Patents by Inventor Dung Duonghong

Dung Duonghong 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).

  • Process for the sensitization of an oxidation/reduction photocatalyst, and photocatalyst thus obtained
    Patent number: 4684537
    Abstract: A photocatalyst for photodecomposition of liquids is sensitized to visible light by chemically bonding to the catalyst a complex of a transition metal with a bipyridyl or phenanthrolyl type ligand.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: August 4, 1987
    Assignee: R. E. Stiftung
    Inventors: Michael Graetzel, Nick Serpone, Dung Duonghong
  • Product intended to be used as a photocatalyst, method for the preparation of such product and utilization of such product
    Patent number: 4427749
    Abstract: The product is in the form of discrete particles or in the form of a layer comprising an electrode. It consists of a semi-conductor material subject to photo-corrosion, for example, cadmium sulphide. In order to prevent such photo-corrosion, the surface of the semi-conductor material, which is intended to be illuminated, is covered with a transparent layer of RuO.sub.2, IrO.sub.2 or a mixture of RuO.sub.2 and IrO.sub.2.The product may be used for the conversion of solar energy into electric energy or into a fuel such as hydrogen.
    Type: Grant
    Filed: January 27, 1982
    Date of Patent: January 24, 1984
    Assignee: Michael Graetzel
    Inventors: Michael Graetzel, Kuppuswamy Kalyanasundaram, Dung Duonghong, Michael Neumann-Spallart, Enrico Borgarello