Patents by Inventor Dieter Oppen

Dieter Oppen 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 coating iron and steel
    Patent number: 4295899
    Abstract: A composition and process are useful for imparting a coating to an iron or steel surface which exhibits decorative and improved electrical and corrosion resistance properties. The composition contains an alkali silicate water-glass, an alkali polyphosphate and insoluble chromic oxide pigment. The composition is applied to the surface by conventional techniques and baked in place.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: October 20, 1981
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventor: Dieter Oppen
  • Chromium-free surface treatment
    Patent number: 4264378
    Abstract: A chromium-free process for phosphatizing a metal surface provides for applying to the surface an aqueous acidic solution having pH 1.5 to 3.0 and containing phosphate; a metal cation of valence two or greater; molybdate, tungstate, vanadate, niobate or tantalate ions; and drying the solution on the surface without rinsing.
    Type: Grant
    Filed: February 14, 1980
    Date of Patent: April 28, 1981
    Assignee: Oxy Metal Industries Corporation
    Inventors: Dieter Oppen, Karl Lampatzer