Patents by Inventor Takahiro Kitagawa

Takahiro Kitagawa 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: 20240128406
    Abstract: A nitride semiconductor light-emitting element includes: a nitride semiconductor that has two resonator faces opposed to each other; and a dielectric multilayer film that is layered on at least one resonator face of the two resonator faces. For example, the dielectric multilayer film layered on a resonator face includes a first dielectric film layered on the resonator face and a second dielectric film layered on the first dielectric film. The first dielectric film includes aluminum oxynitride. The second dielectric film includes aluminum oxide. The first dielectric film is a crystalline film. At least one of chemical elements of yttrium or lanthanum is added to the first dielectric film. At least one of chemical elements of yttrium or lanthanum is added to the second dielectric film.
    Type: Application
    Filed: December 21, 2023
    Publication date: April 18, 2024
    Inventors: Shinji YOSHIDA, Hideo KITAGAWA, Takahiro OKAGUCHI
  • Patent number: 11945729
    Abstract: A method for producing a nickel cobalt complex hydroxide includes first crystallization of supplying a solution containing Ni, Co and Mn, a complex ion forming agent and a basic solution separately and simultaneously to one reaction vessel to obtain nickel cobalt complex hydroxide particles, and a second crystallization of, after the first crystallization, further supplying a solution containing nickel, cobalt, and manganese, a solution of a complex ion forming agent, a basic solution, and a solution containing said element M separately and simultaneously to the reaction vessel to crystallize a complex hydroxide particles containing nickel, cobalt, manganese and said element M on the nickel cobalt complex hydroxide particles crystallizing a complex hydroxide particles comprising Ni, Co, Mn and the element M on the nickel cobalt complex hydroxide particles.
    Type: Grant
    Filed: December 3, 2021
    Date of Patent: April 2, 2024
    Assignee: NICHIA CORPORATION
    Inventors: Hideki Yoshida, Masato Sonoo, Takahiro Kitagawa
  • Patent number: 11945882
    Abstract: Crystals of the compound represented by formula (1), a method for the production thereof, and a method for producing an antibody-drug conjugate using the crystals.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: April 2, 2024
    Assignee: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Tatsuya Yamaguchi, Takashi Kouko, Shigeru Noguchi, Yohei Yamane, Fumikatsu Kondo, Takahiro Aoki, Tadahiro Takeda, Kohei Sakanishi, Hitoshi Sato, Tsuyoshi Ueda, Shinji Matuura, Kei Kurahashi, Yutaka Kitagawa, Tatsuya Nakamura
  • Publication number: 20240093084
    Abstract: A chemical fluid for underground injection includes an inorganic substance, an antioxidant (e.g. ascorbic acid, gluconic acid, or a salt thereof, or ?-acetyl-?-butyrolactone, or bisulfite, or disulfite), and water. The inorganic substance may be a colloidal particle or a powder. The inorganic substance may be present in the chemical fluid in amounts of 0.001% by mass to 50% by mass based on the total mass of the chemical fluid for underground injection. The antioxidant may be present in the chemical fluid at a ratio of 0.0001 to 2 of the mass of the antioxidant to the mass of the inorganic substance. A surface of the inorganic substance may be coated with a silane compound. The chemical fluid may further include an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, or a mixture thereof.
    Type: Application
    Filed: January 11, 2022
    Publication date: March 21, 2024
    Applicants: NISSAN CHEMICAL CORPORATION, NISSAN CHEMICAL AMERICA CORPORATION
    Inventors: Takahiro OHORI, Hirotake KITAGAWA, Satoru MURAKAMI, Samuel MAGUIRE-BOYLE, John SOUTHWELL
  • Patent number: 11913862
    Abstract: The present invention aims to provide core-shell particles that can be used in a method of separating a substance to be separated and that allow obtainment of a highly purified product. Each of a plurality of core-shell particles (C) of the present invention includes a core layer (P) as magnetic silica particles containing the magnetic metal oxide particles (A) and a shell layer (Q) that is a silica layer on a surface of the core layer (P), an average thickness of a plurality of shell layers (Q) being 3 to 3000 nm, wherein a weight percentage of the magnetic metal oxide particles (A) in the core layer (P) is 60 to 95 wt % based on a weight of the core layer (P), and the plurality of core-shell particles (C) have a particle size distribution with a coefficient of variation of 50% or less.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: February 27, 2024
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takahiro Kitagawa, Masumi Ueda
  • Patent number: 11862796
    Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 ?m to less than 3 ?m and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: January 2, 2024
    Assignee: NICHIA CORPORATION
    Inventors: Tomooki Kawasaki, Kenichi Kobayashi, Takahiro Kitagawa
  • Publication number: 20220181621
    Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 ?m to less than 3 ?m and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.
    Type: Application
    Filed: February 23, 2022
    Publication date: June 9, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Tomooki KAWASAKI, Kenichi KOBAYASHI, Takahiro KITAGAWA
  • Patent number: 11296317
    Abstract: A method of producing a positive-electrode active material for a non-aqueous electrolyte secondary battery is provided. The method includes obtaining a precipitate containing nickel and manganese from a solution containing nickel and manganese, heat-treating the resulting precipitate at a temperature of from 850° C. to less than 1100° C. to obtain a first heat-treated product, mixing the first heat-treated product and a lithium compound, and heat-treating the resulting lithium-containing mixture at a temperature of from 550° C. to 1000° C. to obtain a second heat-treated product. The second heat-treated product contains a group of lithium transition metal composite oxide particles having an average particle diameter DSEM of from 0.5 ?m to less than 3 ?m and D50/DSEM of 1 to 2.5. The lithium transition metal composite oxide particles have a spinel structure based on nickel and manganese.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 5, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Tomooki Kawasaki, Kenichi Kobayashi, Takahiro Kitagawa
  • Publication number: 20220089457
    Abstract: A method for producing a nickel cobalt complex hydroxide includes first crystallization of supplying a solution containing Ni, Co and Mn, a complex ion forming agent and a basic solution separately and simultaneously to one reaction vessel to obtain nickel cobalt complex hydroxide particles, and a second crystallization of, after the first crystallization, further supplying a solution containing nickel, cobalt, and manganese, a solution of a complex ion forming agent, a basic solution, and a solution containing said element M separately and simultaneously to the reaction vessel to crystallize a complex hydroxide particles containing nickel, cobalt, manganese and said element M on the nickel cobalt complex hydroxide particles crystallizing a complex hydroxide particles comprising Ni, Co, Mn and the element M on the nickel cobalt complex hydroxide particles.
    Type: Application
    Filed: December 3, 2021
    Publication date: March 24, 2022
    Applicant: NICHIA CORPORATION
    Inventors: Hideki YOSHIDA, Masato SONOO, Takahiro KITAGAWA
  • Patent number: 11220438
    Abstract: A method for producing a nickel cobalt complex hydroxide includes first crystallization of supplying a solution containing Ni, Co and Mn, a complex ion forming agent and a basic solution separately and simultaneously to one reaction vessel to obtain nickel cobalt complex hydroxide particles, and a second crystallization of, after the first crystallization, further supplying a solution containing nickel, cobalt, and manganese, a solution of a complex ion forming agent, a basic solution, and a solution containing said element M separately and simultaneously to the reaction vessel to crystallize a complex hydroxide particles containing nickel, cobalt, manganese and said element M on the nickel cobalt complex hydroxide particles crystallizing a complex hydroxide particles comprising Ni, Co, Mn and the element M on the nickel cobalt complex hydroxide particles.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: January 11, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Hideki Yoshida, Masato Sonoo, Takahiro Kitagawa
  • Publication number: 20210247278
    Abstract: The present invention aims to provide core-shell particles that can be used in a method of separating a substance to be separated and that allow obtainment of a highly purified product. Each of a plurality of core-shell particles (C) of the present invention includes a core layer (P) as magnetic silica particles containing the magnetic metal oxide particles (A) and a shell layer (Q) that is a silica layer on a surface of the core layer (P), an average thickness of a plurality of shell layers (Q) being 3 to 3000 nm, wherein a weight percentage of the magnetic metal oxide particles (A) in the core layer (P) is 60 to 95 wt % based on a weight of the core layer (P), and the plurality of core-shell particles (C) have a particle size distribution with a coefficient of variation of 50% or less.
    Type: Application
    Filed: June 7, 2019
    Publication date: August 12, 2021
    Applicant: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takahiro KITAGAWA, Masumi UEDA
  • Patent number: 10929585
    Abstract: A recording medium recording a program for a process, the process includes: calculating an amount of distortion in a via of a printed circuit board based on an expression using coefficient m, ??={(L×?×?t×E)/(D×T)}×m, where ?? is the amount of distortion, L is a length of the via, ? is a thermal expansion coefficient of a base material, ?t is a temperature change of an environment, E is a Young's modulus, D is a diameter of the via, and T is a thickness of plating in the via; and calculating a lifetime of the via based on an expression, M=N/(n×365), where M is the lifetime of the via, n is a frequency of the temperature change, and N is the number of cycles of the lifetime satisfying an expression Nx=C/??.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: February 23, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Mitsunori Abe, Yoshiyuki Hiroshima, Takahiro Kitagawa, Naoki Nakamura, Akiko Matsui
  • Patent number: 10906481
    Abstract: A protector includes a case configured to accommodate a wire harness, wherein the case is provided with an insertion hole configured such that the wire harness is inserted through the insertion hole, a rib is provided on an inner surface of the case, the inner surface defining the insertion hole, and the rib protruding inwardly from the inner surface, and the rib is configured to: be fitted in a groove portion provided in an outer peripheral surface of a corrugated tube that is externally mounted on the wire harness; and hold a plug configured to close the insertion hole.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: February 2, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, Yazaki Corporation
    Inventors: Kouichi Inoue, Takahiro Kitagawa, Kunihito Ogura
  • Patent number: 10903492
    Abstract: A method of producing a nickel-cobalt composite hydroxide includes: preparing a first solution containing nickel ions and cobalt ions; preparing a second solution containing tungsten ions and having a pH of 10 or more; preparing a third solution containing a complex ion-forming factor; preparing a liquid medium having a pH in a range of 10 to 13.5; supplying the first solution, the second solution, and the third solution separately and simultaneously to the liquid medium to obtain a reacted solution having a pH in a range of 10 to 13.5; and obtaining the nickel-cobalt composite hydroxide containing nickel, cobalt, and tungsten from the reacted solution.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: January 26, 2021
    Assignee: NICHIA CORPORATION
    Inventors: Hideki Yoshida, Masato Sonoo, Takahiro Kitagawa
  • Patent number: 10863629
    Abstract: A method of manufacturing a through hole of a substrate includes forming, to the substrate, a cutting hole surrounding a removal-target-part such that a connection part of the substrate remains, the connection part that connects the removal-target-part that is removed from the substrate and a remaining part other than the removal-target-part that has been removed, along a cutting line of the through hole formed to the substrate; applying plating on an area including an inner peripheral wall face of the cutting hole of the substrate; applying a film covering an opening of the cutting hole on a surface of the substrate applied with the plating and performing exposure and development of the film to form an etching resist covering an area including the opening of the cutting hole; performing etching of the plating applied on the substrate; removing the etching resist; and cutting the connection part to remove the removal-target-part.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: December 8, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Kiyoyuki Hatanaka, Shigeru Sugino, Takahiro Kitagawa, Ryo Kanai, Nobuo Taketomi, Mitsunori Abe
  • Patent number: 10783309
    Abstract: An information processing device includes a processor that calculates a distortion amount that represents an amount of distortion generated in a via of a printed circuit board based on a following equation, ??={(L×?×?t×E)/(D×T)}×m×?×?×?; calculates a lifetime of the via based on a following equation, M=N/(n×365); changes, when the calculated lifetime is outside a first setting range, at least two design values of the via length, the thermal expansion coefficient, the Young's modulus, the via diameter, or the plating thickness within a second setting range corresponding to the at least two design values respectively; gives points of two perspectives affected by the change and outputs a graph that indicates an impact degree according to the points of the two perspectives for each combination of the at least two design values.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: September 22, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Mitsunori Abe, Yoshiyuki Hiroshima, Takahiro Kitagawa, Akiko Matsui, Naoki Nakamura
  • Patent number: 10624216
    Abstract: A wiring board includes, a base plate that has a first surface, a second surface opposite to the first surface, and a side surface coupled to the first surface and the second surface, a conductor provided on the side surface, and a protrusion provided over the side surface. The protrusion partitions the conductor into a first portion on the side surface that extends to the first surface and a second portion on the side surface that extends to the second surface. The protrusion has a solder wettability lower than the conductor and protrudes from the conductor.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: April 14, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Nobuo Taketomi, Takahiro Kitagawa, Mitsunori Abe, Shigeru Sugino, Kiyoyuki Hatanaka, Shigeo Iriguchi, Ryo Kanai
  • Publication number: 20200052296
    Abstract: A method of producing a nickel-cobalt composite hydroxide includes: preparing a first solution containing nickel ions and cobalt ions; preparing a second solution containing tungsten ions and having a pH of 10 or more; preparing a third solution containing a complex ion-forming factor; preparing a liquid medium having a pH in a range of 10 to 13.5; supplying the first solution, the second solution, and the third solution separately and simultaneously to the liquid medium to obtain a reacted solution having a pH in a range of 10 to 13.5; and obtaining the nickel-cobalt composite hydroxide containing nickel, cobalt, and tungsten from the reacted solution.
    Type: Application
    Filed: October 9, 2019
    Publication date: February 13, 2020
    Applicant: NICHIA CORPORATION
    Inventors: Hideki YOSHIDA, Masato SONOO, Takahiro KITAGAWA
  • Publication number: 20200037452
    Abstract: A method of manufacturing a through hole of a substrate includes forming, to the substrate, a cutting hole surrounding a removal-target-part such that a connection part of the substrate remains, the connection part that connects the removal-target-part that is removed from the substrate and a remaining part other than the removal-target-part that has been removed, along a cutting line of the through hole formed to the substrate; applying plating on an area including an inner peripheral wall face of the cutting hole of the substrate; applying a film covering an opening of the cutting hole on a surface of the substrate applied with the plating and performing exposure and development of the film to form an etching resist covering an area including the opening of the cutting hole; performing etching of the plating applied on the substrate; removing the etching resist; and cutting the connection part to remove the removal-target-part.
    Type: Application
    Filed: July 17, 2019
    Publication date: January 30, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Kiyoyuki Hatanaka, Shigeru Sugino, Takahiro Kitagawa, Ryo Kanai, Nobuo Taketomi, Mitsunori Abe
  • Publication number: 20200026816
    Abstract: An information processing device includes a processor that calculates a distortion amount that represents an amount of distortion generated in a via of a printed circuit board based on a following equation, ??={(L×?×?t×E)/(D×T)}×m×?×?×?; calculates a lifetime of the via based on a following equation, M=N/(n×365); changes, when the calculated lifetime is outside a first setting range, at least two design values of the via length, the thermal expansion coefficient, the Young's modulus, the via diameter, or the plating thickness within a second setting range corresponding to the at least two design values respectively; gives points of two perspectives affected by the change and outputs a graph that indicates an impact degree according to the points of the two perspectives for each combination of the at least two design values.
    Type: Application
    Filed: July 3, 2019
    Publication date: January 23, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Mitsunori Abe, YOSHIYUKI HIROSHIMA, Takahiro KITAGAWA, AKIKO MATSUI, Naoki Nakamura