Patents by Inventor Richard Harold Backderf

Richard Harold Backderf 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).

  • Layered composite of overpolymer rubbers as tougheners and thermoset and thermoplastic molding compositions
    Patent number: 4082895
    Abstract: Overpolymer rubbers comprised of a hard, predominantly acrylonitrile core, a rubbery shell, and a hard overcoat are prepared which have utility as tougheners for thermoset or thermoplastic resin molding compounds.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: April 4, 1978
    Assignee: The B. F. Goodrich Company
    Inventors: Richard Harold Backderf, Clifford Dale Guiley, Jr.
  • Latex modified portland cement and use thereof in polymerization reactors
    Patent number: 4049894
    Abstract: In the aqueous polymerization of vinyl chloride and vinylidene chloride polymers and copolymers, the polymer build up normally experienced in many areas of commercial polymerization reactors is reduced, or when such polymer build up does occur it is more readily removed, when these trouble areas in polymerization reactors are coated with a latex-modified portland cement composition, the polymer in said latex containing carboxyl groups and the polymer having a Tg .degree. C. of less than about 40.degree. C., preferably less than about 25.degree. C.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: September 20, 1977
    Assignee: The B. F. Goodrich Company
    Inventor: Richard Harold Backderf
  • Overpolymer rubbers as tougheners for thermoset and thermoplastic molding compounds and compositions thereof
    Patent number: 4026970
    Abstract: Overpolymer rubbers comprised of a hard, predominantly arcylonitrile core, a rubbery shell, and a hard overcoat are prepared which have utility as tougheners for thermoset or thermoplastic resin molding compounds.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: May 31, 1977
    Assignee: The B. F. Goodrich Company
    Inventors: Richard Harold Backderf, Clifford Dale Guiley, Jr.