Patents by Inventor Kumiko Gorai

Kumiko Gorai 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).

  • Patent number: 10230057
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: March 12, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 10147889
    Abstract: A biscarbazole derivative having a specific group, which is represented by formula (1): and an organic electroluminescence device in which a plurality of organic thin-film layers including a light emitting layer are disposed between a cathode and an anode, and at least one of the organic thin-film layers include the biscarbazole derivative. The organic electroluminescence device exhibits high emission efficiency and has a long lifetime. In formula (1), each of A1 and A2 independently represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms; each of Y1 to Y16 independently represents C(R) or a nitrogen atom; each of R groups independently represents a hydrogen atom, etc.; and each of L1 and L2 independently represents a single bond, etc.; provided that at least one of A1, A2 and R represents a substituted or unsubstituted fluoranthenyl group, etc.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: December 4, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Kumiko Gorai, Kazuki Nishimura, Kiyoshi Ikeda
  • Publication number: 20180047917
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Application
    Filed: October 9, 2017
    Publication date: February 15, 2018
    Applicant: IDEMITSU KOSAN CO., LTD
    Inventors: Tetsuya INOUE, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 9818958
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: November 14, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Publication number: 20160240795
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Application
    Filed: April 27, 2016
    Publication date: August 18, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 9373802
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: June 21, 2016
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado