Patents by Inventor Roy L. Johnston

Roy L. Johnston 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).

  • Blend of polyethylene terephthalate matrix and thermotropic liquid crystal block copolymer
    Patent number: 5346970
    Abstract: Blends of a poly(ethylene terephthalate) matrix and a thermotropic liquid crystalline segmented block copolymer comprising rod (e.g., aromatic ester mesogen units containing flexible alkylene spacers) and flexible coil polymer blocks of poly(butylene terephthalate) can be used as molding compositions or in the formation of fibers and films.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: September 13, 1994
    Assignee: Akzo Nobel nv
    Inventors: Sophia Dashevsky, Ki-Soo Kim, Stanley W. Palmaka, Roy L. Johnston, Leonardus A. G. Busscher, Johannes A. Juijn