Patents by Inventor Sylvain Juge

Sylvain Juge 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 preparation of derivatives of phosphinous acid and intermediate product used to that effect
    Patent number: 4952728
    Abstract: New chemical product, constituted by an organic phosphorus compound of the structure ##STR1## where Q is an N or O atom, T is an alkylene or arylene, possibly carrying substituents, or not existing, while R.sup.1 to R.sup.7, the same or different, are H or aliphatic, cycloaliphatic and/or arylic hydrocarbon radicals, possibly substituted, R.sup.3 not existing when Q is oxygen.This product is used as an intermediate in the preparation of different derivatives of phosphinous acid.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: August 28, 1990
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Sylvain Juge, Jean-Pierre Genet
  • Cyclic diphosphonites
    Patent number: 4694094
    Abstract: New organic compounds containing a phosphorus heterocycle of the phosphonite type, in which the phosphorus atom is connected on the one hand to an oxygen atom and on the other hand to an oxygen, sulphur or nitrogen atom, characterized by comprising two of such heterocycles, the two phosphorus atoms being connected by a hydrocarbon group. Preparation of these diphosphonites by the action of a tetrahalogeno- or tetraminodiphosphine upon a diol or an alcohol carrying a phenol, thiol, enol, acid or amine function.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: September 15, 1987
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Sylvain Juge, Yvonne Legras