Patents by Inventor Stephan Ludtke

Stephan Ludtke 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).

  • 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
  • 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
  • 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
  • Publication number: 20070031319
    Abstract: Carbon material having organic groups, obtainable by the reaction of carbon material with organic compounds of the general formula 1 The invention's carbon materials having organic groups are useful in dispersions, rubber, plastics, inks, including solventborne inks, waterborne inks, inkjet inks, xerographic toners, coatings, paints, bitumen, concrete or other building materials, paper or as a reducing agent in metallurgy.
    Type: Application
    Filed: August 2, 2006
    Publication date: February 8, 2007
    Applicant: Degussa AG
    Inventors: Thomas Luthge, Ralph McIntosh, Gerd Tauber, Werner Kalbitz, Stephan Ludtke, Egon Fanghanel, Gerd Schukat
  • 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
  • Publication number: 20060243165
    Abstract: The invention is directed to a suspension containing: (a) at least one water-insoluble colorant, (b) at least one heterocyclic compound of the general formula 1 and (c) water and/or a mono- or polyhydric alcohol. The aqueous suspension is produced when the water-insoluble colorant and the heterocyclic compound of the formula 1 are dispersed in water and/or a mono- or polyhydric alcohol. The suspension is useful for producing waterborne inks, ink jet inks, coatings and solventborne printing inks.
    Type: Application
    Filed: February 28, 2006
    Publication date: November 2, 2006
    Applicant: Degussa AG
    Inventors: Thomas Luthge, Gerd Tauber, Ralph McIntosh, Heinz Zoch, Werner Kalbitz, Jutta Zimmermann, Christian Sieblist, Stephan Ludtke
  • 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
  • Publication number: 20060011104
    Abstract: Aqueous, colloidal gas black suspension containing (a) a gas black, (b) an azo compound of the general formula 1. (C) and water. The aqueous, colloidal gas black suspension is produced by dispersing the gas black and the azo compound of the general formula 1 in water. It can be used in the production of inks, ink-jet inks, surface coatings and coloured printing inks.
    Type: Application
    Filed: November 5, 2003
    Publication date: January 19, 2006
    Inventors: Heinz Zoch, Werner Kalbitz, Stephan Ludtke, Thomas Luthge, Ralph McIntosh, Gerd Tauber
  • Publication number: 20050178291
    Abstract: Aqueous, colloidal gas black suspension aqueous, colloidal gas black suspensions, containing a gas black, an azo compound of formula 1, and water. The aqueous, colloidal gas black suspensions are produced by dispersing the gas black and the azo compound of formula 1 in water. The aqueous, colloidal gas black suspension can be used to produce inks, ink jet inks, paints, printing inks, latices, textiles, leather, adhesives, silicones, plastics materials, concrete and construction materials.
    Type: Application
    Filed: March 30, 2004
    Publication date: August 18, 2005
    Inventors: Werner Kalbitz, Gerd Tauber, Heinz Zoch, Stephan Ludtke, Thomas Luthge, Ralph Mcintosh
  • Publication number: 20040087707
    Abstract: Aqueous, colloidal, freeze-resistant and storage-stable gas black suspension are disclosed containing 2-30 wt. % gas black, 0-40 wt. % carbon black, a dispersion-supporting additive, a biocide and water and having a zeta potential of less than −10 mV, a surface tension of greater than 50 mN/m and an average particle size of less than 200 nm. The aqueous, colloidal, freeze-resistant and storage-stable gas black suspension is produced by dispersing the gas black and the carbon black in water together with the dispersion-supporting additive and biocide. Inks, ink-jet inks, lacquers and printing inks can be made from these suspensions.
    Type: Application
    Filed: July 25, 2003
    Publication date: May 6, 2004
    Inventors: Heinz Zoch, Werner Kalbitz, Stephan Ludtke, Thomas Luthge, Gerd Tauber
  • Publication number: 20030041777
    Abstract: The inkjet ink contains at least one pigment and at least one compound having a mean particle size of greater than 50 nm from the group comprising pyrogenic silicic acid, hydrophobised pyrogenic silicic acid, pyrogenic mixed oxides or pyrogenic aluminium oxides.
    Type: Application
    Filed: April 5, 2002
    Publication date: March 6, 2003
    Inventors: Alfons Karl, Gerd Tauber, Werner Kalbitz, Horst Kleinhenz, Ralph McIntosh, Stephan Ludtke