Patents by Inventor Frank F. Liska

Frank F. Liska 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).

  • Patent number: 5067536
    Abstract: High quality agglomerated structural boards, lumber and other structural members such as I, U, T, L beams or corrugated plates or moldings are produced from engineered long, thin narrow green wood strands. Process, in which the parallel alignment of the strands to each other and their original starting orientation are maintained through their transportation, drying, blending, forming and pressing, preventing their intermingling, twisting, warping and breaking. The application of fungicides, pesticides, fire retarding and other chemicals during the blending process, impregnates or colors the agglomerated structural products throughout their cross section, making the products resistant against rot, insects, fire or aesthetically attractive for architectural applications.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: November 26, 1991
    Inventors: Frank T. Liska, Frank F. Liska
  • Patent number: 4681146
    Abstract: Square or rectangular clean cut flakes, wafers or strands of a uniform thickness, width and length, with edges extending at right, acute or obtuse angles to the surfaces are produced by an apparatus in four distinct operations, comprising the veneer slicing, cutting of the veneer sheets into veneer strips, chemical or laser beam treatment and flake cutting. The chemical or laser beam treatment is applied to the edges of the veneer strips which run transversally to the direction of wood fiber and the application takes place before the veneer strips are cut into flakes.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: July 21, 1987
    Inventors: Frank F. Liska, Frank T. Liska