Patents by Inventor MATTHIAS BRETTMANN

MATTHIAS BRETTMANN 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 PASSIVATING A METALLIC SURFACE
    Publication number: 20170037517
    Abstract: A method for passivating a metal surface of a light-weight metal part is disclosed, wherein a conversion layer is applied to the surface of the light-weight metal part in a passivation step. A passivation step is carried out wherein an aqueous passivation solution is used to create a calcium phosphate-containing conversion layer (5) on the metal surface of the part, said conversion layer comprising oxides and hydroxides from the material of the part and from the passivation solution and containing amino acids.
    Type: Application
    Filed: March 21, 2015
    Publication date: February 9, 2017
    Applicant: AUDI AG
    Inventors: MICHAEL GRABOWSKI, DANIEL BLÜCHER, MICHAEL KORTE, MATTHIAS BRETTMANN, SANNAKAISA VIRTANEN