Patents by Inventor Roger E. Larson

Roger E. Larson 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).

  • Apparatus for making building panels in a continuous operation
    Patent number: 4606715
    Abstract: Apparatus for making building panels includes means for positioning upper and lower rigid sheets of material, such as paper pulp, in spaced relation so that foamable material disposed between the sheets can move into gripping engagement with both sheets as it expands and solidifies.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: August 19, 1986
    Inventor: Roger E. Larson
  • Foam building panels
    Patent number: 4602466
    Abstract: A method and apparatus for making building panels includes means for positioning upper and lower rigid sheets of material, such as paper pulp, in spaced relation so that foamable material disposed between the sheets can move into gripping engagement with both sheets as it expands and solidifies.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: July 29, 1986
    Inventor: Roger E. Larson
  • Method of making foam core building panels in a continuous operation
    Patent number: 4581186
    Abstract: A method and apparatus for making building panels includes means for positioning upper and lower rigid sheets of material, such as paper pulp, in spaced relation so that foamable material disposed between the sheets can move into gripping engagement with both sheets as it expands and solidifies.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: April 8, 1986
    Inventor: Roger E. Larson