Patents by Inventor Takayasu Sado

Takayasu Sado 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: 20200321526
    Abstract: An aromatic amine derivative represented by formula (1): wherein R1, R2, R3, L, Ar1, Ar2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.
    Type: Application
    Filed: June 17, 2020
    Publication date: October 8, 2020
    Applicant: IDEMITSU KOSAN CO., LTD
    Inventors: Tomoki KATO, Takayasu SADO, Takahiro FUJIYAMA
  • Publication number: 20200313090
    Abstract: An aromatic amine derivative represented by formula (1): wherein R1, R2, R3, L, Ar1, Ar2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.
    Type: Application
    Filed: June 15, 2020
    Publication date: October 1, 2020
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki KATO, Takayasu SADO, Takahiro FUJIYAMA
  • Patent number: 10510964
    Abstract: A compound is represented by a formula (1) below. In the formula (1), X1 to X8 each independently represent a carbon atom to be bonded to a group represented by the following formula (20), CRX or a nitrogen atom. At least one of X1 to X8 is a carbon atom to be bonded to the group represented by the following formula (2). RX is each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or the like.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: December 17, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Publication number: 20190348615
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka MIZUTANI, Takayasu SADO
  • Patent number: 10418563
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: September 17, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Patent number: 10230057
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: March 12, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 10199580
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: February 5, 2019
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Publication number: 20180331299
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Application
    Filed: July 19, 2018
    Publication date: November 15, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka MIZUTANI, Takayasu SADO
  • Patent number: 10014477
    Abstract: An aromatic amine derivative represented by formula (1): wherein R1, R2, R3, L, AR1, Ar2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: July 3, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Patent number: 9966539
    Abstract: An organic electroluminescence device contains an anode and a cathode facing each other, and intervening therebetween at least two hole transporting layers and a light emitting layer sequentially, and one of the hole transporting layers contains a compound having a particular structure having a fluorene structure at the center thereof, and is not adjacent to the light emitting layer. The organic electroluminescence device has a hole transporting layer having an increased thickness, is capable of being controlled in the thickness of the optical film, and has an enhanced device capability.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: May 8, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Publication number: 20180123043
    Abstract: An aromatic amine derivative represented by formula (1): wherein R1, R2, R3, L, Ar1, Ar2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.
    Type: Application
    Filed: December 26, 2017
    Publication date: May 3, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki KATO, Takayasu SADO, Takahiro FUJIYAMA
  • Publication number: 20180102484
    Abstract: A compound is represented by a formula (1) below. In the formula (1), X1 to X8 each independently represent a carbon atom to be bonded to a group represented by the following formula (20), CRX or a nitrogen atom. At least one of X1 to X8 is a carbon atom to be bonded to the group represented by the following formula (2). RX is each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or the like.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 12, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka MIZUTANI, Takayasu Sado
  • Publication number: 20180102485
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Application
    Filed: December 13, 2017
    Publication date: April 12, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka MIZUTANI, Takayasu Sado
  • Publication number: 20180047917
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Application
    Filed: October 9, 2017
    Publication date: February 15, 2018
    Applicant: IDEMITSU KOSAN CO., LTD
    Inventors: Tetsuya INOUE, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 9893296
    Abstract: An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: February 13, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Patent number: 9871203
    Abstract: An organic EL device that has a high efficiency and a long service life, an electronic apparatus containing the organic EL device, and a compound capable of providing the organic EL device.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: January 16, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tomoki Kato, Takayasu Sado, Takahiro Fujiyama
  • Patent number: 9871206
    Abstract: A compound is represented by a formula (1) below. In the formula (1), X1 to X8 each independently represent a carbon atom to be bonded to a group represented by the following formula (20), CRX or a nitrogen atom. At least one of X1 to X8 is a carbon atom to be bonded to the group represented by the following formula (2). RX is each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or the like.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: January 16, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Patent number: 9847501
    Abstract: An aromatic heterocyclic derivative is represented by a formula (1) below. In the formula (1), X1 to X3 each are a nitrogen atom or CR1, with a proviso that at least one of X1 to X3 is a nitrogen atom. A is represented by a formula (2) and B is represented by a formula (4) below.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 19, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado
  • Patent number: 9818958
    Abstract: Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: November 14, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Tetsuya Inoue, Mitsunori Ito, Tomoki Kato, Kumiko Gorai, Kazuki Nishimura, Takayasu Sado
  • Patent number: 9748496
    Abstract: A specific nitrogen-containing heterocyclic compound having a urea structure, an electron transporting material containing the nitrogen-containing heterocyclic compound, and an organic electroluminescence device including a light emitting layer and an electron transporting layer between a cathode and an anode in which the electron transporting layer includes the electron transporting material or the nitrogen-containing heterocyclic derivative. An organic EL device exhibiting high emission efficiency even at low voltage and a material for organic EL devices are described.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: August 29, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Sayaka Mizutani, Takayasu Sado, Hiroki Ishida