Patents by Inventor Katsuyuki Youfu

Katsuyuki Youfu 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).

  • Patent number: 11563178
    Abstract: The disclosure relates to organic electroluminescent elements, compounds for use in the elements, and devices using the elements, which include a compound represented by the following General Formula (1): where R1 to R3 and R6 to R8 each independently represents a hydrogen atom, which may be a deuterium atom, or a substituent with a Hammett substituent constant ?p value of ?0.15 or more, R5, R9 and R10 each independently represents a hydrogen atom or a substituent, L1 represents a divalent linking group, DG1 represents a donor group, and n1 represents 1 or 2, and where R1 to R3, R5 to R10, L1, and DG1 are not bound to each other to form a ring.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: January 24, 2023
    Assignee: UDC IRELAND LIMITED
    Inventors: Koji Takaku, Yasunori Yonekuta, Wataru Sotoyama, Katsuyuki Youfu, Yuki Hirai, Tetsu Kitamura, Toru Watanabe, Tianhua Ouyang
  • Patent number: 9954190
    Abstract: An organic electroluminescent element that uses a compound expressed by the following general formula emits dark blue light and exhibits little change in chromaticity during brightness modulation. (n1 is an integer from 0 to 8; the R1 [groups] are each independently a substituent substituted for a hydrogen atom of the pyrene skeleton; X is CRaRb (Ra and Rb are each independently a hydrogen atom or a substituent), O, S, or SiRdRe (Rd and Re are each independently a hydrogen atom or a substituent); and A1 to A4 represent each independently either N or CRf (Rf represents a hydrogen atom or a substituent, and two adjacent Rf [groups] may jointly form a saturated or unsaturated ring, but no more than two rings may be formed jointly by two or more of the Rf [groups]).
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: April 24, 2018
    Assignee: UDC IRELAND LIMITED
    Inventors: Saki Takada, Yasunori Yonekuta, Toshihiro Ise, Tetsu Kitamura, Toru Watanabe, Wataru Sotoyama, Koji Takaku, Katsuyuki Youfu
  • Publication number: 20180069179
    Abstract: The disclosure relates to organic electroluminescent elements, compounds for use in the elements, and devices using the elements, which include a compound represented by the following General Formula (1): where R1 to R3 and R6 to R8 each independently represents a hydrogen atom, which may be a deuterium atom, or a substituent with a Hammett substituent constant ?p value of ?0.15 or more, R5, R9 and R10 each independently represents a hydrogen atom or a substituent, L1 represents a divalent linking group, DG1 represents a donor group, and n1 represents 1 or 2, and where R1 to R3, R5 to R10, L1, and DG1 are not bound to each other to form a ring.
    Type: Application
    Filed: November 8, 2017
    Publication date: March 8, 2018
    Inventors: Koji Takaku, Yasunori Yonekuta, Wataru Sotoyama, Katsuyuki Youfu, Yuki Hirai, Tetsu Kitamura, Toru Watanabe, Tianhua Ouyang
  • Patent number: 9705096
    Abstract: Provided are an organic transistor having high carrier mobility that contains a compound represented by the following formula in a semiconductor active layer (each of X1 to X4 represents NR100, an O atom, or a S atom; NR100 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an acyl group, an aryl group, or a heteroaryl group; each of R1 to R6 represents a hydrogen atom or a substituent; at least one of R1, R2, R3, R4, R5, or R6 is a substituent represented by -L-R; L is a divalent linking group having a specific structure; and R is an alkyl group having 5 to 19 carbon atoms); a compound; an organic semiconductor material for a non-light-emitting organic semiconductor device; a material for an organic transistor; a coating solution for a non-light-emitting organic semiconductor device; an organic semiconductor film for a non-light-emitting organic semiconductor device; and a method for manufacturing an organic semiconductor film for a non-light-emitting organic semiconductor device
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: July 11, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Katsuyuki Youfu, Yuki Hirai, Kensuke Masui
  • Patent number: 9705095
    Abstract: Provided are an organic transistor having high carrier mobility that contains a compound represented by the following formula in a semiconductor active layer; a compound; an organic semiconductor material for a non-light-emitting organic semiconductor device; a material for an organic transistor; a coating solution for a non-light-emitting organic semiconductor device; and an organic semiconductor film for a non-light-emitting organic semiconductor device (each of X1 and X2 represents NR13, an O atom, or a S atom; A1 represents CR7 or a N atom; A2 represents CR8 or a N atom; R13 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, or an acyl group; each of R1 to R8 independently represents a hydrogen atom or a substituent; at least one of R1, R2, R3, R4, R5, R6, R7, or R8 is a substituent represented by -L-R; L represents a divalent linking group having a specific structure; and R represents an alkyl group, a cyano group, a vinyl group, an ethynyl group, an oxyethylene group, an oli
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: July 11, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Katsuyuki Youfu, Yuki Hirai, Kensuke Masui
  • Publication number: 20160315271
    Abstract: Provided are an organic transistor having high carrier mobility that contains a compound represented by the following formula in a semiconductor active layer; a compound; an organic semiconductor material for a non-light-emitting organic semiconductor device; a material for an organic transistor; a coating solution for a non-light-emitting organic semiconductor device; and an organic semiconductor film for a non-light-emitting organic semiconductor device (each of X1 and X2 represents NR13, an O atom, or a S atom; A1 represents CR7 or a N atom; A2 represents CR8 or a N atom; R13 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, or an acyl group; each of R1 to R8 independently represents a hydrogen atom or a substituent; at least one of R1, R2, R3, R4, R5, R6, R7, or R8 is a substituent represented by -L-R; L represents a divalent linking group having a specific structure; and R represents an alkyl group, a cyano group, a vinyl group, an ethynyl group, an oxyethylene group, an oli
    Type: Application
    Filed: June 30, 2016
    Publication date: October 27, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Katsuyuki YOUFU, Yuki HIRAI, Kensuke MASUI
  • Publication number: 20160315272
    Abstract: Provided are an organic transistor having high carrier mobility that contains a compound represented by the following formula in a semiconductor active layer (each of X1 to X4 represents NR100, an O atom, or a S atom; NR100 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an acyl group, an aryl group, or a heteroaryl group; each of R1 to R6 represents a hydrogen atom or a substituent; at least one of R1, R2, R3, R4, R5, or R6 is a substituent represented by -L-R; L is a divalent linking group having a specific structure; and R is an alkyl group having 5 to 19 carbon atoms); a compound; an organic semiconductor material for a non-light-emitting organic semiconductor device; a material for an organic transistor; a coating solution for a non-light-emitting organic semiconductor device; an organic semiconductor film for a non-light-emitting organic semiconductor device; and a method for manufacturing an organic semiconductor film for a non-light-emitting organic semiconductor device
    Type: Application
    Filed: July 6, 2016
    Publication date: October 27, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Katsuyuki YOUFU, Yuki HIRAI, Kensuke MASUI
  • Publication number: 20160301018
    Abstract: Provided are an organic transistor containing a compound represented by the following formula in a semiconductor active layer; a compound which improves carrier mobility when being used in a semiconductor layer of an organic transistor and exhibits high solubility in an organic solvent; an organic semiconductor material for a non-light-emitting organic semiconductor device; a material for an organic transistor; a coating solution for a non-light-emitting organic semiconductor device; and an organic semiconductor film for a non-light-emitting organic semiconductor device (each of X1 and X2 represents NR13, an O atom, or a S atom; A1 represents CR7 or a N atom; A2 represents CR8 or a N atom; R13 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, or an acyl group; each of R1 to R8 independently represents a hydrogen atom or a substituent; at least one of R1, R2, R3, R4, R5, R6, R7, or R8 is a substituent represented by -L-R; L represents a divalent linking group having a specific str
    Type: Application
    Filed: June 17, 2016
    Publication date: October 13, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Katsuyuki YOUFU, Yuki HIRAI, Kensuke MASUI
  • Patent number: 9412963
    Abstract: The disclosure relates to organic electroluminescent elements, materials for use in the elements, and devices using the elements, which include a compound represented by the following General Formula (1): where R1 to R12 each independently represents a hydrogen atom or a substituent and which may be bound to each other to form a non-aromatic ring, where Z1 to Z4 each independently represents a hydrogen atom or a substituent, and where Z1 and Z2, and Z3 and Z4 may be bound to each other to form a ring.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: August 9, 2016
    Assignee: UDC Ireland Limited
    Inventors: Koji Takaku, Yasunori Yonekuta, Katsuyuki Youfu, Wataru Sotoyama, Tianhua Ouyang, Tetsu Kitamura, Toru Watanabe
  • Publication number: 20140159024
    Abstract: An organic electroluminescent element that uses a compound expressed by the following general formula emits dark blue light and exhibits little change in chromaticity during brightness modulation. (n1 is an integer from 0 to 8; the R1 [groups] are each independently a substituent substituted for a hydrogen atom of the pyrene skeleton; X is CRaRb (Ra and Rb are each independently a hydrogen atom or a substituent), O, S, or SiRdRe (Rd and Re are each independently a hydrogen atom or a substituent); and A1 to A4 represent each independently either N or CRf (Rf represents a hydrogen atom or a substituent, and two adjacent Rf [groups] may jointly form a saturated or unsaturated ring, but no more than two rings may be formed jointly by two or more of the Rf [groups]).
    Type: Application
    Filed: June 5, 2012
    Publication date: June 12, 2014
    Applicant: UDC IRELAND LIMITED
    Inventors: Saki Takada, Yasunori Yonekuta, Toshihiro Ise, Tetsu Kitamura, Toru Watanabe, Wataru Sotoyama, Koji Takaku, Katsuyuki Youfu
  • Patent number: 7722784
    Abstract: The liquid crystal composition of the present invention contains a compound represented by the following Formula (1) and a liquid crystal. In Formula (1), at least one among R1 to R7 is a liquid crystalline substituent, and those among R1 to R7 that are not a liquid crystalline substituent each independently represent a hydrogen atom or a substituent. X and Y each independently represent an alkyl group, a halogen atom, an alkoxy group, or an alkylthio group. Z represents an alkyl group having 3 or more carbon atoms, an acyl group, or an aryl group. A represents an oxygen atom, a sulfur atom, or a nitrogen atom. n represents 0 or 1. The liquid crystal device, reflection display material, and light modulating material of the invention contain the liquid crystal composition.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: May 25, 2010
    Assignee: Fujifilm Corporation
    Inventors: Katsuyuki Youfu, Koji Takaku
  • Publication number: 20090074991
    Abstract: The liquid crystal composition of the present invention contains a compound represented by the following Formula (1) and a liquid crystal. In Formula (1), at least one among R1 to R7 is a liquid crystalline substituent, and those among R1 to R7 that are not a liquid crystalline substituent each independently represent a hydrogen atom or a substituent. X and Y each independently represent an alkyl group, a halogen atom, an alkoxy group, or an alkylthio group. Z represents an alkyl group having 3 or more carbon atoms, an acyl group, or an aryl group. A represents an oxygen atom, a sulfur atom, or a nitrogen atom. n represents 0 or 1. The liquid crystal device, reflection display material, and light modulating material of the invention contain the liquid crystal composition.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 19, 2009
    Inventors: Katsuyuki Youfu, Koji Takaku