Patents Examined by Eisa Elihilo
  • Oxidation dyeing compositions containing a cationic coupling agent, novel cationic coupling agents
    Patent number: 6419711
    Abstract: The invention concerns an oxidation dyeing composition for keratinous fibers containing at least a monobenzene coupling agent including at least a cationic group Z bearing at least a cyclized or non-cyclized quaternary ammonium unit, the use of said coupling agents for dyeing keratinous fibers, dyeing methods using same, and novel monobenzene coupling agents comprising at least a cationic group Z bearing at least a cyclized or non-cylized quaternary ammonium.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: July 16, 2002
    Assignee: L'Oreal
    Inventors: Alain Genet, Alain Lagrange