Patents by Inventor Kei Yoshida

Kei Yoshida 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: 20210359217
    Abstract: A compound of the following formula (1) and others. R1 to R24, R31 to R35, A1 and A2 are as defined in the specification, n is an integer of 0 to 3, when A1 is an (n+1)-valent residue of benzene, n is an integer of 1 or more, and when n is 0, (A2)0 is a hydrogen atom.
    Type: Application
    Filed: September 2, 2019
    Publication date: November 18, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Kei YOSHIDA, Masatoshi SAITO, Ryoji MAEDA, Masato NAKAMURA, Tetsuya MASUDA
  • Publication number: 20210230135
    Abstract: A compound represented by Formula (1): The compound can be used as insecticides.
    Type: Application
    Filed: March 22, 2021
    Publication date: July 29, 2021
    Inventors: Kei Yoshida, Takeo Wakita, Hiroyuki Katsuta, Akiyoshi Kai, Yutaka Chiba, Kiyoshi Takahashi, Hiroko Kato, Nobuyuki Kawahara, Michikazu Nomura, Hidenori Daido, Junji Maki, Shinichi Banba
  • Patent number: 11059781
    Abstract: A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D1 and D2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D1 and D2 being optionally mutually the same or different.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: July 13, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Satomi Tasaki, Masahiro Kawamura, Toshinari Ogiwara, Hitoshi Kuma, Kei Yoshida, Keiji Okinaka
  • Patent number: 11043638
    Abstract: An organic electroluminescence device includes an anode, an emitting layer and a cathode, in which the emitting layer includes a first compound and a second compound. The first compound is a delayed-fluorescent compound. The second compound is represented by a formula (2) below, in which X is a nitrogen atom or a carbon atom bonded to Y; R21 to R26 are each independently a hydrogen atom or a substituent; Z21 and Z22 are each independently selected from the group consisting of a halogen atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, and a substituted or unsubstituted aryloxy group.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: June 22, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Toshinari Ogiwara, Kei Yoshida, Yuichiro Kawamura
  • Patent number: 10995081
    Abstract: A compound represented by Formula (1): The compound can be used as insecticides.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: May 4, 2021
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kei Yoshida, Takeo Wakita, Hiroyuki Katsuta, Akiyoshi Kai, Yutaka Chiba, Kiyoshi Takahashi, Hiroko Kato, Nobuyuki Kawahara, Michikazu Nomura, Hidenori Daido, Junji Maki, Shinichi Banba
  • Publication number: 20210104680
    Abstract: An organic electroluminescence device includes an anode, an emitting layer and a cathode, in which the emitting layer includes a first compound, a second compound and a third compound. The first compound is a compound represented by a formula (1) below. The second compound has a larger singlet energy than a singlet energy of the first compound. The third compound is a fluorescent compound.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 8, 2021
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Toshinari OGIWARA, Kei YOSHIDA, Satomi TASAKI
  • Publication number: 20210098707
    Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode, in which the emitting layer contains a first compound represented by a formula (1) and a fluorescent second compound. A singlet energy S1(M1) of the first compound is larger than a singlet energy S1(FL) of the fluorescent second compound. A is a group represented by a formula (1b).
    Type: Application
    Filed: March 22, 2018
    Publication date: April 1, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Kei YOSHIDA, Masatoshi SAITO, Toshinari OGIWARA, Kei YOSHIZAKI, Yuichiro KAWAMURA
  • Patent number: 10910565
    Abstract: An organic electroluminescence device includes an anode, an emitting layer and a cathode, in which the emitting layer includes a first compound, a second compound and a third compound. The first compound is a compound represented by a formula (1) below. The second compound has a larger singlet energy than a singlet energy of the first compound. The third compound is a fluorescent compound.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: February 2, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Toshinari Ogiwara, Kei Yoshida, Satomi Tasaki
  • Publication number: 20210024540
    Abstract: A compound having anticancer activity, or a pharmaceutically acceptable salt thereof is provided. Used is a compound represented by the following formula (I) or a pharmaceutically acceptable salt thereof: (wherein, L1 and L2 are the same or different and each represents a group represented by one formula selected from the group consisting of formulas (A) to (F), and S represents a group represented by one formula selected from the group consisting of formulas (S1) to (S18)).
    Type: Application
    Filed: March 29, 2019
    Publication date: January 28, 2021
    Applicant: KYOWA KIRIN CO., LTD.
    Inventors: Kenji UCHIDA, Ryohei KAWAI, Keisuke YAMAMOTO, Toshimi KANAI, Hideo IKOTA, Takashi IMAEDA, Kei YOSHIDA
  • Publication number: 20210020846
    Abstract: An organic electroluminescence device includes an anode, a first organic layer, and a cathode in this order. The first organic layer contains a first compound, a second compound, and a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded to Y, Y being a hydrogen atom or a substituent. In the formula (3), n is 1 to 4, XB is a group represented by a formula (3A). In the formula (3A), Ar1 and Ar2 are each independently a monovalent or polyvalent aromatic hydrocarbon group, and Cz is a group represented by a formula (3B-1) and the like.
    Type: Application
    Filed: March 18, 2019
    Publication date: January 21, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Kei YOSHIZAKI, Toshinari OGIWARA, Yuichiro KAWAMURA, Keiichi YASUKAWA, Kei YOSHIDA
  • Publication number: 20210009527
    Abstract: A compound represented by the following formula (1), wherein X1 is O or S, and two or more of Y1, Y2 and Y3 are N, provided that the case where one or both of —Ar1—Ar2 and —Ar3—Ar4 is a p-terphenyl-3-yl group is excluded.
    Type: Application
    Filed: February 20, 2019
    Publication date: January 14, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yoshinao SHIRASAKI, Tetsuya MASUDA, Takushi SHIOMI, Masatoshi SAITO, Kei YOSHIDA, Masato NAKAMURA
  • Publication number: 20200407315
    Abstract: A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D1 and D2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D1 and D2 being optionally mutually the same or different.
    Type: Application
    Filed: September 9, 2020
    Publication date: December 31, 2020
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Satomi TASAKI, Masahiro KAWAMURA, Toshinari OGIWARA, Hitoshi KUMA, Kei YOSHIDA, Keiji OKINAKA
  • Publication number: 20200395552
    Abstract: An organic electroluminescence device includes: an anode; an emitting layer; and a cathode, the emitting layer containing a first material, a second material and a third material, the first material being a fluorescent material, the second material being a delayed fluorescent material, the third material having a singlet energy larger than a singlet energy of the second material.
    Type: Application
    Filed: September 1, 2020
    Publication date: December 17, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Toshinari OGIWARA, Kei YOSHIDA, Ryohei HASHIMOTO, Yumiko MIZUKI
  • Patent number: 10851055
    Abstract: A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D1 and D2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D1 and D2 being optionally mutually the same or different.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: December 1, 2020
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Satomi Tasaki, Masahiro Kawamura, Toshinari Ogiwara, Hitoshi Kuma, Kei Yoshida, Keiji Okinaka
  • Publication number: 20200358000
    Abstract: A compound is represented by a formula (2) below.
    Type: Application
    Filed: October 3, 2017
    Publication date: November 12, 2020
    Inventors: Masatoshi SAITO, Kei Yoshida, Yuichiro Kawamura, Toshinari Ogiwara, Kei Yoshizaki
  • Patent number: 10811616
    Abstract: An organic electroluminescence device includes: an anode; an emitting layer; and a cathode, the emitting layer containing a first material, a second material and a third material, the first material being a fluorescent material, the second material being a delayed fluorescent material, the third material having a singlet energy larger than a singlet energy of the second material.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: October 20, 2020
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Toshinari Ogiwara, Kei Yoshida, Ryohei Hashimoto, Yumiko Mizuki
  • Publication number: 20200148639
    Abstract: A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D1 and D2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D1 and D2 being optionally mutually the same or different.
    Type: Application
    Filed: January 10, 2020
    Publication date: May 14, 2020
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Satomi Tasaki, Masahiro Kawamura, Toshinari Ogiwara, Hitoshi Kuma, Kei Yoshida, Keiji Okinaka
  • Patent number: 10651398
    Abstract: An organic electroluminescence device includes an anode, a cathode, a first organic layer interposed between the anode and the cathode, a second organic layer interposed between the first organic layer and the cathode, and a bipolar layer interposed between the first organic layer and the second organic layer and having bipolar characteristics, in which at least one of the first organic layer and the second organic layer includes the first compound and the second compound, the first compound exhibits delayed fluorescence, and an energy gap T77K(M2) at 77[K] of the second compound is larger than an energy gap T77K(M1) at 77[K] of the first compound.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: May 12, 2020
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Toshinari Ogiwara, Kei Yoshida
  • Patent number: 10590080
    Abstract: A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D1 and D2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D1 and D2 being optionally mutually the same or different.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: March 17, 2020
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Satomi Tasaki, Masahiro Kawamura, Toshinari Ogiwara, Hitoshi Kuma, Kei Yoshida, Keiji Okinaka
  • Patent number: 10547009
    Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode, the emitting layer including a delayed-fluorescent first compound represented by a formula (1), and a fluorescent second compound. In the formula (1), Ar1 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the like, and ArEWG is a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms and including one or more nitrogen atom in the ring, or an aryl group having 6 to 30 ring carbon atoms and substituted by one or more cyano group, at least one of Ar1 and ArX being at least one group selected from the group consisting of groups represented by a formula (1a) and the like.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: January 28, 2020
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Kei Yoshida, Ryohei Hashimoto, Toshinari Ogiwara, Yuichiro Kawamura, Masatoshi Saito