Patents by Inventor George Knuebel

George Knuebel 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).

  • Coupling components
    Patent number: 7211119
    Abstract: Keratin fibers are colored by an agent comprising a coupler which is a m-phenylenediamine derivative of the formula (I) wherein R1 is a C1–C4 alkyl group or a C1–C4 monohydroxyalkyl group; R2 is a methyl or an ethyl group; each of R3 and R4 is independently a branched or unbranched C2–C6 hydroxyalkyl group; and a cosmetically acceptable carrier. These couplers exhibit improved toxicological and dermatological properties and permit hair colorations in a broad color spectrum with good fastness properties.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: May 1, 2007
    Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
    Inventors: George Knuebel, Horst Hoeffkes, Ralph Nemitz
  • Novel coupling components
    Publication number: 20060000032
    Abstract: Keratin fibers are colored by an agent comprising a coupler which is a m-phenylenediamine derivative of the formula (I) wherein R1 is a C1-C4 alkyl group or a C1-C4 monohydroxyalkyl group; R2 is a methyl or an ethyl group; each of R3 and R4 is independently a branched or unbranched C2-C6 hydroxyalkyl group; and a cosmetically acceptable carrier. These couplers exhibit improved toxicological and dermatological properties and permit hair colorations in a broad color spectrum with good fastness properties.
    Type: Application
    Filed: June 23, 2005
    Publication date: January 5, 2006
    Inventors: George Knuebel, Horst Hoeffkes, Ralph Nemitz