Patents by Inventor Rolf Dunker

Rolf Dunker 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 activating titanium surfaces for subsequent plating with metallic coatings
    Patent number: 4340620
    Abstract: A method for activating titanium surfaces for subsequent plating with metallic coatings comprising:(a) wet peening the titanium surface to be plated using fine-grain Al.sub.2 O.sub.3,(b) pickling the peened surface with a fluoridic solution at room temperature for several minutes, and(c) activating the surface with a solution containing chromium, fluorine, and arsenic or antimony at temperatures of 35.degree. to 100.degree. C. for fifteen to fifty minutes.The molar ratio of fluorine to arsenic or antimony is between six and seven, and the molar ratio of chromium to antimony or arsenic is between three and six.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: July 20, 1982
    Assignee: MTU Motoren-und Turbinen-Union
    Inventors: Gotz Mielsch, Rolf Dunker, Martin Thoma