Patents by Inventor Kenji Sakai

Kenji Sakai 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: 12113330
    Abstract: A semiconductor laser device includes a semiconductor laser chip that emits laser light, a plate-like base, and a block protruding from the base and supporting the semiconductor laser chip. The block has a supporting surface and a wire bonding surface. The supporting surface faces a first side in a first direction perpendicular to the laser light emitting direction, and supports the semiconductor laser chip. The wire bonding surface is a surface to which a wire connected to the semiconductor laser chip is connected. The wire bonding surface is shifted in a second direction perpendicular to the emitting direction and the first direction with respect to the supporting surface. The wire bonding surface is inclined relative to the supporting surface, such that the wire bonding surface is more offset to a second side in the first direction with increasing distance from the supporting surface in the second direction.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: October 8, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Kenji Sakai, Kazuyoshi Izumi
  • Patent number: 12097532
    Abstract: This invention provides a method for forming a multilayer coating film, comprising applying a base paint (X) having a solids content ratio of 30 to 62 mass % to a substrate to form a base coating film having a cured film thickness of 6 to 45 ?m; applying an effect pigment dispersion (Y) having a solids content ratio of 0.1 to 10 mass % to the base coating film to form an effect coating film having a cured film thickness of 0.1 to 5.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: September 24, 2024
    Assignee: KANSAI PAINT CO., LTD.
    Inventor: Kenji Sakai
  • Publication number: 20240294779
    Abstract: A multilayer coating film-forming method including: (1) applying a photoluminescent coating material composition (Y) onto an object to be coated to form a photoluminescent coating film; (2) applying a clear coating material composition (Z) containing (z1) a hydroxyl group-containing resin and (z2) a polyisocyanate compound onto the photoluminescent coating film produced in (1) to form a clear coating film; and (3) heating, separately or simultaneously, the photoluminescent coating film formed in (1) and the clear coating film formed in (2) to cure the photoluminescent coating film and the clear coating film, the photoluminescent coating material composition (Y) containing an indium particle (y1), a surface conditioner (y2), and an organic solvent (y3), and a solid content being from 0.1 to 15 mass %.
    Type: Application
    Filed: March 28, 2022
    Publication date: September 5, 2024
    Applicant: KANSAI PAINT CO., LTD.
    Inventors: Nobuhiko NARITA, Kenji SAKAI
  • Patent number: 12054631
    Abstract: The problem to be solved by the present invention is to provide an effect pigment dispersion that exhibits excellent water resistance, that can form metallic or pearly luster, and that further exhibits high stability; and to provide a method for forming a multilayer coating film. The present invention provides an effect pigment dispersion that contains water, a wetting agent (A), a flake-effect pigment (B), and a phosphate-group-containing cellulose-based rheology control agent (C). The effect pigment dispersion has a solids content of 0.1 to 10 parts by mass, per 100 parts by mass of all of the components of the effect pigment dispersion; and has a viscosity of 100 to 10000 mPa·sec as measured with a Brookfield viscometer at a rotational speed of 6 revolutions per minute.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: August 6, 2024
    Assignee: KANSAI PAINT CO., LTD.
    Inventors: Yosuke Hasegawa, Nobuhiko Narita, Masayuki Itoh, Kenji Sakai
  • Patent number: 12043763
    Abstract: An effect paint for automobiles, comprising water, a dispersant (A), cellulose nanofibers (B), and an effect pigment (C).
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: July 23, 2024
    Assignee: KANSAI PAINT CO., LTD.
    Inventors: Kenji Sakai, Nobuhiko Narita
  • Patent number: 12040590
    Abstract: A semiconductor laser device A1 comprises a semiconductor laser chip 2 and a stem 1. The stem 1 includes a base 11 and leads 3A, 3B, and 3C fixed to the base, and supports the semiconductor laser chip 2. The semiconductor laser device A1 further comprises a first metal layer 15 including a first layer 151 covering the base 11 and the leads 3A, 3B, and 3C, a second layer 152 interposed between the first layer 151 and each of the base 11 and the leads 3A, 3B, and 3C, and a third layer 153 interposed between the second layer 152 and each of the base 11 and the leads 3A, 3B, and 3C. Crystal grains in the second layer 152 are smaller than crystal grains in the third layer 153. Such a configuration can suppress corrosion.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: July 16, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Hiroyuki Tajiri, Kenji Sakai, Kazuyoshi Izumi
  • Patent number: 11932781
    Abstract: The present invention provides an effect pigment dispersion that contains water, a wetting agent (A), a flake-effect pigment (B), and specific cellulose nanofibers (C). The effect pigment dispersion has a solids content of 0.1 to 10 parts by mass, per 100 parts by mass of all of the components of the effect pigment dispersion; and has a viscosity of 100 to 10000 mPa·sec as measured with a Brookfield viscometer at a rotational speed of 6 revolutions per minute.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: March 19, 2024
    Assignee: KANSAI PAINT CO., LTD.
    Inventors: Kenji Sakai, Nobuhiko Narita
  • Patent number: 11898078
    Abstract: A semiconductor phosphor configured to exhibit photoluminescence upon irradiation with excitation light, including: at least one active layer made of a compound semiconductor and containing an n-type or p-type dopant; and at least two barrier layers made of a compound semiconductor and having a larger band gap than the active layer. The active layer and the barrier layers are alternately stacked. This provides a semiconductor phosphor which allows easy wavelength adjustment, high efficiency and stability.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: February 13, 2024
    Assignee: SHIN-ETSU HANDOTAI CO., LTD.
    Inventors: Susumu Higuchi, Kenji Sakai, Masato Yamada, Masanobu Takahashi, Junya Ishizaki
  • Publication number: 20230358485
    Abstract: Clamping device 20 is a clamping device for clamping and fixing core 10, whose interior is divided into multiple flow channels F1, F2 by plates 11 that are stacked, of stacked heat exchanger 1 in stacking direction Z of plates 11, including: two end plates 21, 22 placed on both sides of core 10 in stacking direction Z; connecting member 23 connecting two end plates 21, 22 to keep two end plates 21, 22 apart by a distance greater than a length of core 10 in stacking direction Z; and bolts 24 inserted respectively into thread through-holes 21a, 22a formed on each of end plates 21, 22 for pressing core 10 in stacking direction Z.
    Type: Application
    Filed: August 26, 2021
    Publication date: November 9, 2023
    Applicant: TOYO ENGINEERING CORPORATION
    Inventors: Takeshi SATO, Satoshi NAGATA, Kenji SAKAI
  • Publication number: 20230303856
    Abstract: An effect pigment dispersion containing a wetting agent (A), a flake-effect pigment (B), a sulfonic acid-modified cellulose nanofiber (C), and water (D), the effect pigment dispersion containing a solid content of 0.1 to 10 parts by mass per 100 parts by mass of a total of all components of the effect pigment dispersion.
    Type: Application
    Filed: May 17, 2021
    Publication date: September 28, 2023
    Applicant: KANSAI PAINT CO., LTD.
    Inventors: Nobuhiko NARITA, Kenji SAKAI
  • Publication number: 20230278071
    Abstract: An object to be solved by the present invention is to provide a multilayer coating film forming method by which a multilayer coating film having reduced nonuniformity and exhibiting excellent luster and high flip-flop properties can be formed. The present invention provides a multilayer coating film forming method characterized by including: applying an aqueous first colored paint (X) containing a color pigment (x1) and an effect pigment (x2) on an object to be coated to form a first colored coating film; applying an aqueous second colored paint (Y) containing a viscosity modifier (y1), a color pigment (y2), and an effect pigment (y3) to form a second colored coating film; applying a clear paint (Z) to form a clear coating film; and curing by heating, wherein a solid content of the aqueous second colored paint (Y) is in a range of 0.
    Type: Application
    Filed: July 6, 2021
    Publication date: September 7, 2023
    Applicant: KANSAI PAINT CO., LTD.
    Inventor: Kenji SAKAI
  • Publication number: 20230108182
    Abstract: A method for forming a multilayer coating film, comprising the steps of applying a color paint (W) to a substrate to form a colored coating film; applying an effect pigment dispersion (X) to the colored coating film, wherein the effect pigment dispersion (X) contains an effect pigment (x2), and the content of the effect pigment (x2) in the effect pigment dispersion (X) is within a range of 15 to 80 parts by mass, based on 100 parts by mass of the total solids content in the effect pigment dispersion (X), to form an effect first base coating film; applying a transparent colored second base paint (Y) containing a color pigment (y2) to form a transparent colored second base coating film; and applying a clear paint (Z) to form a clear coating film, wherein the clear paint (Z) contains a hydroxy-containing acrylic resin (z1) and an aliphatic triisocyanate compound (z2-1) having a molecular weight within a range of 200 to 350.
    Type: Application
    Filed: March 24, 2021
    Publication date: April 6, 2023
    Applicant: KANSAI PAINT CO., LTD.
    Inventors: Kenji SAKAI, Nobuhiko NARITA
  • Publication number: 20220403204
    Abstract: The present invention addresses the problem of providing an aqueous paint composition that has a relatively high solid content ratio and that is capable of forming a coating film having excellent brilliance. The present invention provides an aqueous paint composition that contains (A) a water-dispersible hydroxy-containing acrylic resin, (B) a flake-effect pigment, and (C) a water-dispersible cellulose-based rheology control agent, wherein the content of the flake-effect pigment (B) is within a range of 1 to 50 parts by mass based on 100 parts by mass of the resin solids content in the aqueous paint composition, and the aqueous paint composition has a solids content of more than 10 mass % and 35 mass % or less.
    Type: Application
    Filed: November 11, 2020
    Publication date: December 22, 2022
    Applicant: KANSAI PAINT CO., LTD.
    Inventors: Kenji SAKAI, Nobuhiko NARITA
  • Publication number: 20220355338
    Abstract: This invention provides a method for forming a multilayer coating film, comprising applying a base paint (X) having a solids content ratio of 30 to 62 mass % to a substrate to form a base coating film having a cured film thickness of 6 to 45 ?m; applying an effect pigment dispersion (Y) having a solids content ratio of 0.1 to 10 mass % to the base coating film to form an effect coating film having a cured film thickness of 0.1 to 5.
    Type: Application
    Filed: September 10, 2020
    Publication date: November 10, 2022
    Applicant: KANSAI PAINT CO., LTD.
    Inventor: Kenji SAKAI
  • Publication number: 20220348773
    Abstract: An effect paint for automobiles, comprising water, a dispersant (A), cellulose nanofibers (B), and an effect pigment (C).
    Type: Application
    Filed: June 17, 2020
    Publication date: November 3, 2022
    Applicant: KANSAI PAINT CO., LTD.
    Inventors: Kenji SAKAI, Nobuhiko NARITA
  • Patent number: 11285509
    Abstract: A method for forming a multilayer coating film, the method including the following steps (1) to (3): (1) applying a colored paint (X) to a substrate to form a colored coating film whose lightness L* value in the L*a*b* color space is 5 or less, (2) applying an effect pigment dispersion (Y) to the colored coating film formed in step (1) to form an effect coating film, and (3) applying a clear paint (Z) to the effect coating film formed in step (2) to form a clear coating film, wherein the effect pigment dispersion (Y) contains water, a rheology control agent (A), and a flake-effect pigment (B), the flake-effect pigment (B) being an effect pigment in which a transparent or translucent base material is coated with a metal oxide, and the effect pigment dispersion (Y) having a solids content of 0.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: March 29, 2022
    Assignee: KANSAI PAINT CO., LTD.
    Inventors: Hirokazu Okazaki, Tatsuo Kuramochi, Kenji Sakai, Nobuhiko Narita
  • Publication number: 20210348004
    Abstract: The present invention provides an effect pigment dispersion that contains water, a wetting agent (A), a flake-effect pigment (B), and specific cellulose nanofibers (C). The effect pigment dispersion has a solids content of 0.1 to 10 parts by mass, per 100 parts by mass of all of the components of the effect pigment dispersion; and has a viscosity of 100 to 10000 mPa·sec as measured with a Brookfield viscometer at a rotational speed of 6 revolutions per minute.
    Type: Application
    Filed: September 24, 2019
    Publication date: November 11, 2021
    Applicant: KANSAI PAINT CO., LTD.
    Inventors: Kenji SAKAI, Nobuhiko NARITA
  • Publication number: 20210336410
    Abstract: A semiconductor laser device A1 comprises a semiconductor laser chip 2 and a stem 1. The stem 1 includes a base 11 and leads 3A, 3B, and 3C fixed to the base, and supports the semiconductor laser chip 2. The semiconductor laser device A1 further comprises a first metal layer 15 including a first layer 151 covering the base 11 and the leads 3A, 3B, and 3C, a second layer 152 interposed between the first layer 151 and each of the base 11 and the leads 3A, 3B, and 3C, and a third layer 153 interposed between the second layer 152 and each of the base 11 and the leads 3A, 3B, and 3C. Crystal grains in the second layer 152 are smaller than crystal grains in the third layer 153. Such a configuration can suppress corrosion.
    Type: Application
    Filed: September 24, 2019
    Publication date: October 28, 2021
    Inventors: Hiroyuki TAJIRI, Kenji SAKAI, Kazuyoshi IZUMI
  • Publication number: 20210269666
    Abstract: An actinic energy ray-curable composition contains a low-refractive-index material capable of dissolving in a general-purpose solvent and that can impart excellent scratch resistance to a surface of its cured coating film, and a cured film and an antireflection film thereof. An actinic energy ray-curable composition contains a poly(perfluoroalkylene ether) chain-containing actinic energy ray-curable polyfunctional compound (I) and an actinic energy ray-curable compound (II) that is a copolymer of polymerizable unsaturated monomers, the actinic energy ray-curable compound (II) having a side chain containing a fluorinated alkyl group (x) having 1 to 6 carbon atoms to which a fluorine atom is attached and a side chain containing an actinic energy ray-curable group (y), the actinic energy ray-curable compound (II) having a silicone chain (z) with a molecular weight of 2,000 or more at one end of the copolymer, and a cured film and an antireflection film obtained by curing the composition.
    Type: Application
    Filed: June 25, 2019
    Publication date: September 2, 2021
    Applicant: DIC Corporation
    Inventors: Miki Ota, Ryosuke Hashide, Kazuki Obi, Nobuyuki Koike, Kenji Sakai
  • Publication number: 20210265812
    Abstract: A semiconductor laser device includes a semiconductor laser chip that emits laser light, a plate-like base, and a block protruding from the base and supporting the semiconductor laser chip. The block has a supporting surface and a wire bonding surface. The supporting surface faces a first side in a first direction perpendicular to the laser light emitting direction, and supports the semiconductor laser chip. The wire bonding surface is a surface to which a wire connected to the semiconductor laser chip is connected. The wire bonding surface is shifted in a second direction perpendicular to the emitting direction and the first direction with respect to the supporting surface. The wire bonding surface is inclined relative to the supporting surface, such that the wire bonding surface is more offset to a second side in the first direction with increasing distance from the supporting surface in the second direction.
    Type: Application
    Filed: September 19, 2019
    Publication date: August 26, 2021
    Inventors: Kenji SAKAI, Kazuyoshi IZUMI