Patents by Inventor Jacob W De Vaal

Jacob W De Vaal 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).

  • Electrochemical fuel cell stack having a plurality of integrated voltage reversal protection diodes
    Patent number: 7235315
    Abstract: An electrochemical fuel cell stack comprises a plurality of fuel cell assemblies, wherein, each fuel cell assembly comprises a cell compressed between a pair of flow field plates, a perimeter seal circumscribing the cell and interposed between the pair of flow field plates, and a first diode, having an aspect ratio greater than 10:1, positioned adjacent to, and outside of, the perimeter seal along a first edge of the cell and interposed between the pair of flow field plates.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: June 26, 2007
    Assignee: Ballard Power Systems Inc.
    Inventors: Shanna D Knights, Jacob W De Vaal, Michael V Lauritzen, David P Wilkinson