Patents by Inventor Larry J. Laursen

Larry J. Laursen 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).

  • Method of making a polymeric optical waveguide by coextrusion
    Patent number: 4871487
    Abstract: A quadrangular optical waveguide is formed by the coextrusion of polymeric materials. The waveguide comprises a solid light conducting core which is encased in a cladding layer having a lower index of refraction. Taps may be formed in the waveguide by a heated probe to deflect light out of the waveguide.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: October 3, 1989
    Assignee: The Dow Chemical Company
    Inventors: Larry J. Laursen, Virgil W. Coomer, Walter J. Schrenk
  • Method of making a hollow light pipe
    Patent number: 4806289
    Abstract: A hollow light conductor with enhanced light-transmitting properties is formed by the coextrusion of polymeric materials. The hollow light conductor comprises a continuous annular core layer encased in inner and outer cladding layers.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: February 21, 1989
    Assignee: The Dow Chemical Company
    Inventors: Larry J. Laursen, Virgil W. Coomer, Walter J. Schrenk
  • Flanging of plastic lined conduit
    Patent number: 4520547
    Abstract: Plastic lined pipe with the lining adhered to the pipe is flanged such as by a hydraulic operation. Resultant flanged pipe does not require heat treatment.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: June 4, 1985
    Assignee: The Dow Chemical Company
    Inventors: Larry J. Laursen, Elton D. Prueter