Patents by Inventor Herbert Wievelhoff

Herbert Wievelhoff 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 simultaneous smoothing, cleaning, and surface protection of metal objects
    Patent number: 5047095
    Abstract: By using an aqueous solution containing a phosphoric acids or phosphate salts together with carboxylic acids containing at least two carboxyl groups per molecule along with conventional mass finishing, a wide variety of metal parts may be simultaneously deburred, cleaned, and provided with a surface with good resistance to corrosion in humid air. The solution used preferably also contains non-ionic surfactant, corrosion inhibitor, and, for use in hard water areas, a water hardness stabilizer.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: September 10, 1991
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Juergen Geke, Hermann Drosdziok, Herbert Wievelhoff