Patents by Inventor Alexander A. Leef

Alexander A. Leef 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).

  • Battery cathode
    Patent number: 7682730
    Abstract: A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: March 23, 2010
    Assignee: The Gillette Company
    Inventors: Terry Copeland, Stuart M. Davis, Tae-Won Lee, Alexander A. Leef, Gary A. Miller, Shuming Zeng
  • Battery cathode
    Publication number: 20060159992
    Abstract: A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.
    Type: Application
    Filed: March 14, 2006
    Publication date: July 20, 2006
    Inventors: Terry Copeland, Stuart Davis, Tae-Won Lee, Alexander Leef, Gary Miller, Shuming Zeng
  • Battery cathode
    Patent number: 7045247
    Abstract: A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: May 16, 2006
    Assignee: The Gillette Company
    Inventors: Terry Copeland, Stuart M. Davis, Tae-Won Lee, Alexander A. Leef, Gary A. Miller, Shuming Zeng
  • Battery cathode
    Patent number: 6143446
    Abstract: A cathode that includes manganese dioxide and a titanium oxy salt, preferably titanium oxy sulfate, is disclosed.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: November 7, 2000
    Assignee: Duracell Inc.
    Inventors: Stuart M. Davis, Alexander A. Leef, Sandrine Colson, Hana Strunc
  • Additives for alkaline electrochemical cells having manganese dioxide cathodes
    Patent number: 5532085
    Abstract: The invention relates to alkaline cells containing manganese dioxide cathode active material. A substance selected from the group of compounds CaWO.sub.4, MgTiO.sub.3, BaTiO.sub.3, CaTiO.sub.3, ZnMn.sub.2 O.sub.4, and Bi.sub.12 TiO.sub.20 is added to the cathode of conventional alkaline cells typically having an anode comprising zinc and cathode comprising manganese dioxide and an alkaline electrolyte. The additive increases the service life of the cell.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: July 2, 1996
    Assignee: Duracell Inc.
    Inventors: Stuart M. Davis, Christopher P. Haines, Alexander A. Leef, Peter R. Moses