Patents by Inventor Wolfgang Grossmann

Wolfgang Grossmann 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).

  • Patent number: 5391341
    Abstract: For the manufacture of quickly drying dip coats whose drying time is comparable to the drying time of shells produced on the basis of alcoholic binders, the process uses as a binder for the dip a dispersion of aqueous colloidal silica sol to which synthetic high polymers and/or an emulsion from the group of silicon-organic compounds is formed which after drying is impermeable to water but permeable to water vapor.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: February 21, 1995
    Assignees: Heinrich Ballewski, Herbert Graf, Wolfgang Grossmann
    Inventors: Heinrich Ballewski, Herbert Graf, Wolfgang Grossmann
  • Patent number: 4766948
    Abstract: Improved small dendrite arm spacings and good technical values, regarding the technical properties of aluminum alloys, particularly tensile strength, yield strength and elongation percent, can be reliably obtained by refining the grain of the casting to provide the smallest possible spacings between the secondary dendrite arms, by casting the aluminum alloys in a ceramic mold provided with numerous micro-sized rough spots and pores and to the inner wall of which mold after it is dried and fired has been applied a thin layer of a salt mixture in which the cations are primarily from the alkalis and/or alkaline earths and the anions are primarily from halogens and which applied salt mixture has a liquidus temperature lower than the casting temperature of the alloy.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: August 30, 1988
    Assignee: Thyssen Industrie AG
    Inventors: Friedrich Behr, Heinrich Ballewski, Wolfgang Grossmann