Patents by Inventor Johannes A. E. H. Van Haare

Johannes A. E. H. Van Haare 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).

  • Conjugated polymer in an oxidized state
    Patent number: 5994496
    Abstract: A conjugated polymer in an oxidized state has a doping level of 0.4 or higher. In said oxidized state the polymer is electroconductive, transparent to visible light and preferably colorless. A method of preparing such a polymer comprises the step of bringing the polymer into contact with a strong oxidative agent such as thianthrenium perchlorate. Layers of such polymers may be used as a transparent coating on a display device or as an electrode layer in an electroluminescent device.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: November 30, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Johannes A. E. H. Van Haare, Rene A. J. Janssen, Dagobert M. De Leeuw