Patents by Inventor Julia KOHLSTEDT

Julia KOHLSTEDT 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).

  • 1-functionalized dibenzofurans and dibenzothiophenes for organic light emitting diodes (OLEDs)
    Patent number: 10584126
    Abstract: The present invention relates to compounds of formula(I), a process for their production and their use in electronic devices, especially electroluminescent devices. When used as charge transport material and/or host material for phosphorescent emitters in electroluminescent devices, the compounds of formula I may provide improved efficiency and reduced driving voltage of electroluminescent devices.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: March 10, 2020
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Yuichi Nishimae, Julia Kohlstedt, Thomas Schaefer, Hideaki Nagashima
  • 1-FUNCTIONALIZED DIBENZOFURANS AND DIBENZOTHIOPHENES FOR ORGANIC LIGHT EMITTING DIODES (OLEDS)
    Publication number: 20170362241
    Abstract: The present invention relates to compounds of formula(I), a process for their production and their use in electronic devices, especially electroluminescent devices. When used as charge transport material and/or host material for phosphorescent emitters in electroluminescent devices, the compounds of formula I may provide improved efficiency and reduced driving voltage of electroluminescent devices.
    Type: Application
    Filed: December 15, 2015
    Publication date: December 21, 2017
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Yuichi NISHIMAE, Julia KOHLSTEDT, Thomas SCHAEFER, Hideaki NAGASHIMA