Patents by Inventor Robert Roussel

Robert Roussel 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).

  • Process for preparing graft styrene copolymers
    Patent number: 4469847
    Abstract: A process for preparing graft styrene copolymers is effected by a two-stage polymerization of styrene in the presence of an EPDM elastomer and styrene block copolymer. The resultant graft styrene copolymer has a fine microstructure, good impact resistance and good resistance to aging.
    Type: Grant
    Filed: February 9, 1983
    Date of Patent: September 4, 1984
    Assignee: Societe Chimiques des Charbonnages
    Inventor: Robert Roussel
  • Process of preparation of graft copolymer of styrene and an EPDM rubber
    Patent number: 4412896
    Abstract: A process of preparation of a graft copolymer of (a) styrene and (b) an EPDM rubber by mass polymerization followed by irradiation, for example electron irradiation.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: November 1, 1983
    Assignee: Societe Chimique des Charbonnages
    Inventors: Maurice Lemattre, Robert Roussel, Rene Wirth