Patents by Inventor Keith C. Andersen

Keith C. Andersen 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).

  • Process for manufacturing multilayer sheet material
    Patent number: 5514239
    Abstract: A multilayer sheet material that is capable of being adhered to a foamed polymer core material is prepared from at least four layers, which are a first outer layer of a printable sheet material, an inner layer of a fibrous sheet material, an inner layer of an adhesive material, and a second outer layer of a weldable sheet material. Stiff foam polymer core articles, such as body boards, having detailed designs on them can be prepared by welding the multilayer sheet material to a foamed polymer core material.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 7, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Keith C. Andersen
  • Multilayer sheet material and articles formed therefrom
    Patent number: 5460871
    Abstract: A multilayer sheet material that is capable of being adhered to a foamed polymer core material is prepared from at least four layers, which are a first outer layer of a printable sheet material, an inner layer of a fibrous sheet material, an inner layer of an adhesive material, and a second outer layer of a weldable sheet material. Stiff foam polymer core articles, such as body boards, having detailed designs on them can be prepared by welding the multilayer sheet material to a foamed polymer core material.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: October 24, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Keith C. Andersen