Patents by Inventor Jürgen Kischkewitz

Jürgen Kischkewitz 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).

  • Iron oxide pigments containing Al
    Patent number: 11634342
    Abstract: Aluminium-containing iron oxide pigments of the formula Fe2-xAlxO3 with x values from 0.01 to 0.25, characterized in that they possess an a* value of 30.5 to 32.5 CIELAB units and a b* value of 25.5 to 30.5 CIELAB units, measured in each case as full shade in the alkyd resin according to DIN EN ISO 787-25:2007.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: April 25, 2023
    Assignee: LANXESS Deutschland GmbH
    Inventors: Kai Buetje, Christine Kathrein, Carsten Rosenhahn, Juergen Kischkewitz, Ulrich Meisen, Peter Koehler
  • IRON OXIDE PIGMENTS CONTAINING AL
    Publication number: 20220259064
    Abstract: Aluminium-containing iron oxide pigments of the formula Fe2-xAlxO3 with x values from 0.01 to 0.25, characterized in that they possess an a* value of 30.5 to 32.5 CIELAB units and a b* value of 25.5 to 30.5 CIELAB units, measured in each case as full shade in the alkyd resin according to DIN EN ISO 787-25:2007.
    Type: Application
    Filed: March 21, 2022
    Publication date: August 18, 2022
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Kai BUETJE, Christine KATHREIN, Carsten ROSENHAHN, Juergen KISCHKEWITZ, Ulrich MEISEN, Peter KOEHLER
  • IRON OXIDE PIGMENTS CONTAINING AL
    Publication number: 20210107803
    Abstract: Aluminium-containing iron oxide pigments of the formula Fe2-xAlxO3 with x values from 0.01 to 0.25, characterized in that they possess an a* value of 30.5 to 32.5 CIELAB units and a b* value of 25.5 to 30.5 CIELAB units, measured in each case as full shade in the alkyd resin according to DIN EN ISO 787-25: 2007.
    Type: Application
    Filed: March 19, 2018
    Publication date: April 15, 2021
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Kai BUETJE, Christine KATHREIN, Carsten ROSENHAHN, Juergen KISCHKEWITZ, Ulrich MEISEN, Koehler KOEHLER
  • USE OF RED IRON OXIDE PIGMENTS IN AQUEOUS PREPARATIONS
    Publication number: 20190071573
    Abstract: The present invention relates to the use of a haematite pigment whose sum of the a* values in full shade and with reduction in the surface coating test is from 58.0 to 61.0 CIELAB units, preferably from 58.0 to 60.0 CIELAB units, more preferably from 58.5 to 61.0 CIELAB units, more preferably from 58.5 to 60.0 CIELAB units, particularly preferably from 59.0 to 61.0 CIELAB units, more particularly preferably from 59.0 to 60.0 for producing an aqueous, titanium dioxide-containing preparation.
    Type: Application
    Filed: March 15, 2017
    Publication date: March 7, 2019
    Applicant: LANXESS Deutschland GmbH
    Inventors: Stephan SPIEGELHAUER, Carsten ROSENHAHN, Waldemar CZAPLIK, Juergen KISCHKEWITZ
  • Production of red iron oxide pigment
    Patent number: 10221326
    Abstract: The present invention relates to an improved process for producing red iron oxide pigments by the Penniman process with nitrate (also called nitrate process or direct red process) and to apparatus for implementing this process, and also to the use of the plant for producing red iron oxide pigments by the Penniman process with nitrate.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: March 5, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Waldemar Czaplik, Juergen Kischkewitz, Wolfgang Oehlert, Huajun Li
  • PRODUCTION OF RED IRON OXIDE PIGMENT
    Publication number: 20160272836
    Abstract: The present invention relates to an improved process for producing red iron oxide pigments by the Penniman process with nitrate (also called nitrate process or direct red process) and to apparatus for implementing this process, and also to the use of the plant for producing red iron oxide pigments by the Penniman process with nitrate.
    Type: Application
    Filed: November 8, 2013
    Publication date: September 22, 2016
    Inventors: Waldemar CZAPLIK, Juergen KISCHKEWITZ, Wolfgang OEHLERT, Huajun LI
  • Method for producing finely divided haematite and for producing iron oxide red pigments
    Patent number: 9428402
    Abstract: The present invention relates to an improved process for the production of finely divided haematite and of iron oxide red pigments made up of the finely divided haematite and the use of the finely divided haematites and iron oxide red pigments produced by this process.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: August 30, 2016
    Assignee: LANXESS Deutschland GmbH
    Inventors: Guido Ketteler, Udo Holtmann, Juergen Kischkewitz
  • METHOD FOR PRODUCING FINELY DIVIDED HAEMATITE AND FOR PRODUCING IRON OXIDE RED PIGMENTS
    Publication number: 20140205664
    Abstract: The present invention relates to an improved process for the production of finely divided haematite and of iron oxide red pigments made up of the finely divided haematite and the use of the finely divided haematites and iron oxide red pigments produced by this process.
    Type: Application
    Filed: September 28, 2012
    Publication date: July 24, 2014
    Applicant: LANXESS DEUTSCHLAND GmbH
    Inventors: Guido Ketteler, Udo Holtmann, Juergen Kischkewitz
  • OIL- AND WAX-CONTAINING COMPOSITIONS IN PIECE FORM FOR THE COLORING OF ASPHALT AND BITUMEN
    Publication number: 20140083330
    Abstract: The present invention concerns agents containing at least one inorganic pigment, one or more oils, and one or more waxes, and also processes for production thereof and their use for coloration of building products, preferably asphalt, bitumen, bituminous mixtures, tar and tar-containing compositions, and also a process for coloration of building products and the building products colored with the agents.
    Type: Application
    Filed: December 30, 2011
    Publication date: March 27, 2014
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Krzysztof Chlopek, Jürgen Kischkewitz, Lutz Kohnert, Holger Inden
  • Pigment/auxiliary combination having improved colour properties
    Patent number: 8414698
    Abstract: The present invention relates to a pigment/auxiliary combination having an improved chroma and/or relative color strength, to its production and to its use.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: April 9, 2013
    Assignee: LANXESS Deutschland GmbH
    Inventors: Holger Friedrich, Jürgen Kischkewitz, Gerald Büchner
  • Adsorption vessels
    Patent number: 7942953
    Abstract: The present invention relates to a filtration unit containing pellets or granules of fine-particle iron oxides and/or iron oxyhydroxides with a large specific surface area, processes for their production and processes for their use in the filtration units.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: May 17, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventors: Andreas Schlegel, Peter Bailly, Jürgen Kischkewitz, Klaus Rohbock
  • Contact and adsorbent granules
    Patent number: 7811360
    Abstract: The present invention relates to a unit suitable for the through-flow of a fluid medium at least partially filled with an adsorbent/catalyst in pellet form consisting essentially of iron oxide and/or iron oxyhydroxides, solidified with oxides and/or (oxy)hydroxides of the elements Al, Mg and Ti, the pellets or granules based on iron oxides and/or iron oxyhydroxides and iron(III) hydroxide for the absorbent/catalyst, and processes for their production and their use.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: October 12, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Andreas Schlegel, Jürgen Kischkewitz
  • Contact and adsorbent granules
    Patent number: 7767001
    Abstract: The present invention relates to pellets or granules based on iron oxides and/or iron oxyhydroxides and iron(III) hydroxide, a unit suitable for the through-flow of a fluid medium at least partially filled with an adsorbent/catalyst in pellet form consisting essentially of iron oxide and/or iron oxyhydroxide embedded in an iron hydroxide matrix, processes for their production comprising filtering, drying and shaping steps and their processes of their use.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: August 3, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Andreas Schlegel, Peter Bailly, Jürgen Kischkewitz, Klaus Rohbock
  • PIGMENT GRANULES WHICH CONTAIN INORGANIC FILTER AIDS
    Publication number: 20100154680
    Abstract: The present invention relates to pigment granules which contain inorganic filter aids and a process for the production thereof and their use for colouring lime- and/or cement-bound building materials, asphalt, paints, finishes, paper or plastics.
    Type: Application
    Filed: August 20, 2009
    Publication date: June 24, 2010
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Holger Friedrich, Herbert Kunstmann, Krzysztof Chlopek, Jüergen Kischkewitz
  • Contact and adsorbent granules
    Publication number: 20080271600
    Abstract: The present invention relates to pellets or granules based on iron oxides and/or iron oxyhydroxides and iron(III) hydroxide, a unit suitable for the through-flow of a fluid medium at least partially filled with an adsorbent/catalyst in pellet form consisting essentially of iron oxide and/or iron oxyhydroxide embedded in an iron hydroxide matrix, processes for their production comprising filtering, drying and shaping steps and their processes of their use.
    Type: Application
    Filed: July 7, 2008
    Publication date: November 6, 2008
    Inventors: Andreas Schlegel, Peter Bailly, Jürgen Kischkewitz, Klaus Rohbock