Patents by Inventor Michael G. Semmens

Michael G. Semmens 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).

  • Sealed recharge battery plenum stabilized with state changeable substance
    Patent number: 6074774
    Abstract: A lead-acid battery including a case, a plurality of negative and positive electrode plates arranged in the case, a plurality of separators interposed between the negative and positive electrode plates, and a plenum stabilization material disposed within the case to maintain the positions of the electrode plates relative to one another and to other components within the case. The plenum stabilization material includes a compound that (i) is solid during normal operation of the battery and (ii) can undergo reversible physical change in state from solid to liquid when the battery is subjected to or is operated under abnormal conditions.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: June 13, 2000
    Assignee: Electrosource, Inc.
    Inventors: Michael G. Semmens, Ajoy Datta, Fardad Forouzan