Patents by Inventor Hirotaka Ishii

Hirotaka Ishii 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: 11335481
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: May 17, 2022
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
  • Patent number: 11328846
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium, at least one second element selected from the group consisting of neodymium, samarium, europium, and gadolinium, at least one third element selected from the group consisting of yttrium, terbium, dysprosium, and holmium, and at least one fourth element selected from the group consisting of erbium, thulium, ytterbium, and lutetium. When the number of atoms of the first element is N(PA), the number of atoms of the second element is N(SA), and the number of atoms of the fourth element is N(CA), 1.5×(N(PA)+N(SA))?N(CA) or 2×(N(CA)?N(PA))?N(SA) is satisfied.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: May 10, 2022
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
  • Publication number: 20220137550
    Abstract: An image forming apparatus includes an apparatus body, a first process cartridge including a first image bearing member and a first developing roller and detachably attached to the apparatus body, a toner cartridge configured to accommodate the first toner and detachably attached to the apparatus body independently from the first process cartridge, and a second process cartridge including a second image bearing member and a second developing roller and detachably attached to the apparatus body and configured not to be replenished with the second toner in a state where the second process cartridge is attached to the apparatus body.
    Type: Application
    Filed: October 14, 2021
    Publication date: May 5, 2022
    Inventors: Hirotaka Ishii, Kenji Abe
  • Publication number: 20220085270
    Abstract: An oxide superconductor of an embodiment includes an oxide superconducting layer including a first superconducting region containing barium, copper, and a first rare earth element, having a continuous perovskite structure, and extending in a first direction, a second superconducting region containing barium, copper, and a second rare earth element, having a continuous perovskite structure, and extending in the first direction, and a non-superconducting region disposed between the first and the second superconducting region, containing praseodymium, barium, copper, and a third rare earth element, a ratio of the number of atoms of the praseodymium to a sum of the number of atoms of the third rare earth element and the number of atoms of the praseodymium which is 20% or more, having a continuous perovskite structure continuous with the perovskite structure of the first superconducting region and the perovskite structure of the second superconducting region, and extending in the first direction.
    Type: Application
    Filed: February 25, 2021
    Publication date: March 17, 2022
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi ARAKI, Hirotaka ISHII
  • Patent number: 11124378
    Abstract: A sheet discharging apparatus includes a discharge portion including a first member configured to apply a force to a first region of a sheet from an upper surface and a second member configured to apply a force to a second region of the sheet from a lower surface, and a contact portion including a first guide surface disposed contactably with the first region and a second guide surface disposed contactably with the second region. The first guide surface is formed such that an angle with respect to a tangential line at a contact point between the first member and the first region of the sheet becomes a first angle. The second guide surface is formed such that an angle with respect to a tangential line at a contact point between the second member and the second region of the sheet becomes a second angle which is smaller than the first angle.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: September 21, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshisuke Kasuya, Kenichirou Isobe, Hirotaka Ishii
  • Publication number: 20210278801
    Abstract: A developing cartridge includes a storage medium. A first contact portion is provided in a photoconductor unit and configured to be electrically connected to the storage medium. A second contact portion is provided in an apparatus body. The photoconductor unit is configured to, in a case of attaching the photoconductor unit to the apparatus body, move from a first position to a second position while being guided by a guide member and then move from the second position to a third position below the second position. At least one of the first contact portion and the second contact portion is capable of being displaced such that engagement between the first contact portion and the second contact portion is performed while the photoconductor unit moves by being guided by the guide member, and the engagement is maintained while the photoconductor unit moves from the second position to the third position.
    Type: Application
    Filed: February 10, 2021
    Publication date: September 9, 2021
    Inventor: Hirotaka Ishii
  • Publication number: 20210002097
    Abstract: A sheet discharging apparatus includes a discharge portion including a first member configured to apply a force to a first region of a sheet from an upper surface and a second member configured to apply a force to a second region of the sheet from a lower surface, and a contact portion including a first guide surface disposed contactably with the first region and a second guide surface disposed contactably with the second region. The first guide surface is formed such that an angle with to a tangential line at a contact point between the first member and the first region of the sheet becomes a first angle. The second guide surface is formed such that an angle to a tangential line at a contact point between the second member and the second region of the sheet becomes a second angle which is smaller than the first angle.
    Type: Application
    Filed: June 17, 2020
    Publication date: January 7, 2021
    Inventors: Yoshisuke Kasuya, Kenichirou Isobe, Hirotaka Ishii
  • Publication number: 20200328016
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium, at least one second element selected from the group consisting of neodymium, samarium, europium, and gadolinium, at least one third element selected from the group consisting of yttrium, terbium, dysprosium, and holmium, and at least one fourth element selected from the group consisting of erbium, thulium, ytterbium, and lutetium. When the number of atoms of the first element is N(PA), the number of atoms of the second element is N(SA), and the number of atoms of the fourth element is N(CA), 1.5×(N(PA)+N(SA))?N(CA) or 2×(N(CA)?N(PA))?N(SA) is satisfied.
    Type: Application
    Filed: April 29, 2020
    Publication date: October 15, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi ARAKI, Hirotaka ISHII, Nao KOBAYASHI
  • Publication number: 20200265975
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Application
    Filed: April 30, 2020
    Publication date: August 20, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi ARAKI, Hirotaka Ishii, Nao Kobayashi
  • Patent number: 10692634
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium, at least one second element selected from the group consisting of neodymium, samarium, europium, and gadolinium, at least one third element selected from the group consisting of yttrium, terbium, dysprosium, and holmium, and at least one fourth element selected from the group consisting of erbium, thulium, ytterbium, and lutetium. When the number of atoms of the first element is N(PA), the number of atoms of the second element is N(SA), and the number of atoms of the fourth element is N(CA), 1.5×(N(PA)+N(SA))?N(CA) or 2×(N(CA)?N(PA))?N(SA) is satisfied.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 23, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
  • Patent number: 10679779
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: June 9, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
  • Patent number: 10541073
    Abstract: A superconducting coil of an embodiment includes a superconducting wire including an oxide superconductor layer. The oxide superconductor layer has a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: January 21, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Araki, Kenji Tasaki, Hirotaka Ishii
  • Patent number: 10183822
    Abstract: A sheet feeding unit, attached to a sheet feeding apparatus that feeds a sheet, includes an endless belt, first and second rotary members, and a holding device. The endless belt contacts a sheet stacked on a stacking device to feed the sheet. The first and second rotary members contact an inner periphery of the endless belt to support the endless belt. The second rotary member faces, via the endless belt, a separation device that separates the sheet from the endless belt. The holding device holds the first and second rotary members. The endless belt includes protruding and depressed portions on the inner periphery. The second rotary member includes protruding and depressed driving portions that mesh with the protruding and depressed portions to transmit a driving force to the endless belt to, in turn, rotate the endless belt to feed the sheet in contact with the endless belt.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: January 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirotaka Ishii, Masato Suzuki
  • Publication number: 20180118479
    Abstract: A sheet feeding unit, attached to a sheet feeding apparatus that feeds a sheet, includes an endless belt, first and second rotary members, and a holding device. The endless belt contacts a sheet stacked on a stacking device to feed the sheet. The first and second rotary members contact an inner periphery of the endless belt to support the endless belt. The second rotary member faces, via the endless belt, a separation device that separates the sheet from the endless belt. The holding device holds the first and second rotary members. The endless belt includes protruding and depressed portions on the inner periphery. The second rotary member includes protruding and depressed driving portions that mesh with the protruding and depressed portions to transmit a driving force to the endless belt to, in turn, rotate the endless belt to feed the sheet in contact with the endless belt.
    Type: Application
    Filed: October 23, 2017
    Publication date: May 3, 2018
    Inventors: Hirotaka Ishii, Masato Suzuki
  • Publication number: 20180061537
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium, at least one second element selected from the group consisting of neodymium, samarium, europium, and gadolinium, at least one third element selected from the group consisting of yttrium, terbium, dysprosium, and holmium, and at least one fourth element selected from the group consisting of erbium, thulium, ytterbium, and lutetium. When the number of atoms of the first element is N(PA), the number of atoms of the second element is N(SA), and the number of atoms of the fourth element is N(CA), 1.5×(N(PA)+N(SA))?N(CA) or 2×(N(CA)?N(PA))?N(SA) is satisfied.
    Type: Application
    Filed: March 1, 2017
    Publication date: March 1, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
  • Publication number: 20180061541
    Abstract: A superconducting coil of an embodiment includes a superconducting wire including an oxide superconductor layer. The oxide superconductor layer has a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Application
    Filed: March 1, 2017
    Publication date: March 1, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi ARAKI, Kenji Tasaki, Hirotaka Ishii
  • Publication number: 20180047487
    Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).
    Type: Application
    Filed: February 21, 2017
    Publication date: February 15, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi ARAKI, Hirotaka ISHII, Nao KOBAYASHI
  • Patent number: 9022381
    Abstract: An image forming apparatus includes a sheet feeding device having a separation pad holding unit, a separation pad fixing unit, and a compression unit while vibration damping unit(such as a sponge member and a Mylar member) that is attached to the compression unit does not contact the separation pad holding unit and the separation pad fixing unit.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shota Kase, Minoru Kawanishi, Hirotaka Ishii, Keisuke Fujita, Akinori Yokota
  • Publication number: 20140197592
    Abstract: An image forming apparatus includes a sheet feeding device having a separation pad holding unit, a separation pad fixing unit, and a compression unit while vibration damping unit(such as a sponge member and a Mylar member) that is attached to the compression unit does not contact the separation pad holding unit and the separation pad fixing unit.
    Type: Application
    Filed: January 7, 2014
    Publication date: July 17, 2014
    Inventors: Shota Kase, Minoru Kawanishi, Hirotaka Ishii, Keisuke Fujita, Akinori Yokota
  • Publication number: 20130267629
    Abstract: The mesoporous silica particles each comprise a core particle comprising first mesopores, wherein a periphery of the core particle is covered with silica. Preferably, second mesopores, smaller than the first mesopores, are provided in the silica-covered part formed by the silica covering. The mesoporous silica particles are produced by: a surfactant complex silica particle preparation step of mixing a surfactant, water, an alkali, a hydrophobic part-containing additive and a silica source to thereby prepare surfactant complex silica particles, said hydrophobic part-containing additive including a hydrophobic part for increasing a volume of micelles to be formed by the surfactant; and a silica covering step of adding the silica source to the surfactant complex silica particles to thereby cover a periphery of each core particle with silica.
    Type: Application
    Filed: December 22, 2011
    Publication date: October 10, 2013
    Applicants: THE UNIVERSITY OF TOKYO, PANASONIC CORPORATION
    Inventors: Ayumu Fukuoka, Hiroki Yabe, Tatsuya Okubo, Atsushi Shimojima, Hirotaka Ishii