Patents by Inventor Robert O. Johnson

Robert O. 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).

  • Impact modified polyetherimide-polycarbonate blends
    Patent number: 4673708
    Abstract: Ternary polymer blends contain (a) a polyetherimide, (b) a polycarbonate and (c) a minor amount of an acrylic rubber interpolymer composite. These blends are characterized by high impact strengths and advantageous processing temperatures.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: June 16, 1987
    Assignee: General Electric Company
    Inventors: John A. Rock, Norman E. Durfee, Jr., Robert O. Johnson
  • Polyetherimide bearing compositions
    Patent number: 4532054
    Abstract: Nonmetallic bearing compositions contain a polyetherimide resin and, as modifiers and reinforcements, a fluoropolymer, such as polytetrafluoroethylene, a lubricating agent selected from the group consisting of molybdenum disulfide, graphite or a silicone fluid, molybdenum disulfide-containing lubricant or any mixture thereof, and a reinforcing agent selected from the group consisting of glass fibers, carbon fibers and glass beads. The present compositions can be fabricated into a variety of shapes by injection molding, and have excellent wear resistance, load-bearing capabilities, and low coefficients of friction without the use of external lubrication.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: July 30, 1985
    Assignee: General Electric Company
    Inventor: Robert O. Johnson
  • Fishing tool
    Patent number: D296459
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: June 28, 1988
    Inventor: Robert O. Johnson
  • Fishing leader dispenser
    Patent number: D302210
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: July 18, 1989
    Inventor: Robert O. Johnson