Patents by Inventor Loert D. Meyer

Loert D. Meyer 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).

  • Electrolyte additive for a colorant bath for coloring aluminum and process for coloring aluminum
    Patent number: 5409592
    Abstract: The invention describes a novel electrolyte additive for a sulfuric acid tin(II) containing colorant bath for the alternating current coloring of anodized aluminum surfaces, consisting of a synergistic mixture of at least one antioxidant of one of the general formulas (I to IV) and at least one throwing power improver of general formula (V), and to a process for the alternating current coloration of anodized aluminum surfaces using the electrolyte additive of the invention.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: April 25, 1995
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Loert D. Meyer, Volker Sander, Juergen Lindener