Patents by Inventor Latchezara M. Gradinarova

Latchezara M. Gradinarova 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).

  • Regenerative bipolar fuel cell
    Patent number: 7014953
    Abstract: The present invention discloses a fuel cell, which incorporates a bipolar plate. The regenerative bipolar fuel cell of the present invention contains at least one hydrogen electrode in contact with a hydrogen stream and at least one oxygen electrode in contact with an oxygen stream. At least one electrolyte chamber is in contact with the hydrogen electrode and at least one electrolyte chamber is in contact with the oxygen electrode. The electrolyte chambers provide mechanical support within the fuel cell and provide an uninterrupted pathway for an electrolyte solution to contact the hydrogen electrode and the oxygen electrode, respectively. At least one bipolar plate is positioned between the hydrogen electrode and the oxygen electrode. The bipolar plate has a hydrogen side in contact with the hydrogen electrode and an oxygen side in contact with the oxygen electrode.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: March 21, 2006
    Assignee: Texaco Ovoric Fuel Cell, LLC
    Inventors: Zdravko Menjak, Srinivasan Venkatesan, Boyko Aladjov, Latchezara M. Gradinarova, Hong Wang, Standford R. Ovshinsky, Subhash K. Dhar
  • Fuel cell with overmolded electrode assemblies
    Patent number: 6989216
    Abstract: A fuel cell utilizing parallel flow of a hydrogen stream, an oxygen stream, and an electrolyte solution with respect to the electrodes, while maintaining mechanical support within the fuel cell. The fuel cell utilizes electrode assemblies having a frame overmolded around the electrode to maintain a flow rates and low pressure throughout the fuel cell. The fuel cell is also designed to maintain mechanical support within the fuel cell while the electrodes expand and contract in response to the absorption of oxygen and hydrogen.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: January 24, 2006
    Assignee: Texaco Ovonic Fuel Cell LLC
    Inventors: Rajeev Puttaiah, Zdravko Menjak, Latchezara M. Gradinarova, Srinivasan Venkatesan, Boyko Aladjov, Subhash Dhar, Stanford R. Ovshinsky
  • Fuel cell with overmolded electrode assemblies
    Publication number: 20030203273
    Abstract: A fuel cell utilizing parallel flow of a hydrogen stream, an oxygen stream, and an electrolyte solution with respect to the electrodes, while maintaining mechanical support within the fuel cell. The fuel cell utilizes electrode assemblies having a frame overmolded around the electrode to maintain a flow rates and low pressure throughout the fuel cell. The fuel cell is also designed to maintain mechanical support within the fuel cell while the electrodes expand and contract in response to the absorption of oxygen and hydrogen.
    Type: Application
    Filed: October 31, 2002
    Publication date: October 30, 2003
    Inventors: Rajeev Puttaiah, Zdravko Menjak, Latchezara M. Gradinarova, Srinivasan Venkatesan, Boyko Aladjov, Subhash Dhar, Stanford R. Ovshinsky
  • Regenerative bipolar fuel cell
    Publication number: 20030059664
    Abstract: The present invention discloses a fuel cell, which incorporates a bipolar plate. The regenerative bipolar fuel cell of the present invention contains at least one hydrogen electrode in contact with a hydrogen stream and at least one oxygen electrode in contact with an oxygen stream. At least one electrolyte chamber is in contact with the hydrogen electrode and at least one electrolyte chamber is in contact with the oxygen electrode. The electrolyte chambers provide mechanical support within the fuel cell and provide an uninterrupted pathway for an electrolyte solution to contact the hydrogen electrode and the oxygen electrode, respectively. At least one bipolar plate is positioned between the hydrogen electrode and the oxygen electrode. The bipolar plate has a hydrogen side in contact with the hydrogen electrode and an oxygen side in contact with the oxygen electrode.
    Type: Application
    Filed: October 22, 2002
    Publication date: March 27, 2003
    Inventors: Zdravko Menjak, Srinivasan Venkatesan, Boyko Aladjov, Latchezara M. Gradinarova, Hong Wang, Stanford R. Ovshinsky, Subhash K. Dhar