Patents by Inventor Christian Herkt-Maetzky

Christian Herkt-Maetzky 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).

  • Polymeric materials which can be inscribed by laser light
    Patent number: 5053440
    Abstract: Molding compounds, semi-finished products and finished articles comprising polymeric material which can be inscribed by means of laser light. The products contain an additive which is virtually colorless in the visible spectral range and produces a marking with high color contrast in the visible spectral range under the effect of laser light outside the visible range.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: October 1, 1991
    Assignee: Huels Aktiengesellschaft
    Inventors: Ralf Schueler, Christian Herkt-Maetzky, Wilfried Bartz