Patents by Inventor Stefan Ferero-Lenger

Stefan Ferero-Lenger 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).

  • DPP-containing conjugated polymers and electroluminescent devices
    Patent number: 6451459
    Abstract: Diketopyrrolopyrrole (DPP) based polymers and copolymers comprising the following units wherein x is chosen in the range of from 0.005 to 1, and y from 0.995 to 0, and wherein x+y=1, and wherein Ar1 and Ar2 independently from each other stand for blends of such polymers and copolymers with other polymers, their use for the preparation of electroluminescent (“EL”) devices and EL devices comprising such polymers or copolymers.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: September 17, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Bernd Tieke, Thomas Beyerlein, Wolfgang Brütting, Stefan Ferero-Lenger