Patents by Inventor Mark K. Gregory

Mark K. Gregory 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).

  • Acid seal
    Patent number: 7070441
    Abstract: A battery terminal includes an undercut groove that provides a leak proof seal between a battery terminal and a plastic battery cover or housing. The leak proof seal prevents electrolyte from seeping from the interior of the housing as well as prevents electrolyte from seeping between the battery terminal and plastic housing when the battery housing is filled with electrolyte.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: July 4, 2006
    Assignee: Tulip Corporation
    Inventors: Mark K. Gregory, Bernard N. Spiegelberg, Terry J. Evraets