Patents by Inventor Keita Seda

Keita Seda 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: 20250253333
    Abstract: Provided are: a modified sulfide solid electrolyte containing a sulfide solid electrolyte having a BET specific surface area of 10 m2/g or more and containing a lithium atom, a sulfur atom, a phosphorus atom, and a halogen atom, and a compound having two or more heterocyclic rings each having a carbon atom and an oxygen atom; and a method for producing the modified sulfide solid electrolyte, which has excellent coating suitability when coated as a paste and is capable of efficiently exhibiting excellent battery performance even when a sulfide solid electrolyte having a large specific surface area is used. Also provided are an electrode combined material and a lithium-ion battery using the modified sulfide solid electrolyte.
    Type: Application
    Filed: March 28, 2023
    Publication date: August 7, 2025
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Keita SEDA, Tomoyuki OKUYAMA, Takamoto MORITA
  • Patent number: 12262634
    Abstract: An organic electroluminescence device comprising: a cathode, an anode, and at least one organic layer disposed between the cathode and the anode, wherein at least one layer of the at least one organic layer comprises a compound represented by the following formulas (1-1) and (1-3) or a compound represented by the following formulas (1-2) and (1-3).
    Type: Grant
    Filed: December 12, 2022
    Date of Patent: March 25, 2025
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota Takahashi, Hidetsugu Ikeda, Keita Seda, Yuki Nakano
  • Patent number: 12232419
    Abstract: A compound represented by the following formula (1): wherein in the formula (1), rings X1 to X4 independently a substituted or unsubstituted benzene ring, or a substituted or unsubstituted 6-membered aromatic heterocyclic ring having one or two nitrogen atoms, and at least two of the rings X1 to X4 are independently fused with one or more selected from the group consisting of a substituted or unsubstituted hydrocarbon ring including 5 to 50 ring carbon atoms, and a substituted or unsubstituted heterocyclic ring including 5 to 50 ring atoms.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: February 18, 2025
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota Takahashi, Keita Seda, Shota Sawano
  • Patent number: 12146087
    Abstract: A compound represented by the following formula (1), wherein in the formula (1), at least one of R1 to R8 is a group represented by the following formula (2).
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: November 19, 2024
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Keita Seda, Ryota Takahashi, Hidetsugu Ikeda, Yuki Nakano, Thomas Schaefer, Peter Murer, Carsten Rothe
  • Patent number: 12108666
    Abstract: A compound having a structure represented by the following formulas (a) and (b): wherein, in the formulas (a) and (b), a ring A, a ring B, a ring C and a ring D are independently a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic ring having 5 to 50 ring atoms; two or more of the ring A, the ring B, the ring C and the ring D are a heterocyclic ring; and each of sites *a, *b, *c and *d in the formula (a) and the formula (b) represents a position of an atom, and the atoms located in the sites *a, *b,*c and *d form one substituted or unsubstituted and saturated or unsaturated six-membered ring including four atoms thereof.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: October 1, 2024
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota Takahashi, Hidetsugu Ikeda, Yuki Nakano, Keita Seda
  • Patent number: 11950498
    Abstract: This compound is represented by formula (1)
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: April 2, 2024
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota Takahashi, Keita Seda, Yuki Nakano
  • Publication number: 20230301176
    Abstract: Provided are a compound that further improves the performance of an organic EL device, the organic electroluminescence device with more improved device performance, and electronic device including such an organic electroluminescence device, in which the compound is represented by the following formula (1): (each symbol in the formula (1) is as defined in the specification), the organic electroluminescence device contains the compound, and the electronic device includes the organic electroluminescence device.
    Type: Application
    Filed: October 28, 2022
    Publication date: September 21, 2023
    Applicants: IDEMITSU KOSAN CO.,LTD., National University Corporation Tokai National Higher Education and Research System
    Inventors: Tsukasa SAWATO, Keita SEDA, Tasuku HAKETA, Yusuke TAKAHASHI, Shota TANAKA, Takuto FUKAMI, Hideto ITO, Kenichiro ITAMI
  • Publication number: 20230128708
    Abstract: An organic electroluminescence device comprising: a cathode, an anode, and at least one organic layer disposed between the cathode and the anode, wherein at least one layer of the at least one organic layer comprises a compound represented by the following formulas (1-1) and (1-3) or a compound represented by the following formulas (1-2) and (1-3).
    Type: Application
    Filed: December 12, 2022
    Publication date: April 27, 2023
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota TAKAHASHI, Hidetsugu IKEDA, Keita SEDA, Yuki NAKANO
  • Publication number: 20230085328
    Abstract: A compound represented by the following formula (1A) or (1B): (the symbols in the formulae (1A) and (1B) have the same meaning as defined in the specification), an organic electroluminescent device containing the compound, and an electronic device including the organic electroluminescent device.
    Type: Application
    Filed: July 7, 2022
    Publication date: March 16, 2023
    Applicants: IDEMITSU KOSAN CO.,LTD., National University Corporation Tokai National Higher Education and Research System
    Inventors: Masato MITANI, Keita SEDA, Taro YAMAKI, Shota TANAKA, Tsukasa SAWATO, Masatoshi SAITO, Hiroaki ITOI, Tasuku HAKETA, Kei YOSHIDA, Sayaka MIZUTANI, Kenichiro ITAMI, Kei MURAKAMI, Satoshi MATSUBARA, Yoshito KOGA
  • Patent number: 11569449
    Abstract: An organic electroluminescence device comprising: a cathode, an anode, and at least one organic layer disposed between the cathode and the anode, wherein at least one layer of the at least one organic layer comprises a compound represented by the following formulas (1-1) and (1-3) or a compound represented by the following formulas (1-2) and (1-3).
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: January 31, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota Takahashi, Hidetsugu Ikeda, Keita Seda, Yuki Nakano
  • Patent number: 11557730
    Abstract: An organic electroluminescence device comprising: a cathode, an anode, and at least one organic layer disposed between the cathode and the anode, wherein at least one layer of the at least one organic layer comprises a compound represented by the following formulas (1-1) and (1-3) or a compound represented by the following formulas (1-2) and (1-3).
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: January 17, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Ryota Takahashi, Hidetsugu Ikeda, Keita Seda, Yuki Nakano
  • Publication number: 20220363638
    Abstract: A compound is represented by a formula (2) below and has at least one group represented by a formula (20) below. In the formula (2): m is 0, 1, 2, or 3, n is 0, 1, 2 or 3, and m+n is an integer of 1 or more.
    Type: Application
    Filed: September 24, 2020
    Publication date: November 17, 2022
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Keita SEDA, Ryota TAKAHASHI, Yuki NAKANO, Yuichiro KAWAMURA, Fabrice ECKES
  • Patent number: 11342512
    Abstract: A compound represented by the following formula (1), wherein one or more pairs among R12 and R13, R13 and R14, R14 and R15, R16 and R17, R17 and R18, and R18 and R19 independently form a ring represented by the following formula (2A) or a ring represented by the following formula (2B), or do not form a ring represented by the following formula (2A) and do not form a ring represented by the following formula (2B); and one of R12 to R28 is bonded with L2.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: May 24, 2022
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yuki Nakano, Ryota Takahashi, Keita Seda, Tomoki Kato, Hidetsugu Ikeda, Thomas Schaefer, Peter Murer, Carsten Rothe
  • Publication number: 20220020925
    Abstract: A compound represented by the following formula (1), wherein one or more pairs among R12 and R13, R13 and R14, R14 and R15, R16 and R17, R17 and R18, and R18 and R19 independently form a ring represented by the following formula (2A) or a ring represented by the following formula (2B), or do not form a ring represented by the following formula (2A) and do not form a ring represented by the following formula (2B); and one of R12 to R28 is bonded with L2.
    Type: Application
    Filed: September 7, 2021
    Publication date: January 20, 2022
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yuki NAKANO, Ryota TAKAHASHI, Keita SEDA, Tomoki KATO, Hidetsugu IKEDA, Thomas SCHAEFER, Peter MURER, Carsten ROTHE
  • Publication number: 20210395233
    Abstract: A compound having a structure represented by the following formulas (a) and (b): wherein, in the formulas (a) and (b), a ring A, a ring B, a ring C and a ring D are independently a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heterocyclic ring having 5 to 50 ring atoms; two or more of the ring A, the ring B, the ring C and the ring D are a heterocyclic ring; and each of sites *a, *b, *c and *d in the formula (a) and the formula (b) represents a position of an atom, and the atoms located in the sites *a, *b, *c and *d form one substituted or unsubstituted and saturated or unsaturated six-membered ring including four atoms thereof.
    Type: Application
    Filed: September 26, 2019
    Publication date: December 23, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Ryota TAKAHASHI, Hidetsugu IKEDA, Yuki NAKANO, Keita SEDA
  • Publication number: 20210384430
    Abstract: An organic electroluminescence device including a cathode, an anode, and an emitting layer disposed between the cathode and the anode, wherein the emitting layer contains a compound represented by the following formula (1) and one or more compounds selected from the group consisting of a compound represented by formula (11), a compound represented by formula (21), a compound represented by formula (31), a compound represented by formula (41), a compound represented by formula (51), a compound represented by formula (61), a compound represented by formula (71) and a compound represented by formula (81). In the formula (1), at least one of R1 to R8 is a deuterium atom.
    Type: Application
    Filed: October 3, 2019
    Publication date: December 9, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yuki NAKANO, Taro YAMAKI, Satomi TASAKI, Tomoki KATO, Keita SEDA, Ryota TAKAHASHI
  • Publication number: 20210359221
    Abstract: A compound represented by the following formula (1): wherein in the formula (1), rings X1 to X4 independently a substituted or unsubstituted benzene ring, or a substituted or unsubstituted 6-membered aromatic heterocyclic ring having one or two nitrogen atoms, and at least two of the rings X1 to X4 are independently fused with one or more selected from the group consisting of a substituted or unsubstituted hydrocarbon ring including 5 to 50 ring carbon atoms, and a substituted or unsubstituted heterocyclic ring including 5 to 50 ring atoms.
    Type: Application
    Filed: February 24, 2021
    Publication date: November 18, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Ryota TAKAHASHI, Keita SEDA, Shota SAWANO
  • Patent number: 11139437
    Abstract: A compound represented by the formula (1) below. At least one set of two or more adjacent groups among R1 to R11 forms a substituted or unsubstituted heterocyclic ring, or forms a ring represented by the formula (2) below, or at least one of R1 to R4 is a group represented by the formula (3) below.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: October 5, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Keita Seda, Ryota Takahashi, Tomoki Kato, Hidetsugu Ikeda, Yuki Nakano
  • Publication number: 20210151687
    Abstract: This compound is represented by formula (1).
    Type: Application
    Filed: June 22, 2018
    Publication date: May 20, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Ryota TAKAHASHI, Keita SEDA, Yuki NAKANO
  • Publication number: 20210062078
    Abstract: A compound represented by the following formula (1), wherein in the formula (1), at least one of R1 to R8 is a group represented by the following formula (2).
    Type: Application
    Filed: December 28, 2018
    Publication date: March 4, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Tomoki KATO, Keita SEDA, Ryota TAKAHASHI, Hidetsugu IKEDA, Yuki NAKANO, Thomas SCHAEFER, Peter MURER, Carsten ROTHE