Patents by Inventor James Liestra

James Liestra 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).

  • Manufacture of membrane electrode assembly with edge protection for PEM fuel cells
    Patent number: 8470497
    Abstract: Methods for attaching a subgasket to an ionomer membrane, wherein the methods provide for the precise location of the subgasket relative to the other component edges of the fuel cell, such as the catalyst layers, so as provide the functionality required to extend the ionomer membrane life and prevent damage to the ionomer membrane during the assembly process.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: June 25, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Ronald L. James, Seth D. Valentine, James Liestra