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: 11939279
    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 10, 2021
    Date of Patent: March 26, 2024
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Taro Yamaki, Masahiro Kawamura, Hirokatsu Ito
  • Patent number: 11744149
    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: Grant
    Filed: August 10, 2022
    Date of Patent: August 29, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yusuke Takahashi, Tasuku Haketa, Hirokatsu Ito, Yu Kudo
  • Patent number: 11730054
    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: Grant
    Filed: September 6, 2022
    Date of Patent: August 15, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu Ito, Tasuku Haketa, Yu Kudo
  • Publication number: 20230227397
    Abstract: A compound may improve the capability of an organic EL device, and an organic electroluminescent device including such compound may have improved capability and may be included in electronic devices. Such compounds may be of formula (1A) or formula (1B) (wherein the symbols are as defined in the description) organic electroluminescent device(s) may contain such compound(s), and electronic device(s) may include such organic electroluminescent device(s).
    Type: Application
    Filed: October 9, 2020
    Publication date: July 20, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yusuke TAKAHASHI, Tasuku HAKETA, Shota TANAKA, Hirokatsu ITO, Yu KUDO
  • Publication number: 20230200222
    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: February 22, 2023
    Publication date: June 22, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Hiroaki ITOI, Tasuku HAKETA, Yusuke TAKAHASHI, Shota TANAKA, Hirokatsu ITO
  • Patent number: 11678569
    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: Grant
    Filed: March 25, 2022
    Date of Patent: June 13, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki Itoi, Tasuku Haketa, Yusuke Takahashi, Shota Tanaka, Hirokatsu Ito
  • Publication number: 20230172058
    Abstract: A compound may be capable of further improving the capability of an organic EL device. An organic electroluminescent device may have a further improved device capability using such compound(s). An electronic device may include such an organic electroluminescent device. Such compounds may have formula (1) wherein the symbols are as defined in the description.
    Type: Application
    Filed: March 23, 2021
    Publication date: June 1, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Tasuku HAKETA, Yusuke TAKAHASHI, Shota TANAKA, Hirokatsu ITO
  • Patent number: 11665962
    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: Grant
    Filed: August 9, 2018
    Date of Patent: May 30, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuki Nakano, Hirokatsu Ito, Tetsuya Masuda
  • Publication number: 20230159479
    Abstract: a compound represented by formula (A): wherein Ar, R1 to R7, R11 to R14, R21 to R24, R31 to R34, *1, and R41 to R48 are as defined in the description provides organic electroluminescence devices with improved device performance.
    Type: Application
    Filed: January 24, 2023
    Publication date: May 25, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yu KUDO, Tasuku HAKETA, Hirokatsu ITO
  • Publication number: 20230118654
    Abstract: A compound that further improves the performance of an organic EL device, an organic electroluminescent device having a further improved device performance, and an electronic device including the organic EL device are provided, and a compound represented by the following formula (1) (the symbols in the formula are defined in the description), an organic electroluminescent device including the compound, and an electronic device including the organic electroluminescent device are provided.
    Type: Application
    Filed: February 3, 2021
    Publication date: April 20, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Tasuku HAKETA, Yusuke TAKAHASHI, Shota TANAKA, Hirokatsu ITO
  • Patent number: 11618740
    Abstract: A compound represented by formula (A): wherein Ar, R1 to R7, R11 to R14, R21 to R24, R31 to R34, *1, and R41 to R48 are as defined in the description provides organic electroluminescence devices with improved device performance.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: April 4, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yu Kudo, Tasuku Haketa, Hirokatsu Ito
  • Publication number: 20230047512
    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: September 6, 2022
    Publication date: February 16, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Hirokatsu ITO, Tasuku HAKETA, Yu KUDO
  • Publication number: 20230024273
    Abstract: Provided are: a compound that further improves the capability of an organic EL device, an organic electroluminescent device having a further improved device capability, and an electronic device including the organic electroluminescent device. Precisely provided are: a compound represented by the following formula (1A) or formula (1B) (wherein the symbols are as defined in the description), an organic electroluminescent device containing the compound, and an electronic device including the organic electroluminescent device.
    Type: Application
    Filed: October 9, 2020
    Publication date: January 26, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yusuke TAKAHASHI, Tasuku HAKETA, Shota TANAKA, Hirokatsu ITO, Yu KUDO
  • Publication number: 20230026162
    Abstract: Provided are a compound that further improves the capability of an organic EL device, an organic electroluminescent device having a further improved device capability, and an electronic device including the organic electroluminescent device. Precisely provided are: a compound represented by the following formula (1) (wherein N*, Ar, L, X, *a, *b1, *b2, *b3, m, n, R11 to R14, R15 to R22, R31 to R40, and R41 to R48 are as defined in the description), an organic electroluminescent device containing the compound, and an electronic device including the organic electroluminescent device.
    Type: Application
    Filed: October 9, 2020
    Publication date: January 26, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Tasuku HAKETA, Hirokatsu ITO, Yu KUDO, Yusuke TAKAHASHI, Shota TANAKA
  • Publication number: 20230023811
    Abstract: Compounds of formula (1): wherein each symbol is as defined in the description, may provide an organic electroluminescence device having a further improved performance.
    Type: Application
    Filed: September 18, 2020
    Publication date: January 26, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yusuke TAKAHASHI, Tasuku HAKETA, Hirokatsu ITO, Yu KUDO
  • Patent number: 11548877
    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: Grant
    Filed: May 22, 2020
    Date of Patent: January 10, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hirokatsu Ito, Tasuku Haketa, Yu Kudo, Yusuke Takahashi
  • Patent number: 11552251
    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: Grant
    Filed: February 13, 2017
    Date of Patent: January 10, 2023
    Assignee: 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: 20230006136
    Abstract: The compound represented by formula (1): wherein symbols are as defined in the description, provides an organic electroluminescence device having a device performance further improved.
    Type: Application
    Filed: September 23, 2020
    Publication date: January 5, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yusuke TAKAHASHI, Tasuku HAKETA, Hirokatsu ITO, Shota TANAKA, Yu KUDO
  • Publication number: 20220399505
    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: August 10, 2022
    Publication date: December 15, 2022
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yusuke TAKAHASHI, Tasuku HAKETA, Hirokatsu ITO, Yu KUDO
  • Patent number: RE49343
    Abstract: An organic electroluminescence device includes: a cathode; an anode; and an organic thin-film layer disposed between the cathode and the anode, the organic thin-film layer having one or more layers including an emitting layer, in which the emitting layer includes a first material represented by the following formula (1) and a second material in a form of a fluorescent dopant material.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: December 20, 2022
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Masahiro Kawamura, Hirokatsu Ito, Toshinari Ogiwara, Yumiko Mizuki