Patents by Inventor Philipp Stobel

Philipp Stobel 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).

  • Organic electroluminescent element
    Publication number: 20070051944
    Abstract: The present invention relates to the improvement of phosphorescent organic electro-luminescent devices by using materials of the formula (1), preferably triazines, pyrimidines, pyridazines and pyrazines, in the hole-blocking layer.
    Type: Application
    Filed: November 24, 2004
    Publication date: March 8, 2007
    Inventors: Horst Vestweber, Anja Gerhard, Philipp Stobel