Patents by Inventor Richard Herman Woudenberg

Richard Herman Woudenberg 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).

  • Electro-optical device stable in the 600-1600 nanometer wavelength range
    Patent number: 5776375
    Abstract: The present invention provides an electro-optical device comprising NLO polymer in the active layer with improved stability for light in the wavelength range of 600-1600 nm is guided through the device. The present invention is directed to an electro-optical device comprising two cladding layers and an active layer sandwiched between these cladding layers, with the active layer comprising a non-linear optically active side chain polymer with NLO-chromophores having an N-donor-delocated .pi. system-acceptor structure, the N-donor not being bonded directly to alkyl groups. There are two ways to create NLO-chromophores with N-donors which do not have adjacent linear alkyl groups: The first way is to bond one or two aromatic groups. The N-atom is further bonded to the delocated .pi. system. If only one aromatic group is present, the N-atom is, besides the delocated system, further bonded to a hydrogen or deuterium atom.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: July 7, 1998
    Assignee: Akzo Nobel N.V.
    Inventors: Johannes Willem Hofstraat, Marinus Cornelis Flipse, Richard Herman Woudenberg