Patents by Inventor Hans-Jürgen Sander

Hans-Jürgen Sander 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 the stabilization of a stabilizer mixtures for recycled plastic mixtures
    Patent number: 6525158
    Abstract: Recycled mixtures of plastics, predominantly thermoplastics, as predominantly produced in the household, in commerce and also in industry and useful material collections, can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and an inorganic compound from the series consisting of metal oxides, hydroxides and carbonates.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: February 25, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Kurt Hoffmann, Heinz Herbst, Rudolf Pfaendner, Hans-Jürgen Sander, Franciszek Sitek