Patents by Inventor Thomas J. Hopper

Thomas J. Hopper 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).

  • Layered metal hydride electrode providing reduced cell pressure
    Patent number: 6503659
    Abstract: A layered hydrogen absorbing alloy electrode for an alkaline electrochemical cell. The layered electrode comprises a outer layer comprising a metal oxide, metal sulfide or mixtures thereof. The outer layer reduces the internal pressure of electrochemical cell.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: January 7, 2003
    Assignee: Ovonic Battery Company, Inc.
    Inventors: Stanford R. Ovshinsky, Srinivasan Venkatesan, Boyko Aladjov, Kevin Fok, Thomas J. Hopper, Lynn Taylor
  • Electrochemical cell having reduced cell pressure
    Patent number: 6492057
    Abstract: An alkaline electrochemical cell having a hydrogen absorbing alloy negative electrode. The electrochemical cell comprises an alkaline electrolyte comprising an additive material which reduces cell pressure by decreasing hydrogen gas evolution.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: December 10, 2002
    Assignee: Ovonic Battery Company, Inc.
    Inventors: Stanford R. Ovshinsky, Srinivasan Venkatesan, Boyko Alajov, Kevin Fok, Thomas J. Hopper, James L. Strebe
  • Active electrode compositions comprising Raney based catalysts and materials
    Patent number: 6218047
    Abstract: An active composition for the electrode of an alkaline electrochemical cell. The active composition comprises an active electrode material and an additive material selected from the group consisting of a Raney alloy, and a Raney catalyst. The active composition may be used to form metal hydride electrodes.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: April 17, 2001
    Assignee: Ovonic Battery Company, Inc.
    Inventors: Stanford R. Ovshinsky, Srinivasan Venkatesan, Boyko Alajov, Thomas J. Hopper, Kevin Fok