Patents by Inventor Dirk J. Zwanenburg

Dirk J. Zwanenburg 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).

  • Dye-containing layer of a film-forming polymeric binder and the use thereof in an information recording element
    Patent number: 4364986
    Abstract: Dye-containing layer of a film-forming polymeric binder and the application thereof in an information recording element.The invention relates to a dye-containing layer in which dye, if desired in a very large weight percentage is dissolved or finely divided in a copolymer (1:1) of methyl vinyl ether and maleic anhydride or a semi-ester thereof.The dye-containing layer is particularly suitable for use as a recording layer in an optical information recording element.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: December 21, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Dirk J. Zwanenburg, Wilhelmus P. M. Nijssen, Caspert G. I. van der Staak
  • Luminescent material dispersion
    Patent number: 4142987
    Abstract: A proper adherance of the luminescent material particles to the surface of the photoconductor is obtained when vinyl pyridinealkyl methacrylates polymers of 1-6, 6-14 and 14-20 carbon atoms are used as non-ionic macromolecular compounds.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: March 6, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Dirk J. Zwanenburg, Hans-Georg Junginger