Patents by Inventor Christina Schank

Christina Schank 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).

  • Multilayer interference pigments
    Patent number: 7169222
    Abstract: Multilayer interference pigment consisting of a transparent carrier material coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by alternate coating of the transparent carrier material with a metal oxide of high refractive index and with a metal oxide of low refractive index in a wet process by hydrolysis of the corresponding water-soluble metal compounds, separation, drying and, if desired, calcination of the resulting pigment.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: January 30, 2007
    Assignee: Merck Patent GmbH
    Inventors: Hans-Dieter Brückner, Andrea Heyland, Christoph Schmidt, Christina Schank, Claudia Seibel
  • Multilayer interference pigments
    Publication number: 20050241530
    Abstract: Multilayer interference pigment consisting of a transparent carrier material coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by alternate coating of the transparent carrier material with a metal oxide of high refractive index and with a metal oxide of low refractive index in a wet process by hydrolysis of the corresponding water-soluble metal compounds, separation, drying and, if desired, calcination of the resulting pigment.
    Type: Application
    Filed: July 11, 2005
    Publication date: November 3, 2005
    Inventors: Hans-Dieter Bruckner, Andrea Heyland, Christoph Schmidt, Christina Schank, Claudia Seibel
  • Multilayer interference pigments
    Publication number: 20040144023
    Abstract: Multilayer interference pigment consisting of a transparent carrier material coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by alternate coating of the transparent carrier material with a metal oxide of high refractive index and with a metal oxide of low refractive index in a wet process by hydrolysis of the corresponding water-soluble metal compounds, separation, drying and, if desired, calcination of the resulting pigment.
    Type: Application
    Filed: January 15, 2004
    Publication date: July 29, 2004
    Inventors: Hans-Dieter Bruckner, Andrea Heyland, Christoph Schmidt, Christina Schank, Claudia Seibel
  • Multilayer interference pigments
    Patent number: 6689205
    Abstract: Multilayer interference pigment consisting of a transparent carrier material coated with alternating layers of metal oxides of low and high refractive index, the difference in the refractive indices being at least 0.1, which is obtainable by alternate coating of the transparent carrier material with a metal oxide of high refractive index and with a metal oxide of low refractive index in a wet process by hydrolysis of the corresponding water-soluble metal compounds, separation, drying and, if desired, calcination of the resulting pigment.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: February 10, 2004
    Assignee: Merck Patent Gesellschaft
    Inventors: Hans-Dieter Brückner, Andrea Heyland, Christoph Schmidt, Christina Schank, Claudia Seibel
  • Transparent medium with angular-selective transmitting or reflecting properties
    Patent number: 6602340
    Abstract: The invention relates to a transparent medium comprising pearl lustre pigments having angle-selective reflection and/or transmission properties and to the use thereof, especially in transparent thermal insulation systems (TIMs).
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: August 5, 2003
    Assignee: Merck Patent GmbH
    Inventors: Christina Schank, Gerhard Pfaff, Alexandra Brownfield, Joachim Weitzel, Wolfgang Hechler
  • Interference pigments
    Patent number: 6596070
    Abstract: The present invention relates to interference pigments on the basis of multiply coated, platelet-shaped substrates which comprise at least one layer sequence comprising (A) a coating having a refractive index n≧2.0, (B) a colorless coating having a refractive index n≦1.8, and (C) a nonabsorbing coating of high refractive index, and, if desired, (D) an external protective layer.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: July 22, 2003
    Assignee: Merck Patent Gesellschaft
    Inventors: Christoph Schmidt, Gerhard Pfaff, Christina Schank, Sabine Schoen
  • Multilayer interference pigment with transparent central layer
    Patent number: 6156115
    Abstract: Multilayer interference pigment consisting of a central layer of a transparent or semitransparent material of low refractive index and alternating layers of a metal or of a material of high refractive index and of a material of low refractive index either side of the central layer, the material of low refractive index preferably being magnesium fluoride or acrylate and the metal preferably being aluminium or chromium.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: December 5, 2000
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Gerhard Pfaff, Gerd Bauer, Martin Friz, Matthias Kuntz, Christina Schank
  • Multilayer interference pigment with absorbent central layer
    Patent number: 6132504
    Abstract: Multilayer interference pigment consisting of a central, absorbing layer and alternating layers of a material of low refractive index and of a metal or of a material of high refractive index either side of the central layer, the material of low refractive index preferably being acrylate and the metal being aluminium or chromium. The absorbing layer consists of a coating system which comprises carbon black or color-imparting absorption pigments.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: October 17, 2000
    Assignee: Merck Patent Gesellschaft mit Berschrankter Haftung
    Inventors: Matthias Kuntz, Gerhard Pfaff, Gerd Bauer, Christina Schank