Patents by Inventor Lucienne Ravaine

Lucienne Ravaine 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).

  • Compositions based on derivatives of silica modified by organic groups, preparation and application thereof, particularly as cationic conductors
    Patent number: 4923950
    Abstract: Composition based on derivatives of silica modified by organic groups, characterized in that said derivatives are amorphous solids having formula (I) SiO.sub.2-0.5(x+y) (Z.sup.1.sub.x (Z.sup.2).sub.y .multidot.(XA).sub.z, wherein Z.sup.1 is a group having formula (II), R.sup.1 being an alkylene having from 3 to 8 carbon atoms optionally interrupted by a heteroatomic group --NH--, R.sup.3 and R.sup.4 representing each --H or representing together a group --CH.dbd.CH--N.dbd.CH--, Z.sup.2 is a group --R.sup.2 --SO.sub.3 H, R.sup.2 being an alkylene having from 3 to 8 carbon atoms optionally interrupted by a heteroatomic group --NH--; XZ is an acid (case where X.dbd.H) or a salt (case where X.dbd.metal) soluble in water x is a number different from 0 and lower or equal to 1; z is a number which may vary from 0 to 0.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: May 8, 1990
    Assignee: Centre National de la Recherche Scientifique (CNRS)
    Inventors: Lucienne Ravaine, Michel B. Armand, Yves Charbouillot, Abdelkader Hammou