Patents by Inventor Guenter Geismar

Guenter Geismar 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).

  • Process for regenerating wastepaper using a double layer hydroxide formed in situ
    Patent number: 5227020
    Abstract: In a process for processing waste paper, aqueous suspensions of pulp are treated with cationic layer compounds precipitated in situ. The separated printing inks, fillers and/or unwanted substances are then removed from the fibrous suspensions in a known manner by flotation or washing out.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: July 13, 1993
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Helmut Endres, Maria Liphard, Klaus Hornfeck, Andreas Arnold, Guenter Geismar