Patents by Inventor Tarek Sarraf

Tarek Sarraf 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).

  • Composition comprising a vinylaromatic polymer and a rubber and process for obtaining it
    Patent number: 5708081
    Abstract: The invention relates to polymer compositions of high impact strength, comprising a vinylaromatic polymer and a rubber, and to a process for their manufacture.These compositions are obtained by virtue of the use of two polybutadienes whose viscosities, measured at 25.degree. C. at a concentration of 5% in styrene, are, respectively, between 120 and 350 centipoises in the case of one and between 30 and 90 centipoises in the case of the other.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: January 13, 1998
    Assignee: Elf Atochem S. A.
    Inventors: Tarek Sarraf, Thomas Edward Jenkins
  • Elastomer-coated mineral particles
    Patent number: 5696183
    Abstract: Disclosed are elastomer-coated mineral particles which are characterized by being in the form of individual granules. The disclosure also relates to a process for preparing the said particles, the said process being characterized in that it consists of the following: a) Causing the mineral particles to react with at least one binding agent which includes at least one polyoxyethylenic sequence, and with at least one elastomer latex; b) Separation of the liquid phase from the particles; c) Drying of the said particles. The utilization of the said particles for the reinforcement of thermoplastic polymers and thermoplastic polymers reinforced with the mineral particles according to this invention are likewise disclosed.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: December 9, 1997
    Assignee: Elf Atochem S. A.
    Inventors: Tarek Sarraf, Frederic Hoehn, Gerard Riess