Patents by Inventor Lâürent Frouin

Lâürent Frouin 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).

  • Patent number: 6761867
    Abstract: The invention relates to an aqueous suspension of precipitated silica, characterized in that its solids content is between 10 and 40% by weight, its viscosity is lower than 4×10−2 Pa.s at a shear rate of 50 s−1 and the quantity of silica present in the supernatant obtained after centrifuging the said suspension at 7500 revolutions per minute for 30 minutes represents more than 50% of the weight of the silica present in the suspension. The particle size distribution of the agglomerates in suspension is such that their median diameter D50 is smaller than 5 &mgr;m and the deagglomeration factor FD is greater than 3 ml. This suspension can be employed for the production of anticorrosion coatings and for the preparation of concretes, of paper or of inorganic adhesives.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: July 13, 2004
    Assignee: Rhone-Poulenc Chimie
    Inventors: Evelyne Prat, Lâürent Frouin