Patents by Inventor Jean C. Roustant

Jean C. Roustant 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).

  • Propylene compositions with improved impact strength
    Patent number: 4774292
    Abstract: The invention concerns polypropylene compositions with improved impact strength adapted for conversion to finished articles by extrusion drawing, extrusion blow-molding or thermoforming characterized in that they contain:(a) 40 to 98% by weight of isotactic polypropylene(b) 2 to 60% by weight of a copolymer of linear low density polyethylene type with a density of up to 0.935, obtained by copolymerizing a mixture of ethylene and one or more upper alpha-olefins, by a copolymerizing process at a pressure below 4.10.sup.6 Pa, in the absence of any liquid hydrocarbons.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: September 27, 1988
    Assignee: BP Chemical Limited, plc.
    Inventors: Jean P. Thiersault, Jean C. Roustant, Alain Senez