Patents by Inventor Pulahinga Don Dayananda Rodrigo

Pulahinga Don Dayananda Rodrigo 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).

  • Fuel cell gas separator plate with paths of electrically conductive material of a silver-glass composite
    Patent number: 7648789
    Abstract: A fuel cell gas separator (212) for use between two solid oxide fuel cells (210) and having a separator body with an anode-facing side and a cathode-facing side and with paths (234) of electrically conductive material therethrough in an electrode-contacting zone (236). In a first aspect, the electrically conductive material comprises a silver-glass composite, preferably containing 15 to 30 wt % glass. In this aspect the material of the separator body is preferably zirconia and the silver is commercially pure, a silver mixture or a silver alloy. In another aspect, the material of the separator body is zirconia, the electrically conductive material comprises silver or a silver-based material, a coating of nickel is formed on the electrode-contacting zone (236) on the anode-facing side preferably with an undercoating of Ag, and a coating of Ag—Sn alloy is formed on the electrode-contacting zone (236) on the cathode side.
    Type: Grant
    Filed: July 13, 2002
    Date of Patent: January 19, 2010
    Assignee: Ceremic Fuel Cells Limited
    Inventors: Pulahinga Don Dayananda Rodrigo, Sathia K Aruliah, Sudath Amarasighe, Robert Randolph Hughan, Jeremy Carl Lawrence, Jarrod David Barker