trays, food containers and the like.
    Type: Grant
    Filed: May 31, 1974
    Date of Patent: May 18, 1976
    Assignee: Standard Oil Company
    Inventors: John C. Schubert, Edward C. Le Duc