Patents by Inventor Lenard F. Silvester

Lenard F. Silvester 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).

  • Electrolyte additives to improve voltage regulation in the lithium-copper chloride rechargeable cell
    Patent number: 4902588
    Abstract: An electrochemical cell and method for improving voltage regulation of said cell. The cell employs lithium as an anode, lithium tetrachloroaluminate as an electrolyte, sulfur dioxide as a solvent, and high surface area carbon black containing cupric chloride as a cathode. Oxidizing agents such as halides and oxyhalides are employed to improve voltage regulation.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: February 20, 1990
    Assignee: Altus Corporation
    Inventors: On-Kok Chang, John C. Hall, Jeffrey Phillips, Lenard F. Silvester
  • Positive current collector for lithium secondary system
    Patent number: 4892796
    Abstract: A rechargeable non-aqueous electrochemical cell. The cell has a positive terminal, a negative terminal, a cathode collector attached to the positive terminal and an anode of alkaline metal connected to the negative terminal. The cell further possesses a non-aqueous electrolyte solution in contact with the cathode and anode. The cathode collector is composed of a chrome foil plated upon a core of nickel.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: January 9, 1990
    Assignee: Altus Corporation
    Inventors: On-Kok Chang, John C. Hall, Jeffrey Phillips, Lenard F. Silvester
  • Overdischarge protection for rechargeable cells
    Patent number: 4873158
    Abstract: A rechargeable electrochemical cell which resists venting in an over-discharge condition. A first microporous membrane is provided as a separator between the cell's anode and cathode, which allows for the passage of cell electrolyte, but inhibits the passage of metal dendrites. A tab extends from the anode to the cell casing and between the tab and inner wall of the cell casing is provided a second microporous membrane characterized as being less resistant to the passage of alkaline metal dendrites than the first microporous membrane.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: October 10, 1989
    Assignee: Altus Corporation
    Inventors: On-Kok Chang, John C. Hall, Jeffrey Phillips, Lenard F. Silvester
  • Additive to improve voltage regulation in a lithium-copper chloride rechargeable cell
    Patent number: 4844993
    Abstract: An electrochemical cell and method for improving voltage regulation of said cell. The cell employs lithium as an anode, lithium tetrachloroaluminate as an electrolyte, sulfur dioxide as a solvent, and high surface area carbon black containing cupric chloride as a cathode. A lithium halide, such as LiCl or LiBr, is employed to improve voltage regulation.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: July 4, 1989
    Assignee: Altus Corporation
    Inventors: On-Kok Chang, John C. Hall, Jeffrey Phillips, Lenard F. Silvester
  • Method of optimizing performance of Rankine cycle power plants
    Patent number: 4358930
    Abstract: A method for efficiently operating a Rankine cycle power plant (10) to maximize fuel utilization efficiency or energy conversion efficiency or minimize costs by selecting a turbine (22) fluid inlet state which is substantially in the area adjacent and including the transposed critical temperature line (46).
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: November 16, 1982
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: William L. Pope, Howard S. Pines, Padraic A. Doyle, Lenard F. Silvester