Patents by Inventor Raymond T. E. Christie

Raymond T. E. Christie 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 double layer capacitor having carbon powder electrodes
    Patent number: 6804108
    Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: October 12, 2004
    Assignee: Maxwell Electronics, Inc.
    Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi
  • Electrochemical double layer capacitor having carbon powder electrodes
    Publication number: 20040085709
    Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.
    Type: Application
    Filed: July 28, 2003
    Publication date: May 6, 2004
    Applicant: Maxwell Electronics, Inc.
    Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi
  • Electrochemical double layer capacitor having carbon powder electrodes
    Patent number: 6627252
    Abstract: A double layer capacitor includes first and second electrode structures separated by a porous separator. The first and second electrode structures each include a current collector foil, a primary coating formed on the current collector foil, and a secondary coating formed on the primary coating. The primary coatings include conducting carbon powder, and the secondary coatings include activated carbon powder. A method of making the electrode structures includes the steps of: preparing a first slurry that includes conducting carbon powder and a binder; applying the first slurry to a current collector plate; drying the applied first slurry to form a primary coating; preparing a second slurry that includes activated carbon powder, a solvent and a binder; and applying the second slurry to the primary coating.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: September 30, 2003
    Assignee: Maxwell Electronic Components, Inc.
    Inventors: Chenniah Nanjundiah, Richard P. Braun, Raymond T. E. Christie, C. Joseph Farahmandi