Patents by Inventor Masashi Tada

Masashi Tada 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: 20240224800
    Abstract: Provided is an organic EL device having low-voltage drivability, high emission efficiency, and a long lifetime. An organic EL device having a low voltage, high emission efficiency, and a long lifetime can be obtained by using a material for an organic electroluminescent device represented by the following general formula (1), wherein Ar1 is a group represented by the general formula (2) or the like, “*” represents a bonding site, some or all hydrogen atoms in the compounds represented by the general formula (1), the general formula (2), and the like are optionally replaced by deuterium atoms, and n represents an integer of 0 to 1.
    Type: Application
    Filed: March 30, 2022
    Publication date: July 4, 2024
    Applicant: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventor: Masashi TADA
  • Publication number: 20240142482
    Abstract: Disclosed is a specimen measurement apparatus comprising: a measurement unit configured to suction a specimen from a specimen container and measure the suctioned specimen; and a specimen transport unit configured to transport the specimen container to the measurement unit, wherein the specimen transport unit includes a rack setting part configured to allow a specimen rack to be set thereon, the specimen rack holding the specimen container that has not been subjected to specimen suction by the measurement unit, a rack collection part configured to collect the specimen rack holding the specimen container that has been subjected to specimen suction by the measurement unit, and an interruption specimen setting part configured to allow the specimen rack to be set thereon, the specimen rack holding the specimen container that is to be subjected to specimen suction by the measurement unit in preference to the specimen container held by the specimen rack having been set on the rack setting part, and the interruption
    Type: Application
    Filed: October 23, 2023
    Publication date: May 2, 2024
    Applicant: Sysmex Corporation
    Inventors: Masashi Tada, Taku INOUE, Hironori Katsumi, Takaaki Nagai
  • Publication number: 20240142483
    Abstract: Disclosed is a specimen measurement apparatus comprising: a measurement unit configured to suction a specimen from a specimen container and measure the suctioned specimen; and a specimen transport unit configured to transport the specimen container to the measurement unit, wherein the specimen transport unit includes a first transport part including a first placement surface configured to allow a specimen rack to be placed thereon, the first transport part being configured to transport a plurality of the specimen racks, each holding the specimen container, on the first placement surface, and a second transport part disposed above the first transport part and including a second placement surface configured to allow the specimen rack to be placed thereon, the second transport part being configured to transport a plurality of the specimen racks on the second placement surface, and at least one of the first transport part and the second transport part is configured to allow the specimen rack to be taken out there
    Type: Application
    Filed: October 23, 2023
    Publication date: May 2, 2024
    Applicant: Sysmex Corporation
    Inventors: Masashi Tada, Taku INOUE, Hironori KATSUMI
  • Publication number: 20230371375
    Abstract: Provided are an emission material and an organic EL device including the emission material and having high emission efficiency and a long lifetime. An organic EL device comprising light emitting layers between an anode and a cathode opposite to each other; wherein at least one of the light emitting layers contains, as a light emitting dopant, a compound in which a backbone having a specific 5-ring-fused ring structure, and a boron atom are combined, and the compound is represented by the following general formula (1).
    Type: Application
    Filed: October 15, 2021
    Publication date: November 16, 2023
    Applicants: NIPPON STEEL Chemical & Material Co., Ltd., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Masashi TADA, Atsushi KAWADA, Yuta SAGARA, Sayuri KITERA, Takuma YASUDA, Hyukgi MIN, In Seob PARK
  • Patent number: 11818950
    Abstract: Provided is a thermally activated delayed fluorescent organic electroluminescent device having a low driving voltage, high luminous efficiency, and a long lifetime. The organic electroluminescent device includes light-emitting layers between an anode and a cathode opposite to each other, and at least one of the light-emitting layers contains a thermally activated delayed fluorescent material, or the thermally activated delayed fluorescent material and a host material. The thermally activated delayed fluorescent material is represented by the following general formula (1) where A represents an electron-withdrawing group, such as a CN group, and D1 and D2 each represent an electron-donating group having an indole ring structure.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: November 14, 2023
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Masashi Tada, Kazuaki Yoshimura, Atsushi Kawada, Katsuhide Noguchi, Yuta Sagara, Junya Ogawa
  • Publication number: 20230309400
    Abstract: Provided is a thermally activated delayed fluorescence organic EL device having high emission efficiency and a long lifetime. An organic EL device comprising light emitting layers between an anode and a cathode opposite to each other; wherein at least one of the light emitting layers contains, as a thermally activated delayed fluorescence material, a compound in which a boron-containing electron acceptor backbone is linked with an electron donor backbone having a specific fused ring structure; and the compound is represented by the following general formula (1) where X1 is O or S.
    Type: Application
    Filed: July 6, 2021
    Publication date: September 28, 2023
    Applicants: NIPPON STEEL Chemical & Material Co., Ltd., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Masashi TADA, Yuta SAGARA, Atsushi KAWADA, Takuma YASUDA, In Seob PARK, Jong Uk KIM, So SHIKITA
  • Publication number: 20230276644
    Abstract: Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers has a difference between excited singlet energy (Si) and excited triplet energy (Ti) of 0.20 eV or less and includes a light emitting dopant represented by the following formula (5), a first host selected from biscarbazole compounds, and a second host selected from N-containing 6-membered ring compounds, wherein X3 is N—Ar4, O, or S and at least one X3 is N—Ar4.
    Type: Application
    Filed: August 26, 2021
    Publication date: August 31, 2023
    Applicant: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Sayuri KITERA, Masashi TADA, Munetomo INOUE, Ayaka TERADA, Satoshi UKIGAI
  • Publication number: 20230145235
    Abstract: Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers includes a first host selected from indolocarbazole compounds, a second host selected from the compounds represented by the following general formula (2), and, as a light emitting dopant, a polycyclic aromatic compound represented by the following general formula (3) or a polycyclic aromatic compound represented by the general formula (3) as a substructure, wherein Y4 is B, P, P?O, P?S, Al, Ga, As, Si—R4 or Ge—R5, and X4 is O, N—Ar4, S or Se.
    Type: Application
    Filed: March 19, 2021
    Publication date: May 11, 2023
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Satoshi UKIGAI, Masashi TADA, Munetomo INOUE, Ayaka TERADA, Sayuri KITERA
  • Publication number: 20230139757
    Abstract: Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic EL device comprises one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains a first host, a second host, and a light emitting dopant; the first host is a carbazole compound or a bicarbazole compound; the second host is an indolocarbazole compound; and the light emitting dopant is a polycyclic aromatic compound represented by the general formula (4) or a polycyclic aromatic compound having this structure as a partial structure. In the formula, Y4 is B, P, P?O, P?S, AL, Ga, As, Si—R4, or Ge—R41, and X4 is O, N—Ar4, S, or Se.
    Type: Application
    Filed: March 19, 2021
    Publication date: May 4, 2023
    Applicant: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Masashi TADA, Munetomo INOUE, Ayaka TERADA, Yuta SAGARA
  • Publication number: 20230136708
    Abstract: Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. This organic electroluminescent device includes one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers comprises one or more hosts selected from the indolocarbazole compounds represented by the following general formula (1) and, as a light emitting dopant, a polycyclic aromatic compound represented by the following general formula (2) or a polycyclic aromatic compound having the structure represented by the general formula (2) as a substructure, and wherein in the formulae Z is an indolocarbazole ring-containing group, X1 is O, N—Ar3, S, or Se, and Y1 is B, P, P?O, P?S, Al, Ga, As, Si—R2 or Ge—R3.
    Type: Application
    Filed: March 19, 2021
    Publication date: May 4, 2023
    Applicant: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Munetomo INOUE, Masashi TADA, Yuta SAGARA, Ayaka TERADA
  • Publication number: 20230113101
    Abstract: To provide an organic electroluminescent device having high efficiency while having a driving voltage. This organic electroluminescent device includes an anode, an organic layer and a cathode stacked on a substrate, at least one layer of the organic layer is a light-emitting layer containing a first host, a second host and a light-emitting dopant material, the first host is selected from a compound represented by the following general formula (1), and the second host is selected from a biscarbazole compound binding at a position other than the N-position, an indolocarbazole compound, or a carbazole compound in which a plurality of carbazole rings bind at the N-position. In the formula, a ring A is represented by formula (1b) or (1c), X represents NR, S, O, or CR2, and at least one Y represents N.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 13, 2023
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Junya OGAWA, Masashi TADA, Takahiro KAI, Kazunari YOSHIDA, Ikumi KITAHARA
  • Patent number: 11600786
    Abstract: Provided is an organic EL device having high efficiency and high driving stability while being driven at a low voltage. The organic electroluminescent device includes one or more light-emitting layers between an anode and a cathode opposite to each other. At least one of the light-emitting layers contains a host material and a light-emitting dopant, and (i) a first host formed of an indolocarbazole compound having one or two indolocarbazole rings, and (ii) a second host formed of a carbazole compound having a plurality of carbazole rings and having a bond structure represented by the following general formula (3) are used as the host material.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: March 7, 2023
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Junya Ogawa, Takahiro Kai, Masanori Hotta, Yuji Ikenaga, Mitsuru Sakai, Masashi Tada, Tokiko Ueda, Katsuhide Noguchi
  • Publication number: 20230023388
    Abstract: Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime. An organic electroluminescent device comprising one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains an organic emission material having a difference between excited singlet energy (S1) and excited triplet energy (T1) (?EST) of 0.20 eV or less as a light emitting dopant, a first host selected from the compounds represented by the following general formula (1), and a second host selected from the compounds represented by the following general formula (2).
    Type: Application
    Filed: December 10, 2020
    Publication date: January 26, 2023
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Masashi TADA, Munetomo INOUE, Satoshi UKIGAI, Ayaka TERADA
  • Publication number: 20220348557
    Abstract: To provide an organic electroluminescent device having high efficiency and high driving stability while having a low driving voltage. The organic electroluminescent device has one or more light-emitting layers between an anode and a cathode opposed to each other, wherein at least one of the light-emitting layers is a light-emitting layer composed of a vapor deposition layer containing a first host, a second host and a light-emitting dopant material; the first host is selected from oligopyridine compounds represented by the general formula (1); and the second host is selected from carbazole compounds having two or more carbazole rings, indolocarbazole compounds having an indolocarbazole ring or compounds having a carbazole ring and an indolocarbazole ring.
    Type: Application
    Filed: September 16, 2020
    Publication date: November 3, 2022
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Junya OGAWA, Takahiro KAI, Masashi TADA, Kazunari YOSHIDA
  • Patent number: 11374178
    Abstract: Provided is a thermally activated delayed fluorescence-emitting organic EL element having a low driving voltage, high luminous efficiency, and a prolonged lifespan. The organic EL element contains one or more light-emitting layers between an anode and a cathode that face each other, and at least one light-emitting layer contains a host material composed of a carbazole compound represented by formula (1) and a thermally activated delayed fluorescence material composed of an indolocarbazole compound containing an indolocarbazole ring in its molecule. Here, L1 represents an aromatic group, and at least one R1 represents a carbazolyl group, and n is 1 or 2.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: June 28, 2022
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Yuta Sagara, Masashi Tada, Kazuaki Yoshimura, Junya Ogawa, Katsuhide Noguchi
  • Publication number: 20220173326
    Abstract: Provided are an organic EL device having high luminous efficiency and a prolonged lifespan with a low driving voltage, and a melt mixture for an organic electroluminescent device used in the organic EL device. The melt mixture for an organic electroluminescent device is a melt mixture of at least two types of organic compounds including a first organic compound and a second organic compound, and a difference in vapor deposition temperature between the first organic compound and the second organic compound is 20° C. or less, and a difference between a PL maximum emission wavelength of the melt mixture and a PL maximum emission wavelength of any of the first organic compound and the second organic compound is within ±10 nm. The melt mixture is suitable as a host material of a light-emitting layer.
    Type: Application
    Filed: March 13, 2020
    Publication date: June 2, 2022
    Applicant: NIPPON STEEL Chemical & Material Co., Ltd.
    Inventors: Masashi TADA, Yuta SAGARA
  • Patent number: 11193462
    Abstract: In an air cleaner, an air cleaner case having an upper opening which opens upward is formed. The air cleaner case is formed of a front wall, a rear fender, and right and left side covers. The upper opening is closed by a seat. A sound absorbing member is bonded to a bottom plate of the seat and housed in an air cleaner space. The intake noise in the air cleaner is absorbed by the sound absorbing member.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: December 7, 2021
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masashi Tada, Seiichiro Eguchi, Yohei Suzuki, Kazuki Seri
  • Patent number: 11189802
    Abstract: There is provided an organic EL element having high efficiency and high driving stability despite having a low driving voltage.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: November 30, 2021
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Junya Ogawa, Masashi Tada
  • Patent number: 11171295
    Abstract: Provided is an organic electroluminescent (organic EL) element that exhibits a high efficiency while having a low drive voltage, and that exhibits a high stability while being driven. The organic electroluminescent element contains, in a light-emitting layer formed between an anode and a cathode opposing each other, a first host selected from indolocarbazole compounds represented by general formula (1), a second host selected from carbazole compounds represented by general formula (2), and a light-emitting dopant material. Here, Ar2 and Ar3 are aromatic hydrocarbon groups, L1 is a direct bond or a phenylene group, and L2 is an o-phenylene group.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: November 9, 2021
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Junya Ogawa, Masashi Tada, Yuji Ikenaga
  • Patent number: 11088334
    Abstract: Provided is an organic electroluminescence device (organic EL device) that is driven at a low voltage, exhibits high luminous efficiency and has a long service life. The organic EL device contains one or more light emitting layers and one or more electron transport layers between opposing anode and cathode, wherein at least one of the electron transport layers contains a an indolocarbazole compound represented by general formula (1) below and an electron donor. In the formula, ring A represents an aromatic hydrocarbon ring represented by formula (1a), ring B represents a heterocyclic ring represented by formula (1b), L represents a single bond or aromatic hydrocarbon group, X represents N or C—Ar1 and at least one of X represents N, and Y and Ar1 represent a hydrogen atom, aromatic hydrocarbon group or aromatic heterocyclic group.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: August 10, 2021
    Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Masashi Tada, Yuichi Sawada, Katsuhide Noguchi