Patents by Inventor Birgit Gies

Birgit Gies 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).

  • Process for the collective pretreatment of steel, galvanized steel, magnesium and aluminum before bonding to rubber
    Patent number: 6440231
    Abstract: A process for the production of a rubber-to-metal bond on steel, galvanized steel, aluminum and/or magnesium is provided The process comprises at least the following steps: a) chemical pretreatment of the metal parts, b) intermediate rinsing, and c) vulcanizing-on of natural or synthetic rubber using primers and/or binders. The chemical pretreatment in step a) is carried out with an aqueous solution with a pH value of 3.5 to 5.5 which contains: 4 to 20 g/l of phosphate ions, 0.1 to 1 g/l of free or complexed fluoride, and 0.04 to 1 g/l of nitrate ions.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: August 27, 2002
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Wolf-Dieter Beiersdorf, Werner Gruber, Hans Scheer, Juergen Foell, Birgit Gies, Peter Kuhm, Franz-Josef Schueller