Patents by Inventor Manfred Hirschmeier

Manfred Hirschmeier 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 chemically removing aluminum diffusion layers
    Patent number: 4619707
    Abstract: Aluminum diffusion layers are removed from work piece surfaces, especially compressor and turbine blades, by exposing the respective surface areas to an aqueous solution of nitrobenzenesulfonic acid preferably in combination with other components, such as sodium compounds. Depending on the thickness of the layer to be removed the exposure time is within the range of about 30 to 90 minutes at a temperature below about 50.degree. C.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: October 28, 1986
    Assignee: MTU Motoren-und Turbinen-Union Muenchen GmbH
    Inventors: Manfred Hirschmeier, Josef Kreitl