Patents by Inventor Ewa PTAK

Ewa PTAK 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).

  • Dichroic dye composition
    Patent number: 11939512
    Abstract: The present invention relates to compositions comprising a combination of benzothiadiazole and thiadiazoloquinoxaline derivatives, to liquid-crystalline media containing the compositions, and to the use of the compositions and the media in optical, electronic and electro-optical devices, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in switchable windows.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: March 26, 2024
    Assignee: Merck Patent GmbH
    Inventors: Michael Junge, Ewa Ptak, Christoph Wetzel
  • Liquid-crystalline medium for use in a switching element
    Patent number: 11760931
    Abstract: The present invention relates to liquid-crystalline media comprising one or more mesogenic compounds of formula I as set forth hereinafter, wherein the one or more compounds of formula I are contained in the medium in an amount, based on the overall contents of the medium, of at least 15% by weight. The present invention further relates to a switching layer, a switching element and a window element containing the liquid-crystalline medium.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: September 19, 2023
    Assignee: Merck Patent GmbH
    Inventors: Michael Junge, Andreas Beyer, Mila Fischer, Ewa Ptak
  • Liquid crystalline medium
    Patent number: 11667845
    Abstract: The present invention relates to benzotriazole derivatives selected from the group of compounds of formulae Ia, Ib and Ic as defined in claim 1, to mesogenic media comprising the compounds of formulae Ia, Ib and Ic, and to the use of these compounds and mesogenic media in optical, electronic and electro-optical applications, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in windows.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: June 6, 2023
    Assignee: MERCK PATENT GMBH
    Inventors: Peer Kirsch, Michael Junge, Ursula Patwal, Ewa Ptak, Theresa Lorenz
  • DICHROIC DYE COMPOSITION
    Publication number: 20230053362
    Abstract: The present invention relates to compositions comprising a combination of benzothiadiazole and thiadiazoloquinoxaline derivatives, to liquid-crystalline media containing the compositions, and to the use of the compositions and the media in optical, electronic and electro-optical devices, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in switchable windows.
    Type: Application
    Filed: November 21, 2019
    Publication date: February 23, 2023
    Applicant: Merck Patent GmbH
    Inventors: Michael JUNGE, Ewa PTAK, Christoph WETZEL
  • LIQUID CRYSTALLINE MEDIUM
    Publication number: 20210238481
    Abstract: The present invention relates to benzotriazole derivatives selected from the group of compounds of formulae Ia, Ib and Ic as defined in claim 1, to mesogenic media comprising the compounds of formulae Ia, Ib and Ic, and to the use of these compounds and mesogenic media in optical, electronic and electro-optical applications, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in windows.
    Type: Application
    Filed: June 7, 2019
    Publication date: August 5, 2021
    Applicant: MERCK PATENT GMBH
    Inventors: Peer KIRSCH, Michael JUNGE, Ursula PATWAL, Ewa PTAK, Theresa LORENZ
  • LIQUID-CRYSTALLINE MEDIUM FOR USE IN A SWITCHING ELEMENT
    Publication number: 20210163820
    Abstract: The present invention relates to liquid-crystalline media comprising one or more mesogenic compounds of formula I as set forth hereinafter, wherein the one or more compounds of formula I are contained in the medium in an amount, based on the overall contents of the medium, of at least 15% by weight. The present invention further relates to a switching layer, a switching element and a window element containing the liquid-crystalline medium.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 3, 2021
    Applicant: Merck Patent GmbH
    Inventors: Michael JUNGE, Andreas BEYER, Mila FISCHER, Ewa PTAK