Patents by Inventor Kathrin Lehmann

Kathrin Lehmann 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).

  • USE OF ORGANOFUNCTIONALLY MODIFIED POLYSILOXANES CONTAINING PHENYL DERIVATIVES AS DISPERSANTS AND WETTING AGENTS FOR FILLERS AND PIGMENTS IN AQUEOUS PIGMENT PASTES AND INK OR PAINT FORMULATIONS
    Publication number: 20050257717
    Abstract: The invention relates to the use of organofunctionally modified polysiloxanes containing phenyl derivatives as dispersants for preparing aqueous pigment formulations, paints, coating materials, and coatings. For the purposes of this invention the term “polysiloxanes” shall be understood to embrace oligomeric siloxanes as well.
    Type: Application
    Filed: July 18, 2003
    Publication date: November 24, 2005
    Inventors: Wilfried Knott, Kathrin Lehmann, Stefan Silber
  • Dispersants for preparing aqueous pigment pastes
    Publication number: 20050085563
    Abstract: The invention relates to the use of copolymers with styrene-oxide-based, vinyl-functionalized polyethers for preparing aqueous pigment preparations.
    Type: Application
    Filed: October 19, 2004
    Publication date: April 21, 2005
    Inventors: Jutta Esselborn, Philippe Favresse, Kathrin Lehmann, Ute Linke, Angela Ruttgerodt, Stefan Silber
  • Organopolysiloxanes for defoaming aqueous systems
    Patent number: 6858663
    Abstract: The invention relates to the use of water-insoluble organopolysiloxane derivatives of the general formula (I) in which the radicals R1 are alkyl radicals, preferably having 1 to 4 carbon atoms or aryl radicals, but at least 80% of the radicals R1 are methyl radicals, and R2 at least once in the molecule has the definition (a) for defoaming aqueous media, especially printing inks and paints.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: February 22, 2005
    Assignee: Goldschmidt AG
    Inventors: Wilfried Knott, Kathrin Lehmann, Martina Lüger, Stefan Silber
  • Organopolysiloxanes for defoaming aqueous systems
    Publication number: 20040229964
    Abstract: The invention relates to the use of water-insoluble organopolysiloxane derivatives of the general formula (I) 1
    Type: Application
    Filed: July 14, 2003
    Publication date: November 18, 2004
    Inventors: Wilfried Knott, Kathrin Lehmann, Martina Luger, Stefan Silber
  • Low surface tension surfactants based on amino alcohol and their use
    Publication number: 20040229768
    Abstract: The invention provides low surface tension surfactants based on amino alcohol and also provides for their use in aqueous coating formulations, said surfactants being preparable by reacting at least one secondary amine of formula (I): 1
    Type: Application
    Filed: May 12, 2004
    Publication date: November 18, 2004
    Inventors: Gaetano Blanda, Ingrid Eibmann, Kathrin Lehmann, Heike Luther, Stefan Silber, Philipp Tomuschat
  • Use of silicone resins as dispersants
    Publication number: 20040152828
    Abstract: The invention provides for the use of silicone resins obtainable by reacting
    Type: Application
    Filed: January 22, 2004
    Publication date: August 5, 2004
    Inventors: Petra Brandt, Kathrin Lehmann, Sascha Oestreich, Cornelia Schroter, Stefan Silber
  • Phosphoric esters as emulsifiers and dispersants
    Patent number: 6689731
    Abstract: The invention relates to the use of particular phosphoric esters as emulsifiers and dispersants for pigments and fillers, based on polystyrene-block (b)-polyalkylene oxide copolymers. The invention provides block copolymeric phosphoric esters and their salts of the general formula (I) [R1O(SO)a(EO)b(CH2CHCH3O)c(BO)d]xPO—(OH)3−x  (I) where R1=a straight-chain or branched or cycloaliphatic radical having 1 to 22 carbon atoms, SO=styrene oxide, EO=ethylene oxide, BO=butylene oxide and a=1 to<2, b=3 to 100, c=0 to 10, d=0 to 3, x=1 or 2 where b≧a+c+d.
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: February 10, 2004
    Assignee: Goldschmidt AG
    Inventors: Eberhard Esselborn, Wernfried Heilen, Kathrin Lehmann, Ellen Reuter, Stefan Silber, Andreas Stüttgen
  • High-concentration aqueous dispersions comprising hydrophilic microfine metal oxide particles and dispersion auxiliaries
    Publication number: 20030229172
    Abstract: Aqueous dispersions comprising microfine metal oxide particles and dispersion auxiliaries, wherein, as dispersion auxiliaries, at least one of the compounds of the general formula (I) 1
    Type: Application
    Filed: June 6, 2003
    Publication date: December 11, 2003
    Applicants: Goldschmidt AG, Degussa AG
    Inventors: Christoph Batz-Sohn, Petra Brandt, Thomas Dietz, Steffen Hasenzahl, Klaus Jenni, Kathrin Lehmann, Ralf Mathiak, Angela Ruttgerodt
  • High-concentration aqueous dispersions comprising hydrophobic microfine metal oxide particles and dispersion auxiliaries
    Publication number: 20030228271
    Abstract: Aqueous dispersions comprising:
    Type: Application
    Filed: June 6, 2003
    Publication date: December 11, 2003
    Applicants: Goldschmidt AG, Degussa AG
    Inventors: Christoph Batz-Sohn, Petra Brandt, Thomas Dietz, Steffen Hasenzahl, Klaus Jenni, Kathrin Lehmann, Ralf Mathiak, Angela Ruttgerodt
  • Phosphoric esters as emulsifiers and dispersants
    Publication number: 20020011183
    Abstract: The invention relates to the use of particular phosphoric esters as emulsifiers and dispersants for pigments and fillers, based on polystyrene-block (b)-polyalkylene oxide copolymers.
    Type: Application
    Filed: May 23, 2001
    Publication date: January 31, 2002
    Inventors: Eberhard Esselborn, Wernfried Heilen, Kathrin Lehmann, Ellen Reuter, Stefan Silber, Andreas Stuttgen