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).

  • Publication number: 20240355512
    Abstract: A resistive paste according to the present disclosure includes metal particles, insulating particles, glass particles, and a metal silicide. The metal particles include copper and nickel. The insulating particles include at least one of alumina, zirconia, zinc oxide, or boron nitride. A chip resistor according to the present disclosure includes a resistive element and a substrate. The resistive element includes the resistive paste as a material and is disposed on the substrate.
    Type: Application
    Filed: August 10, 2022
    Publication date: October 24, 2024
    Inventors: Yuki AOIKE, Hirokatsu ITO, Kenichi MATSUSHIMA, Shogo NAKAYAMA, Tomohiro FUJITA, Takashi OHBAYASHI
  • Publication number: 20240306490
    Abstract: Compounds of formulae (2-7) or (2-9) are provided: Also provided are organic electroluminescence (EL) devices containing the compounds 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 25, 2024
    Publication date: September 12, 2024
    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
  • Patent number: 12069943
    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: Grant
    Filed: December 3, 2019
    Date of Patent: August 20, 2024
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tasuku Haketa, Hirokatsu Ito, Yu Kudo
  • Patent number: 12048242
    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: May 29, 2020
    Date of Patent: July 23, 2024
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yusuke Takahashi, Tasuku Haketa, Hirokatsu Ito, Yu Kudo
  • Patent number: 12022728
    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: April 29, 2022
    Date of Patent: June 25, 2024
    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: 20240166592
    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: December 19, 2023
    Publication date: May 23, 2024
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Tomoki KATO, Taro YAMAKI, Masahiro KAWAMURA, Hirokatsu ITO
  • Publication number: 20240161948
    Abstract: A chip resistor includes: a resistor body; and a protective coating that covers the resistor body. The protective coating is a cured product of a coating agent containing a polyfunctional epoxy resin, a curing agent, an inorganic filler, and silicone rubber particles. The coating agent contains: silica as the inorganic filler at a content equal to or greater than 60% by weight and equal to or less than 90% by weight; and the silicone rubber particles at a content equal to or greater than 1% by weight and equal to or less than 15% by weight.
    Type: Application
    Filed: December 6, 2021
    Publication date: May 16, 2024
    Inventors: Takashi OHBAYASHI, Junko ONOZAKI, Hirokatsu ITO, Kyousuke ISONO
  • 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