Patents by Inventor Klaus H. Ihmels

Klaus H. Ihmels 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).

  • Separator for sealed lead accumulators
    Patent number: 6124059
    Abstract: The invention relates to microporous battery separators based on an essentially homogeneous mixture of a thermoplastic polymer, an inert filler and optionally a plasticizer. The separators contain, as filler, pyrogenic silica in a quantity of more than 20 vol. % and optionally one or more further fillers, so that the filler content overall is more than 60 up to a maximum of 82 vol.-%. The separators are suitable in particular for the manufacture of sealed accumulators.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: September 26, 2000
    Assignee: Daramic, Inc.
    Inventors: Werner Bohnstedt, Jorg Deiters, Klaus H. Ihmels, Jurgen Ruhoff