Patents by Inventor Roger W. Johnson

Roger W. Johnson 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: 5403426
    Abstract: A method for preparing hydrophobic fiber for processing, inclusive of crimping, cutting, carding, compiling and bonding, without substantial loss in hydrophobic properties in the finished staple or corresponding nonwoven product through initial application of a surface modifier component comprising one or more of a class of water soluble compounds substantially free of lipophilic end groups and of low or limited surfactant properties.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: April 4, 1995
    Assignee: Hercules Incorporated
    Inventors: Roger W. Johnson, Thomas W. Theyson
  • Patent number: 5118562
    Abstract: Constrained layer damping structures are often based on viscoelastic layers of iso-octyl acrylate:acrylic acid or analogous copolymers. As the acrylic acid content is increased, the peak damping temperature also increases; unfortunately, however, the copolymer becomes more brittle and susceptible to shock, especially at low temperatures. Incorporating small amounts of rubbery polymer particles (especially core-shell polymers) in the viscoelastic copolymer alleviates this problem.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: June 2, 1992
    Assignee: Minnesota Mining and Manufacturing Co.
    Inventors: Roger W. Johnson, William D. Sell, Charles D. Wright
  • Patent number: 4249382
    Abstract: An improved turbocharged engine system comprising a piston engine with an inlet manifold, an exhaust manifold, a turbine driven by exhaust gases for transporting a portion of the exhaust gas energy to drive a compressor between a gas intake and the inlet manifold. There is used as the exhaust manifold a first exhaust manifold receiving exhaust gases only from a first set of pistons and a second exhaust manifold receiving exhaust gases only from a second set of pistons. The turbine comprises a first turbine driven by first exhaust manifold exhaust gases. The compressor comprises a first compressor driven by the first turbine. A portion of the exhaust gases from the second exhaust manifold are recycled to the inlet manifold.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: February 10, 1981
    Assignee: Caterpillar Tractor Co.
    Inventors: Duane E. Evans, William L. Brown, Jr., Roger W. Johnson
  • Patent number: 3972644
    Abstract: A turbine having a radial inlet to the turbine wheel is provided with variable nozzle vanes to control the inlet flow to the turbine. The vanes are controlled by lever-actuated gearing to provide a positive coupling of input to the vanes.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: August 3, 1976
    Assignee: Caterpillar Tractor Co.
    Inventor: Roger W. Johnson