Patents by Inventor Stephan Lüdtke

Stephan Lüdtke 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).

  • Pigment preparation, method for producing the same and its use
    Patent number: 8328930
    Abstract: Pigment preparation containing at least one pigment and at least one compound of the general formula CH3—(CH2)n—CH2—O—[(CH2)p—O]m—H. The pigment preparation can be produced by dispersing and drying. It can be used for coloration and/or antistaticization in waterborne color and varnish systems, emulsion paints, printing inks, liquid-ink systems and coating systems.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: December 11, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Gerd Tauber, Stephan Lüdtke, Ralph McIntosh, Werner Kalbitz, Jutta Zimmermann, Alfons Karl, Stephanie Frahn
  • PIGMENT PREPARATION, METHOD FOR PRODUCING THE SAME AND ITS USE
    Publication number: 20100180794
    Abstract: Pigment preparation containing at least one pigment and at least one compound of the general formula CH3—(CH2)n—CH2—O—[(CH2)p—O]m—H. The pigment preparation can be produced by dispersing and drying. It can be used for coloration and/or antistaticization in waterborne colour and varnish systems, emulsion paints, printing inks, liquid-ink systems and coating systems.
    Type: Application
    Filed: May 20, 2008
    Publication date: July 22, 2010
    Inventors: Gerd Tauber, Stephan Lüdtke, Ralph McIntosh, Werner Kalbitz, Jutta Zimmermann, Alfons Karl, Stephanie Frahn
  • Ink Jet Ink
    Publication number: 20090305011
    Abstract: Ink jet inks comprising a modified pigment, wherein the modified pigment is a pigment having attached organic groups of substituted or unsubstituted 1,2-benzenedicarboxylic acids and/or salts thereof.
    Type: Application
    Filed: May 30, 2009
    Publication date: December 10, 2009
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Ralph McIntosh, Gerd Tauber, Werner Kalbitz, Stephan Lüdtke, Jutta Zimmermann, Alfons Karl, Frank Forster
  • Aqueous, colloidal gas black suspension
    Patent number: 7160377
    Abstract: Aqueous, colloidal gas black suspension containing: (a) a gas black, (b) an azo compound of the formula 1 (c) and water. The aqueous, colloidal gas black suspension is produced by dispersing the gas black and the azo compound of the formula 1 in water. It can be used in the production of inks, ink-jet inks, surface coatings and colored printing inks.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: January 9, 2007
    Assignee: Degussa AG
    Inventors: Heinz Zoch, Werner Kalbitz, Stephan Lüdtke, Thomas Lüthge, Ralph McIntosh, Gerd Tauber
  • Aqueous, colloidal gas black suspension
    Patent number: 7005004
    Abstract: Aqueous, colloidal gas black suspension, containing a gas black, an azo compound of formula 1, and water. The aqueous, colloidal gas black suspensions is produced in that the gas black and the azo compound of general formula 1 are dispersed in water. It may be used to produce inks, ink jet inks, paints, printing inks, latices, textiles, leather, adhesives, silicones, plastics materials, concrete and construction materials.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: February 28, 2006
    Assignee: Degussa AG
    Inventors: Werner Kalbitz, Gerd Tauber, Heinz Zoch, Stephan Lüdtke, Thomas Lüthge, Ralph Mcintosh
  • Process for the production of modified carbon black
    Patent number: 6780389
    Abstract: A process for the production of modified carbon black, in which a carbon black dispersion containing carbon black, water and wetting agent, is mixed with an acid, aqueous solution or suspension of a primary amine and then reacted with sodium nitrite solution.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: August 24, 2004
    Assignee: Degussa AG
    Inventors: Alfons Karl, Ralph McIntosh, Werner Kalbitz, Horst Kleinhenz, Gerd Tauber, Stephan Luedtke
  • Process for the production of modified carbon black
    Publication number: 20040018140
    Abstract: A process for the production of modified carbon black, in which a carbon black dispersion containing carbon black, water and wetting agent, is mixed with an acid, aqueous solution or suspension of a primary amine and then reacted with sodium nitrite solution.
    Type: Application
    Filed: July 25, 2002
    Publication date: January 29, 2004
    Applicant: DEGUSSA AG
    Inventors: Alfons Karl, Ralph McIntosh, Werner Kalbitz, Horst Kleinhenz, Gerg Tauber, Stephan Luedtke