Patents by Inventor Takuma Yasuda

Takuma Yasuda 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).

  • Organic compound and photoelectric conversion element
    Patent number: 10629826
    Abstract: To provide an organic compound represented by the following general formula (1): where R1 is a C2-C6 alkyl group or a hydrogen atom, R2 and R3, which may be identical or different, are each a C2-C12 alkyl group, and R4 and R5, which may be identical or different, are each a C6-C12 alkyl group that may be a branched chain or a straight chain.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: April 21, 2020
    Assignees: RICOH COMPANY, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Ryota Arai, Takuma Yasuda, Yu Hidaka, Woong Shin
  • Dicyanopyrazine compound, luminescent material, luminescence device using the same, and method for producing 2,5-dicyano-3,6-dihalogenopyrazine
    Patent number: 10522763
    Abstract: A compound represented by formula (I) or formula (II): in formula (I), R3 represents an electron donating group, R4 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L3 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L4 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L3 and L4 may bond together to form a ring with the carbon atoms to which they are bonded, in formula (II), R5 represents an electron donating group, R6 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L5 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L6 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: December 31, 2019
    Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSIT CORPORATION, NIPPON SODA CO., LTD.
    Inventors: Takuma Yasuda, In Seob Park, Yu Seok Yang, Hiroshi Sumiya, Yukio Fukushima
  • Organic light-emitting device, host material, light-emitting material, and compound
    Patent number: 10497883
    Abstract: A high light emission efficiency can be achieved by the use of a compound represented by the general formula (1) as a host material or a light-emitting material of a light-emitting layer of an organic light-emitting device. X1 to X12 each independently represent C or BH constituting carborane, provided that among X1 to X12, the bonding positions to A and D each represent C, and the other thereof each represent BH; A represents an acceptor bonded to the carborane through an aromatic ring or a heteroaromatic ring; and D represents a donor bonded to the carborane through an aromatic ring or a heteroaromatic ring.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: December 3, 2019
    Assignee: KYULUX, INC.
    Inventors: Chihaya Adachi, Takuma Yasuda, Takuro Nishimoto, Sae Youn Lee
  • Dicyanopyrazine compound, luminescent material, luminescence device using the same, and method for producing 2,5-dicyano-3,6-dihalogenopyrazine
    Patent number: 10497878
    Abstract: A compound represented by formula (I) or formula (1I): in formula (I), R3 represents an electron donating group, R4 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L3 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L4 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L3 and L4 may bond together to form a ring with the carbon atoms to which they are bonded, in formula (II), R5 represents an electron donating group, R6 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L5 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L6 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: December 3, 2019
    Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NIPPON SODA CO., LTD.
    Inventors: Takuma Yasuda, In Seob Park, Yu Seok Yang, Hiroshi Sumiya, Yukio Fukushima
  • LIGHT-EMITTING MATERIAL, ORGANIC LIGHT-EMITTING DEVICE, AND COMPOUND
    Publication number: 20190345095
    Abstract: A compound represented by the general formula (11) is useful as a light-emitting material. R1, R2, R4 and R5 represent a group represented by the general formula (2), R11 to R20 represent a hydrogen atom or a substituent, and L12 represents a substituted or unsubstituted arylene group or a substituted or unsubstituted heteroarylene group.
    Type: Application
    Filed: July 23, 2019
    Publication date: November 14, 2019
    Inventors: Chihaya ADACHI, Takuma YASUDA, Ryosuke KONDO, Masaki NUMATA, Jun-Yun KIM, Inseob PARK
  • DICYANO N-HETEROCYCLIC COMPOUND, LIGHT-EMITTING MATERIAL, AND LIGHT-EMITTING ELEMENT IN WHICH SAME IS USED
    Publication number: 20190330162
    Abstract: Provided are: a dicyano N-heterocyclic compound represented by formula (I) (in the formula, R3 represents an electron-donating group, and n represents the number of repetitions of the content in brackets and is 0 or 1), the compound having exceptional heat resistance and light emission characteristics; a light-emitting material; and a light-emitting element in which the same is used.
    Type: Application
    Filed: January 9, 2018
    Publication date: October 31, 2019
    Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Nippon Soda Co., Ltd.
    Inventors: Takuma YASUDA, Ryuhei FURUE, Hiroyuki ISHIHARA, Yukio FUKUSHIMA
  • Dicyanopyrazine compound, luminescent material, luminescence device using the same, and method for producing 2,5-dicyano-3,6-dihalogenopyrazine
    Patent number: 10399960
    Abstract: A compound represented by formula (I) or formula (II): in formula (I), R3 represents an electron donating group, R4 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L3 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L4 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L3 and L4 may bond together to form a ring with the carbon atoms to which they are bonded, in formula (II), R5 represents an electron donating group, R6 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L5 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L6 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: September 3, 2019
    Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NIPPON SODA CO., LTD.
    Inventors: Takuma Yasuda, In Seob Park, Yu Seok Yang, Hiroshi Sumiya, Yukio Fukushima
  • ORGANIC LIGHT-EMITTING DEVICE, AND LIGHT-EMITTING MATERIAL AND COMPOUND USED THEREFOR
    Publication number: 20190252625
    Abstract: An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of R1 to R5 represents a hydrogen atom or a substituent.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 15, 2019
    Inventors: Chihaya ADACHI, Hiroki UOYAMA, Hiroko NOMURA, Kenichi GOUSHI, Takuma YASUDA, Ryosuke KONDO, Katsuyuki SHIZU, Hajime NAKANOTANI, Junichi NISHIDE
  • Light-emitting material, organic light-emitting device, and compound
    Patent number: 10381573
    Abstract: A compound represented by the general formula (1) is useful as a light-emitting material. In the general formula (1), from 0 to 1 of R3 to R5 represents a cyano group, from 1 to 5 of R1 to R5 represent a group represented by the general formula (2) etc., and the balance of R1 to R6 represent a hydrogen atom or a substituent other than above. R11 to R20 represent a hydrogen atom or a substituent, L12 represents a substituted or unsubstituted arylene group or a substituted or unsubstituted heteroarylene group.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: August 13, 2019
    Assignee: KYULUX, INC.
    Inventors: Chihaya Adachi, Takuma Yasuda, Ryosuke Kondo, Masaki Numata, Jun-Yun Kim, Inseob Park
  • DICYANOPYRAZINE COMPOUND, LUMINESCENT MATERIAL, LUMINESCENCE DEVICE USING THE SAME, AND METHOD FOR PRODUCING 2,5-DICYANO-3,6-DIHALOGENOPYRAZINE
    Publication number: 20190229274
    Abstract: A compound represented by formula (I) or formula (1I): in formula (I), R3 represents an electron donating group, R4 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L3 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L4 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L3 and L4 may bond together to form a ring with the carbon atoms to which they are bonded, in formula (II), R5 represents an electron donating group, R6 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L5 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L6 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group.
    Type: Application
    Filed: January 29, 2019
    Publication date: July 25, 2019
    Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NIPPON SODA CO., LTD.
    Inventors: Takuma YASUDA, In Seob PARK, Yu Seok YANG, Hiroshi SUMIYA, Yukio FUKUSHIMA
  • DICYANOPYRAZINE COMPOUND, LUMINESCENT MATERIAL, LUMINESCENCE DEVICE USING THE SAME, AND METHOD FOR PRODUCING 2,5-DICYANO-3,6-DIHALOGENOPYRAZINE
    Publication number: 20190169170
    Abstract: A compound represented by formula (I) or formula (II): in formula (I), R3 represents an electron donating group, R4 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L3 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L4 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L3 and L4 may bond together to form a ring with the carbon atoms to which they are bonded, in formula (II), R5 represents an electron donating group, R6 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L5 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L6 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group.
    Type: Application
    Filed: January 29, 2019
    Publication date: June 6, 2019
    Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NIPPON SODA CO., LTD.
    Inventors: Takuma YASUDA, In Seob PARK, Yu Seok YANG, Hiroshi SUMIYA, Yukio FUKUSHIMA
  • Organic light-emitting device, and light-emitting material and compound used therefor
    Patent number: 10276803
    Abstract: An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of R1 to R5 represents a hydrogen atom or a substituent.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: April 30, 2019
    Assignee: KYULUX, INC.
    Inventors: Chihaya Adachi, Hiroki Uoyama, Hiroko Nomura, Kenichi Goushi, Takuma Yasuda, Ryosuke Kondo, Katsuyuki Shizu, Hajime Nakanotani, Junichi Nishide
  • PHOSPHORUS-CONTAINING COMPOUND AND ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING THE SAME
    Publication number: 20180287090
    Abstract: A phosphorus-containing compound and an organic electroluminescence device including the same, the phosphorus-containing compound being represented by the following Formula 1:
    Type: Application
    Filed: December 12, 2017
    Publication date: October 4, 2018
    Inventors: Shuri SATO, Nobutaka AKASHI, Takuma YASUDA, Jiyoung LEE
  • DICYANOPYRAZINE COMPOUND, LUMINESCENT MATERIAL, LUMINESCENCE DEVICE USING THE SAME, AND METHOD FOR PRODUCING 2,5-DICYANO-3,6-DIHALOGENOPYRAZINE
    Publication number: 20180273513
    Abstract: A compound represented by formula (I) or formula (1I): in formula (I), R3 represents an electron donating group, R4 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L3 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L4 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L3 and L4 may bond together to form a ring with the carbon atoms to which they are bonded, in formula (II), R5 represents an electron donating group, R6 represents a hydrogen atom, a substituted or unsubstituted aryl group or an electron donating group, L5 represents a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group, L6 represents a single bond, a substituted or unsubstituted heteroarylene group or a substituted or unsubstituted arylene group.
    Type: Application
    Filed: November 8, 2016
    Publication date: September 27, 2018
    Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, NIPPON SODA CO., LTD.
    Inventors: Takuma YASUDA, In Seob PARK, Yu Seok YANG, Hiroshi SUMIYA, Yukio FUKUSHIMA
  • Organic material and photoelectric conversion element
    Patent number: 10062854
    Abstract: To provide an organic material represented by General Formula (1) below: where, in General Formula (1), R1 and R2 are each independently an alkyl group having from 2 through 8 carbon atoms, R3 and R4 are each independently a straight-chain alkyl group having 1, 2, 4, 6, or 12 carbon atoms, or a hydrogen atom, and n is an integer of 1 or 2.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: August 28, 2018
    Assignees: RICOH COMPANY, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Ryota Arai, Takuma Yasuda, Woong Shin, Hideaki Komiyama, Yu Hidaka, Takahiro To, Seiichi Furukawa
  • Compound having diazatriphenylene ring structure, and organic electroluminescent device
    Patent number: 10032995
    Abstract: A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The compound of a general formula (1) having a diazatriphenylene ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: July 24, 2018
    Assignee: Kyulux, Inc.
    Inventors: Chihaya Adachi, Takuma Yasuda, Katsuyuki Shizu, Takehiro Takahashi, Kazunori Togashi
  • POLYCYCLIC COMPOUND AND ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING THE SAME
    Publication number: 20170352817
    Abstract: A polycyclic compound and an organic electroluminescence device including the same. The polycyclic compound according to an example embodiment is represented by the following Formula 1. wherein in Formula 1, Cy1 is carbonyl-containing five- or six-membered and substituted or unsubstituted cyclic hydrocarbon or substituted or unsubstituted heterocycle, and R1 to R4 are each independently a hydrogen atom or a group represented by the following Formula 2 or 3.
    Type: Application
    Filed: March 30, 2017
    Publication date: December 7, 2017
    Inventors: Hiromi NAKANO, Shuri SATO, Yoshimasa FUJITA, Nobutaka AKASHI, Takuma YASUDA, JiYoung LEE
  • NITROGEN-CONTAINING COMPOUND AND ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING THE SAME
    Publication number: 20170346017
    Abstract: A nitrogen-containing compound and an organic electroluminescence device including the same, the nitrogen-containing compound being represented by the following Formula 1:
    Type: Application
    Filed: December 14, 2016
    Publication date: November 30, 2017
    Inventors: Hiromi NAKANO, Shuri SATO, Yoshimasa FUJITA, Nobutaka AKASHI, Takuma YASUDA, Inseob PARK
  • ORGANIC MATERIAL AND PHOTOELECTRIC CONVERSION ELEMENT
    Publication number: 20170338424
    Abstract: To provide an organic material represented by General Formula (1) below: where, in General Formula (1), R1 and R2 are each independently an alkyl group having from 2 through 8 carbon atoms, R3 and R4 are each independently a straight-chain alkyl group having 1, 2, 4, 6, or 12 carbon atoms, or a hydrogen atom, and n is an integer of 1 or 2.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 23, 2017
    Applicants: RICOH COMPANY, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Ryota ARAI, Takuma YASUDA, Woong SHIN, Hideaki KOMIYAMA, Yu HIDAKA, Takahiro TO, Seiichi FURUKAWA
  • ORGANIC LIGHT-EMITTING DEVICE, AND LIGHT-EMITTING MATERIAL AND COMPOUND USED THEREFOR
    Publication number: 20170256720
    Abstract: An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of R1 to R5 represents a hydrogen atom or a substituent.
    Type: Application
    Filed: October 14, 2016
    Publication date: September 7, 2017
    Inventors: Chihaya ADACHI, Hiroki UOYAMA, Hiroko NOMURA, Kenichi GOUSHI, Takuma YASUDA, Ryosuke KONDO, Katsuyuki SHIZU, Hajime NAKANOTANI, Jyunichi NISHIDE