Patents by Inventor Alan Lagrange

Alan Lagrange 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).

  • Use of cationic phenyl-azo-benzene compounds for dyeing keratin fibers, dye compositions and dyeing processes
    Patent number: 6458167
    Abstract: The invention relates to dyeing compositions containing phenyl-azo-benzene compounds comprising at least one cationic group Z, Z being chosen from quaternized aliphatic chains, aliphatic chains comprising at least one quaternized saturated ring and aliphatic chains comprising at least one quaternized unsaturated ring, to the use of such compositions as direct dyes in dyeing applications for keratin substances, in particular human keratin fibers and especially the hair, and to the direct dyeing processes employing these compositions.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: October 1, 2002
    Assignee: L'Oreal S.A.
    Inventors: Alain Genet, Alan Lagrange
  • Cationic monobenzenic dyes, their use for the oxidation-dyeing of keratin fibers, dye compositions and dyeing processes
    Patent number: 6383230
    Abstract: The invention relates to novel monobenzenic dyes including at least one cationic group Z, Z chosen from quaternized aliphatic chains, aliphatic chains including at least one quaternized saturated ring and aliphatic chains including at least one quaternized unsaturated ring, to their use as oxidation-dye precursors for the oxidation-dyeing of keratin fibers, to dye compositions containing them and to oxidation-dyeing processes using them.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: May 7, 2002
    Assignee: L'Oreal
    Inventors: Alain Genet, Alan Lagrange