Patents by Inventor Steven E. Hathaway

Steven E. Hathaway 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 charger and charge control system
    Patent number: 6518726
    Abstract: A battery charger and charge control system charges series connected lithium-ion batteries to a voltage in the range of about 4.1 volts and about 4.3 volts per battery with a voltage input to the system in the range of about 4.1 to about 4.5 volts per battery. Switching efficiencies associated with the system allow the charging and charge control circuitry of the system to be positioned within the battery housing. The charging and charge control circuitry may mount onto a single circuit board. Morever, the battery charger and charge control system allows the lithium-ion batteries to simultaneously charge and discharge.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: February 11, 2003
    Assignee: Eagle-Picher Technologies, L.L.C.
    Inventors: Ronald D. Nowlin, Jr., Heath Throneberry, Donnie M. McCorkle, Steven E. Hathaway