Patents by Inventor Hirokatsu Ito

Hirokatsu Ito 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: 11479544
    Abstract: A novel compound represented by formula (1): wherein R1 to R7, R11 to R18, L1 to L3, a to c, n, and Ar are as defined in the description, provides an organic electroluminescence device having a device lifetime further improved.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: October 25, 2022
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu Ito, Tasuku Haketa, Yu Kudo
  • Publication number: 20220278283
    Abstract: The compound represented by formula (1): wherein A, B, R1, and R2 are as defined in the description, provides organic electroluminescence (EL) devices having a high emission efficiency when operated at low voltage and a long lifetime and electronic devices including such organic EL devices.
    Type: Application
    Filed: April 29, 2022
    Publication date: September 1, 2022
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota TAKAHASHI, Tomoki KATO, Hirokatsu ITO, Masahiro KAWAMURA, Masakazu FUNAHASHI, Hiroyuki SAITO, Yuichiro KAWAMURA, Yoshiaki TAKAHASHI, Tetsuya MASUDA, Hitoshi KUMA
  • Publication number: 20220246857
    Abstract: Provided are a compound capable of more improving the performance of organic EL devices, an organic electroluminescent device having a more improved device performance, and an electronic device including such an organic electroluminescent device; precisely, a compound represented by the following formula (1) wherein X1, X2, X3, L, R1 to R3, R5 to R8, R11 to R13, R15 to R18, R21 to R24, and R25 to R28 are as defined in the description, an organic electroluminescent device containing the compound, and an electronic device including such an organic electroluminescent device.
    Type: Application
    Filed: May 29, 2020
    Publication date: August 4, 2022
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yusuke TAKAHASHI, Tasuku HAKETA, Hirokatsu ITO, Yu KUDO
  • Publication number: 20220238805
    Abstract: A compound represented by the following formula (1) wherein the symbols are as defined in the description, and an organic electroluminescent device containing the compound.
    Type: Application
    Filed: March 25, 2022
    Publication date: July 28, 2022
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki ITOI, Tasuku HAKETA, Yusuke TAKAHASHI, Shota TANAKA, Hirokatsu ITO
  • Patent number: 11283025
    Abstract: A compound represented by formula (1): wherein R1 to R5, a to e, L1 to L3, Ar, and X are as defined in the description.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: March 22, 2022
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Taro Yamaki, Tomoki Kato, Masahiro Kawamura, Hirokatsu Ito
  • Publication number: 20220045272
    Abstract: The present invention relates to a compound represented by the formula (1): wherein R1 to R4 and L1 to L4 are those defined in the specification, and Ar is the following formula (A) or (B): wherein R11 to R18 and R20 to R29 are those defined in the specification, and Ar is one defined in the specification.
    Type: Application
    Filed: December 3, 2019
    Publication date: February 10, 2022
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tasuku HAKETA, Hirokatsu ITO, Yu KUDO
  • Publication number: 20210384445
    Abstract: This organic electroluminescence element includes an anode, a cathode, and an organic layer disposed between the anode and the cathode. The organic layer includes a light-emitting layer and at least one layer disposed between the light-emitting layer and the anode. The light-emitting layer includes a compound represented by formula (1), and the at least one layer disposed between the light-emitting layer and the anode includes a compound represented by formula (2).
    Type: Application
    Filed: August 9, 2018
    Publication date: December 9, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yuki NAKANO, Hirokatsu ITO, Tetsuya MASUDA
  • Publication number: 20210363096
    Abstract: A compound represented by formula (1) provides a high performance organic electroluminescence device and a novel material for realizing such an organic electroluminescence device: wherein R1 to R6, a to f, L1 to L3, and Ar are as defined in the description.
    Type: Application
    Filed: August 10, 2021
    Publication date: November 25, 2021
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki KATO, Taro YAMAKI, Masahiro KAWAMURA, Hirokatsu ITO
  • Patent number: 11117857
    Abstract: A compound represented by formula (1) provides a high performance organic electroluminescence device and a novel material for realizing such an organic electroluminescence device: wherein R1 to R6, a to f, L1 to L3, and Ar are as defined in the description.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: September 14, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Taro Yamaki, Masahiro Kawamura, Hirokatsu Ito
  • Publication number: 20210253546
    Abstract: Provided is an organic electroluminescent element comprising a compound that is represented by formula (1) and having a more improved lifetime. (In the formula, X, R1-R8, R11-R17, R21-R30, L1, L2, n, and Ar1-Ar3 are as defined in the description.
    Type: Application
    Filed: May 10, 2019
    Publication date: August 19, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Hirokatsu ITO, Tasuku HAKETA, Yu KUDO
  • Patent number: 11053229
    Abstract: A compound represented by formula (1): wherein R1 to R7, R11 to R18, L1 to L3, a to c, n, and Ar are as defined in the description, provides an organic electroluminescence device having an emission efficiency and a device lifetime further improved.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: July 6, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu Ito, Tasuku Haketa, Yu Kudo, Yumiko Mizuki
  • Patent number: 11053437
    Abstract: Provided are a compound capable of more improving the performance of organic EL devices, an organic electroluminescent device having a more improved device performance, and an electronic device including such an organic electroluminescent device; precisely, a compound represented by the following formula (1); wherein N*, Ar, *a, R11 to R15, R21 to R27, R31 to R37, R41 to R45, and R51 to R55 are as defined in the description, an organic electroluminescent device containing the compound, and an electronic device including such an organic electroluminescent device.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: July 6, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yu Kudo, Tasuku Haketa, Hirokatsu Ito, Yusuke Takahashi
  • Publication number: 20210094937
    Abstract: A compound represented by formula (1) provides an organic electroluminescence device having lifetime further improved: wherein R1 to R9, R11 to R18, R21 to R27, Ar, L1, L2, and L3 are as defined in the description.
    Type: Application
    Filed: March 25, 2019
    Publication date: April 1, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Hirokatsu ITO, Tasuku HAKETA, Yu KUDO
  • Patent number: 10964891
    Abstract: An organic light-emitting medium including a pyrene derivative represented by the following formula (1) and a phenyl-substituted anthracene derivative represented by the following formula (2): wherein Ar1 to Ar4 are independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 20 ring atoms.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: March 30, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yumiko Mizuki, Hirokatsu Ito, Takeshi Ikeda, Hiroyuki Saito, Masahiro Kawamura, Yuichiro Kawamura
  • Patent number: 10941144
    Abstract: A compound represented by formula (1): wherein R1 to R8, R12 to R18, R21 to R25, R31 to R48, L1 to L3, and Ar are as defined in the specification, provides a high performance organic electroluminescence device which comprises a cathode, an anode and an organic layer between the cathode and the anode, wherein the organic layer comprises a light emitting layer and at least one layer of the organic layer comprises the compound.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: March 9, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tasuku Haketa, Hirokatsu Ito, Yu Kudo
  • Publication number: 20210062082
    Abstract: Provided are a compound capable of more improving the performance of organic EL devices, an organic electroluminescent device having a more improved device performance, and an electronic device including such an organic electroluminescent device; precisely, a compound represented by the following formula (1); wherein N*, Ar, *a, R11 to R15, R21 to R27, R31 to R37, R41 to R45, and R51 to R55 are as defined in the description, an organic electroluminescent device containing the compound, and an electronic device including such an organic electroluminescent device.
    Type: Application
    Filed: November 13, 2020
    Publication date: March 4, 2021
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yu KUDO, Tasuku HAKETA, Hirokatsu ITO, Yusuke TAKAHASHI
  • Publication number: 20210066611
    Abstract: A compound that is capable of achieving an organic EL device that has a high external quantum efficiency and a long lifetime is to be provided, and a compound represented by the following formula (1) is used (wherein in the formula, R11 to R17, R21 to R28, R31 to R38, R41 to R45, R51 to R55, R61 to R64, and L1 are defined in the description).
    Type: Application
    Filed: January 28, 2019
    Publication date: March 4, 2021
    Applicant: IDEMITSU KOSAN CO,. LTD.
    Inventors: Hirokatsu ITO, Tasuku HAKETA, Yu KUDO
  • Publication number: 20200392122
    Abstract: A compound represented by formula (1): wherein R1 to R7, R11 to R18, L1 to L3, a to c, n, and Ar are as defined in the description, provides an organic electroluminescence device having an emission efficiency and a device lifetime further improved.
    Type: Application
    Filed: March 7, 2018
    Publication date: December 17, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu ITO, Tasuku HAKETA, Yu KUDO, Yumiko MIZUKI
  • Patent number: 10840456
    Abstract: A compound represented by formula (1): wherein each symbol is as defined in the specification, provides a high performance organic electroluminescence device which comprises a cathode, an anode and an organic layer between the cathode and the anode, wherein the organic layer comprises a light emitting layer and at least one layer of the organic layer comprises the compound.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: November 17, 2020
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tasuku Haketa, Hirokatsu Ito, Yu Kudo
  • Publication number: 20200317653
    Abstract: An organic electroluminescence device having an improved performance and a compound represented by formula (1), which is a novel material that enables the organic electroluminescence device: wherein, X, Ar1 to Ar5, R1 to R20, *a, and *b are the same as those defined in the specification.
    Type: Application
    Filed: May 22, 2020
    Publication date: October 8, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu Ito, Tasuku Haketa, Yu Kudo, Yusuke Takahashi