Patents by Inventor Jean-Jacques M. Vandenbossche

Jean-Jacques M. Vandenbossche 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).

  • Dyeing compositions for keratin fibres containing meta-phenylenediamines
    Patent number: 4330292
    Abstract: The invention resides in the use of the compounds having the formula given below, or an acid salt thereof, as couplers in dyeing compositions for keratin fibres which contain an oxidation base: ##STR1## in which formula n is equal to 2, 3 or 4 and R.sub.1 and R.sub.2 are identical or different and represent an alkyl group having from 1 to 4 carbon atoms.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: May 18, 1982
    Assignee: L'Oreal
    Inventors: Andree Bugaut, Jean-Jacques M. Vandenbossche, Majdi M. Shahin, Gregoire Kalopissis