Patents by Inventor Eva Wiedemann

Eva Wiedemann 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).

  • Zirconium phosphating of metal components, in particular iron
    Patent number: 8663443
    Abstract: The present invention relates to a method for the corrosion-protective pretreatment of metal components, which at least partially comprise metal surfaces made of iron, using a chromium-free aqueous treatment solution, which contains fluoro-complexes of zirconium and/or titanium and phosphate ions in a specific ratio range to one another, and a metal component which is pretreated accordingly, and the use thereof for the application of further corrosion-protective coatings and/or lacquer systems. The method is suitable in particular as a pretreatment for electrophoretic painting of metal components, which are provided in the form of non-closed hollow bodies.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: March 4, 2014
    Inventors: Maximilian Schoenherr, Jerzy-Tadeusz Wawrzyniak, Eva Wiedemann
  • ZIRCONIUM PHOSPHATING OF METAL COMPONENTS, IN PARTICULAR IRON
    Publication number: 20100293788
    Abstract: The present invention relates to a method for the corrosion-protective pretreatment of metal components, which at least partially comprise metal surfaces made of iron, using a chromium-free aqueous treatment solution, which contains fluoro-complexes of zirconium and/or titanium and phosphate ions in a specific ratio range to one another, and a metal component which is pretreated accordingly, and the use thereof for the application of further corrosion-protective coatings and/or lacquer systems. The method is suitable in particular as a pretreatment for electrophoretic painting of metal components, which are provided in the form of non-closed hollow bodies.
    Type: Application
    Filed: May 21, 2010
    Publication date: November 25, 2010
    Applicant: Henkel AG & Co. KGaA
    Inventors: Maximilian Schoenherr, Jerzy-Tadeusz Wawrzyniak, Eva Wiedemann