Patents by Inventor Warren F. Legg

Warren F. Legg 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).

  • Fire-retardant polymer foam composites
    Patent number: 5137777
    Abstract: A fire retardant polymer foam composite suitable for the making of packaging material, including a thin film of fire-retardant plastic extruded between layers of polymer foam sheets and bonded together to form a composite sheet of material having a sandwich structure.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: August 11, 1992
    Assignee: Ametek
    Inventors: Lance D. Silverman, Warren F. Legg, Wilfred E. Willis
  • Variable thickness foam plank
    Patent number: 5066531
    Abstract: A process for hot pin perforation bonding of a plurality of lamina of thermoplastic foam sheet material to produce a controllably rigid, strong, lightweight and easily shaped cushioned foam plank; and a product as formed in that process.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: November 19, 1991
    Assignee: Ametek
    Inventors: Warren F. Legg, Wilfred E. Willis