Patents by Inventor J{umlaut over (u)}rgen Leimann

J{umlaut over (u)}rgen Leimann 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).

  • Aqueous carbon black dispersions
    Patent number: 6171382
    Abstract: Aqueous carbon black dispersions contain carbon black and surfactants, in addition to water. The dispersions are produced by dispersing the carbon black and the other constituents in water, using bead mills, ultrasonic mills and/or an ultra-turrax. The aqueous carbon black dispersions can be used to produce printing inks such as ink-jet inks or writing inks.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: January 9, 2001
    Assignee: Degussa-Huls AG
    Inventors: Andreas St{umlaut over (u)}bbe, Horst Kleinhenz, J{umlaut over (u)}rgen Leimann, Alfons Karl