Patents by Inventor Keiro Nasu

Keiro Nasu 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).

  • Composition of matter for use in organic light- emitting diodes
    Patent number: 11849634
    Abstract: The present disclosure relates to compounds of Formula (I)-(V) as compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: December 19, 2023
    Assignee: KYULUX, INC.
    Inventors: Jorge Aguilera-Iparraguirre, Rafael Gomez-Bombarelli, Timothy D Hirzel, Yoshitake Suzuki, Yu Seok Yang, Shuo-Hsien Cheng, Naoto Notsuka, Hayato Kakizoe, Ayataka Endo, Keiro Nasu, Minki Hong
  • Light-emitting material, compound, and organic light-emitting element
    Patent number: 11637244
    Abstract: A compound represented by the following general formula is excellent in light emission properties. R1 and R2 each independently represent a fluorinated alkyl group, D represents a substituent in which Hammett's ?p value is negative, and A represents a substituent in which Hammett's ?p value is positive.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 25, 2023
    Assignees: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, KYULUX, INC.
    Inventors: Yan Geng, Chihaya Adachi, Hajime Nakanotani, Naoto Notsuka, Keiro Nasu
  • Composition of matter for use in organic light-emitting diodes
    Patent number: 11638390
    Abstract: The present disclosure relates in part to compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: April 25, 2023
    Assignee: KYULUX, INC.
    Inventors: Jorge Aguilera-Iparraguirre, Rafael Gomez-Bombarelli, Timothy D Hirzel, Shuo-Hsien Cheng, Yu Seok Yang, Naoto Notsuka, Yoshitake Suzuki, Ayataka Endo, Keiro Nasu, Tsang Ping Kuen
  • Composition of matter for use in organic light-emitting diodes
    Patent number: 11584739
    Abstract: The present disclosure relates in parts to compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: February 21, 2023
    Assignee: KYULUX, INC.
    Inventors: Jorge Aguilera-Iparraguirre, Rafael Gomez-Bombarelli, Timothy D Hirzel, Yoshitake Suzuki, Shuo-Hsien Cheng, Yu Seok Yang, Naoto Notsuka, Ayataka Endo, Keiro Nasu, Tsang Ping Kuen
  • Composition of matter for use in organic light-emitting diodes
    Patent number: 11555034
    Abstract: The present disclosure relates to compounds capable of emitting delayed fluorescence, and uses of these compounds in organic light-emitting diodes.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: January 17, 2023
    Assignee: KYULUX, INC.
    Inventors: Jorge Aguilera-Iparraguirre, Rafael Gomez-Bombarelli, Timothy D Hirzel, Naoto Notsuka, Yoshitake Suzuki, Yu Seok Yang, Shuo-Hsien Cheng, Ayataka Endo, Keiro Nasu, Tsang Ping Kuen
  • Organic light-emitting device
    Patent number: 11335872
    Abstract: An organic light emitting device having an exciton generation layer that contains a compound having a difference between the lowest excited singlet energy level ES1 and the lowest excited triplet energy level ET1 thereof of 0.3 eV or less, or an exciplex to emit delayed fluorescence, and a light emitting layer that contains a light emitting material has a high efficiency and a long lifetime.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 17, 2022
    Assignee: KYULUX, INC.
    Inventors: Junji Adachi, Ayataka Endo, Ping Kuen Daniel Tsang, Hidetoshi Fujimura, Kiyomasa Sueishi, Asuka Yoshizaki, Keiro Nasu
  • Composition of matter for use in organic light-emitting diodes
    Patent number: 11283027
    Abstract: The present disclosure relates to compounds of formula (I) as compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: March 22, 2022
    Assignee: Kyulux, Inc.
    Inventors: Yoshitake Suzuki, Yu Seok Yang, Shuo-Hsien Cheng, Naoto Notsuka, Ayataka Endo, Keiro Nasu, Tsang Ping Kuen Daniel, Jorge Aguilera-Iparraguirre, Rafael Gomez-Bombarelli, Timothy D. Hirzel
  • ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20210234113
    Abstract: An organic light emitting device having an exciton generation layer that contains a compound having a difference between the lowest excited singlet energy level ES1 and the lowest excited triplet energy level ET1 thereof of 0.3 eV or less, or an exciplex to emit delayed fluorescence, and a light emitting layer that contains a light emitting material has a high efficiency and a long lifetime.
    Type: Application
    Filed: September 6, 2017
    Publication date: July 29, 2021
    Inventors: Junji ADACHI, Ayataka ENDO, Ping Kuen Daniel TSANG, Hidetoshi FUJIMURA, Kiyomasa SUEISHI, Asuka YOSHIZAKI, Keiro NASU
  • Compound, light-emitting material, and organic light-emitting device
    Patent number: 11038118
    Abstract: A compound having a structure represented by the following general formula emits delayed fluorescent light and is useful as a light-emitting material. Three or more of R1, R2, R4, and R5 each represent a 9-carbazolyl group, a 10-phenoxazyl group, or a 10-phenothiazyl group, and the balance thereof and R3 each represent a hydrogen atom or a substituent, but exclude a cyano group. R3 excludes an aryl group, a heteroaryl group, and an alkynyl group.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: June 15, 2021
    Assignees: KYULUX, INC., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Keiro Nasu, Chihaya Adachi, Hajime Nakanotani, Hiroko Nomura
  • CHARGE TRANSPORT MATERIAL, COMPOUND, AND ORGANIC LIGHT-EMITTING ELEMENT
    Publication number: 20200399246
    Abstract: A charge transport material containing a compound represented by the following formula (1). R1 and R2 each are a fluoroalkyl group, Ar1 and Ar2 each are an aromatic ring, A1 and A2 each are an aryl group substituted with a group having a positive Hammett ?p value or with a phenyl group, or are a substituted or unsubstituted heteroaryl group bonding to Ar1 or Ar2 via a carbon atom, n1 and n2 each are a natural number.
    Type: Application
    Filed: March 13, 2019
    Publication date: December 24, 2020
    Inventors: Linsong CUI, Chihaya ADACHI, Keiro NASU, Ayataka ENDO, Shuo-Hsien CHENG, YuSeok YANG, Hiroko NOMURA
  • COMPOSITION OF MATTER FOR USE IN ORGANIC LIGHT-EMITTING DIODES
    Publication number: 20200203622
    Abstract: The present disclosure relates to compounds of Formula (I)-(V) as compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Application
    Filed: August 31, 2018
    Publication date: June 25, 2020
    Inventors: Jorge AGUILERA-IPARRAGUIRRE, Rafael GOMEZ-BOMBARELLI, Timothy D HIRZEL, Yoshitake SUZUKI, Yu Seok YANG, Shuo-Hsien CHENG, Naoto NOTSUKA, Hayato KAKIZOE, Ayataka ENDO, Keiro NASU, Minki HONG
  • COMPOSITION OF MATTER FOR USE IN ORGANIC LIGHT-EMITTING DIODES
    Publication number: 20200115364
    Abstract: The present disclosure relates in parts to compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Application
    Filed: June 25, 2018
    Publication date: April 16, 2020
    Inventors: Jorge AGUILERA-IPARRAGUIRRE, Rafael GOMEZ-BOMBARELLI, Timothy D HIRZEL, Yoshitake SUZUKI, Shuo-Hsien CHENG, Yu Seok YANG, Naoto NOTSUKA, Ayataka ENDO, Keiro NASU, Tsang Ping KUEN
  • COMPOSITION OF MATTER FOR USE IN ORGANIC LIGHT-EMITTING DIODES
    Publication number: 20200119287
    Abstract: The present disclosure relates in part to compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.
    Type: Application
    Filed: June 25, 2018
    Publication date: April 16, 2020
    Inventors: Jorge AGUILERA-IPARRAGUIRRE, Rafael GOMEZ-BOMBARELLI, Timothy D HIRZEL, Shuo-Hsien CHENG, Yu Seok YANG, Naoto NOTSUKA, Yoshitake SUZUKI, Ayataka ENDO, Keiro NASU, Tsang Ping KUEN
  • COMPOSITION OF MATTER FOR USE IN ORGANIC LIGHT-EMITTING DIODES
    Publication number: 20200115376
    Abstract: The present disclosure relates to compounds capable of emitting delayed fluorescence, and uses of these compounds in organic light-emitting diodes.
    Type: Application
    Filed: June 25, 2018
    Publication date: April 16, 2020
    Inventors: Jorge AGUILERA-IPARRAGUIRRE, Rafael GOMEZ-BOMBARELLI, Timothy D HIRZEL, Naoto NOTSUKA, Yoshitake SUZUKI, Yu Seok YANG, Shuo-Hsien CHENG, Ayataka ENDO, Keiro NASU, Tsang Ping KUEN
  • Compound, light-emitting material, and organic light-emitting device
    Patent number: 10510977
    Abstract: A compound having a structure represented by the following general formula emits delayed fluorescent light, and is useful as a light-emitting material. One or more of R1, R2, R3, R4, and R5 represent a 9-carbazolyl group having a substituent at at least one of 1-position and 8-position, or a 10-phenoxazyl group or 10-phenothiazyl group having a substituent at at least one of 1-position and 9-position. The balance thereof represents a hydrogen atom or a substituent.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: December 17, 2019
    Assignees: KYULUX, INC., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Keiro Nasu, Chihaya Adachi, Hajime Nakanotani, YuSeok Yang, Hiroko Nomura
  • LIGHT-EMITTING MATERIAL, COMPOUND, AND ORGANIC LIGHT-EMITTING ELEMENT
    Publication number: 20190348611
    Abstract: A compound represented by the following general formula is excellent in light emission properties. R1 and R2 each independently represent a fluorinated alkyl group, D represents a substituent in which Hammett's ?p value is negative, and A represents a substituent in which Hammett's ?p value is positive.
    Type: Application
    Filed: December 21, 2017
    Publication date: November 14, 2019
    Inventors: Yan GENG, Chihaya ADACHI, Hajime NAKANOTANI, Naoto NOTSUKA, Keiro NASU
  • CHARGE TRANSPORT MATERIAL, COMPOUND, DELAYED FLUORESCENT MATERIAL AND ORGANIC LIGHT EMITTING ELEMENT
    Publication number: 20190221749
    Abstract: A compound represented by the following general formula (1) is useful as a charge transport material and others in organic light emitting materials. Ar1 to Ar3 each represents an aryl group or a heteroaryl group and at least one of Ar1 to Ar3 contains a skeleton represented by the following general formula (2). In the general formula (2), X represents O or S. R1 to R8 each represent a hydrogen atom, a substituent or a bonding position.
    Type: Application
    Filed: August 18, 2017
    Publication date: July 18, 2019
    Inventors: YuSeok YANG, Keiro NASU, Asuka YOSHIZAKI, Ping Kuen Daniel TSANG, Ayataka ENDO, Hiroko NOMURA, Hidetoshi FUJIMURA, Naoto NOTSUKA
  • COMPOUND, LIGHT-EMITTING MATERIAL, AND ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20190016704
    Abstract: A compound having a structure represented by the following general formula emits delayed fluorescent light, and is useful as a light-emitting material. One or more of R1, R2, R3, R4, and R5 represent a 9-carbazolyl group having a substituent at at least one of 1-position and 8-position, or a 10-phenoxazyl group or 10-phenothiazyl group having a substituent at at least one of 1-position and 9-position. The balance thereof represents a hydrogen atom or a substituent.
    Type: Application
    Filed: December 28, 2016
    Publication date: January 17, 2019
    Inventors: Keiro NASU, Chihaya ADACHI, Hajime NAKANOTANI, YuSeok YANG, Hiroko NOMURA
  • COMPOUND, LIGHT-EMITTING MATERIAL, AND ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20190013481
    Abstract: A compound having a structure represented by the following general formula emits delayed fluorescent light and is useful as a light-emitting material. Three or more of R1, R2, R4, and R5 each represent a 9-carbazolyl group, a 10-phenoxazyl group, or a 10-phenothiazyl group, and the balance thereof and R3 each represent a hydrogen atom or a substituent, but exclude a cyano group. R3 excludes an aryl group, a heteroaryl group, and an alkynyl group.
    Type: Application
    Filed: December 28, 2016
    Publication date: January 10, 2019
    Inventors: Keiro NASU, Chihaya ADACHI, Hajime NAKANOTANI, Hiroko NOMURA
  • Organic electroluminescence element and compound used therein
    Patent number: 9660198
    Abstract: An organic electroluminescence element in which a compound represented by the general formula below is used in a light-emitting layer exhibits a high emission efficiency and is inexpensive to provide. At least one of R1 to R8 and R17 represent an electron-donating group and the others represent a hydrogen atom; at least one of R9 to R16 represent an electron-withdrawing group that does not have an unshared electron pair at the ?-position thereof and the others represent a hydrogen atom; Z represents a single bond or >C?Y; Y represents O, S, C(CN)2 or C(COOH)2; provided that when Z is a single bond, then at least one of R9 to R16 is an electron-withdrawing group that does not have an unshared electron pair at the ?-position thereof.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: May 23, 2017
    Assignee: KYULUX, INC.
    Inventors: Tetsuya Nakagawa, Chihaya Adachi, Hiroko Nomura, Gabor Mehes, Keiro Nasu