Patents by Inventor Rolf-Werner Haubold

Rolf-Werner Haubold 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).

  • Method for coloring hair
    Patent number: 6916343
    Abstract: A method for coloring keratin fibers is provided that includes at least two steps. In one step, the keratin fibers are treated with a pretreatment composition containing at least one substantive dye. In another step, the keratin fibers are treated with a composition containing at least one synthetic dye or synthetic dye precursor after applying the pretreatment composition.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: July 12, 2005
    Assignee: Hans Schwarzkopf GmbH & Co. KG
    Inventors: Mustafa Akram, Rolf-Werner Haubold