Patents by Inventor Brigitta Hurschmann

Brigitta Hurschmann 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).

  • Agent and process for dyeing and tinting keratinous fibres
    Patent number: 6364913
    Abstract: Formulations for coloring keratinous fibers are provided, comprising a substantive dye, an aminopolycarboxylic acid or salt thereof with a physiologically compatible cation, and isoascorbic acid or a salt thereof with a physiologically compatible cation. Also provided are methods of coloring keratinous fibers with the formulations.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: April 2, 2002
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Brigitta Hurschmann, Detlef Hollenberg