Patents by Inventor Kouichi Tanaka

Kouichi Tanaka 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: 11136648
    Abstract: This free-cutting copper alloy contains 76.0%-79.0% Cu, 3.1%-3.6% Si, 0.36%-0.84% Sn, 0.06%-0.14% P, 0.022%-0.10% Pb, with the remainder being made up of Zn and unavoidable impurities. The composition satisfies the following relations: 74.4?f1=Cu+0.8×Si?8.5×Sn+P+0.5×Pb?78.2, 61.2?f2=Cu?4.4×Si?0.7×Sn?P+0.5×Pb?62.8, 0.09?f3=P/Sn?0.35. The area ratio (%) of the constituent phases satisfies the following relations: 30???65, 0???2.0, 0???0.3, 0???2.0, 96.5?f4=?+?, 99.4?f5=?+?+?+?, 0?f6=?+??3.0, 36?f7=1.05×?+6×?1/2+0.5×??72. The ? phase is present within the ? phase, the long side of the ? phase does not exceed 50 ?m, and the long side of the ? phase does not exceed 25 ?m.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 5, 2021
    Assignee: Mitsubishi Materials Corporation
    Inventors: Keiichiro Oishi, Kouichi Suzaki, Shinji Tanaka, Yoshiyuki Goto
  • Patent number: 11042058
    Abstract: An image display device includes a wavelength conversion layer containing quantum dots and a light reflecting layer provided on an observer side with respect to the wavelength conversion layer. The light reflecting layer includes, in a reflection wavelength region, a peak wavelength of a light source that emits excitation light to be used for emission of the quantum dots. The light reflecting layer is a polarizing reflective layer.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: June 22, 2021
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventor: Kouichi Tanaka
  • Patent number: 11022732
    Abstract: The present disclosure provides an optical film for eyewear that allows, when used by a person feeling stressed, easy of production of a space having a color tone that the person psychologically feels healing, and a functional film for eyewear, an optical laminate, and eyewear that each include the optical film. The optical film for eyewear including an optical functional layer, and has that transmitted light from a light source of white light has a pale tone, is provided.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: June 1, 2021
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Saki Abe, Yoshiyuki Yahagi, Kouichi Tanaka
  • Patent number: 10942374
    Abstract: An optical film for eyewear includes a light control layer and at least one light reflection layer laminated in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the light control layer is a quarter wave plate.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: March 9, 2021
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Yoshiyuki Yahagi, Kouichi Tanaka, Saki Abe, Yuki Aikawa
  • Patent number: 10866435
    Abstract: An optical film for eyewear includes a first light control layer, at least one light reflection layer, a second light control layer, and a linear polarization element layer in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the first light control layer and the second light control layer are each a quarter wave plate.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: December 15, 2020
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Yoshiyuki Yahagi, Kouichi Tanaka, Saki Abe, Yuki Aikawa
  • Patent number: 10816709
    Abstract: A light reflection film includes at least one light reflection layer RPRL in which a cholesteric liquid crystal phase of a right-handed helical structure having right circularly polarized light reflection ability is fixed; and at least one light reflection layer LPRL in which a cholesteric liquid crystal phase of a left-handed helical structure having left circularly polarized light reflection ability is fixed. A total of three or more layers of the light reflection layer(s) RPRL and the light reflection layer(s) LPRL are laminated. The light reflection layer(s) RPRL and the light reflection layer(s) LPRL laminated each have a selective reflection center wavelength shifted by an interval of 10 nm or more and 160 nm or less between two light reflection layers adjacent to each other.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: October 27, 2020
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Tomoyuki Hayasaki, Hitoshi Asami, Yoshiyuki Yahagi, Kouichi Tanaka
  • Publication number: 20200033638
    Abstract: A light-shielding function equipped optical film for eyewear according to the present disclosure includes at least one light reflection layer including a cholesteric liquid crystal layer having a central reflected wavelength in a wavelength region of 400 nm to 500 nm inclusive. The light reflection layer is disposed on an outermost side with respect to an eyewear wearer side, and the light-shielding function equipped optical film for eyewear has a visible light average transmittance equal to or higher than 60%.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 30, 2020
    Inventors: Yoshiyuki YAHAGI, Kouichi TANAKA
  • Patent number: 10525666
    Abstract: An optical laminate structure includes a light control laminate having at least one light reflection layer, a first quarter wave plate laminated on one of surfaces of the light reflection layer, and a second quarter wave plate laminated on another surface of the light reflection layer. The light reflection layer includes a right-handed circularly polarized light reflection layer or a left-handed circularly polarized light reflection layer, and an angle formed by a polarization axis of the S-polarized light or P-polarized light incident from a position inclined from an axis perpendicular to a surface of the light control laminate by 45° or more and 65° or less and a slow axis of the first quarter wave plate on a side to which the S-polarized light or P-polarized light is incident is 5° or more and less than 45°.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: January 7, 2020
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Tomoyuki Hayasaki, Hitoshi Asami, Yoshiyuki Yahagi, Chihiro Takahashi, Kouichi Tanaka
  • Publication number: 20190391390
    Abstract: A head-up display system including an optical laminate having at least one substrate material and a half-wave plate, and a display unit that makes display light representing a display image into S-polarized light or P-polarized light and emits the S-polarized light or the P-polarized light. In the head-up display system, an angle formed by a polarization axis of the S-polarized light or the P-polarized light incident from a position inclined at not less than 45° and not more than 65° with respect to an axis perpendicular to a surface of the optical laminate and a slow axis of the half-wave plate is not less than 35° and not more than 44°.
    Type: Application
    Filed: September 9, 2019
    Publication date: December 26, 2019
    Inventors: Kouichi TANAKA, Tomoyuki HAYASAKI
  • Publication number: 20190384110
    Abstract: An image display device includes a wavelength conversion layer containing quantum dots and a light reflecting layer provided on an observer side with respect to the wavelength conversion layer. The light reflecting layer includes, in a reflection wavelength region, a peak wavelength of a light source that emits excitation light to be used for emission of the quantum dots. The light reflecting layer is a polarizing reflective layer.
    Type: Application
    Filed: August 26, 2019
    Publication date: December 19, 2019
    Inventor: Kouichi TANAKA
  • Publication number: 20190324180
    Abstract: A light reflection film includes at least one light reflection layer RPRL in which a cholesteric liquid crystal phase of a right-handed helical structure having right circularly polarized light reflection ability is fixed; and at least one light reflection layer LPRL in which a cholesteric liquid crystal phase of a left-handed helical structure having left circularly polarized light reflection ability is fixed. A total of three or more layers of the light reflection layer(s) RPRL and the light reflection layer(s) LPRL are laminated. The light reflection layer(s) RPRL and the light reflection layer(s) LPRL laminated each have a selective reflection center wavelength shifted by an interval of 10 nm or more and 160 nm or less between two light reflection layers adjacent to each other.
    Type: Application
    Filed: July 1, 2019
    Publication date: October 24, 2019
    Inventors: Tomoyuki Hayasaki, Hitoshi Asami, Yoshiyuki Yahagi, Kouichi Tanaka
  • Patent number: 10421676
    Abstract: The invention provides a bactericidal/algicidal method including adding an oxidant-based bactericidal/algicidal agent and a stabilizer therefor to a target water system, characterized in that the amount of combined chlorine or the stabilizer in the water system is controlled by generating free residual chlorine in the water system, and a bactericidal/algicidal method including adding an oxidant-based bactericidal/algicidal agent and a stabilizer therefor to a target water system, characterized in that the amount of the oxidant-based bactericidal/algicidal agent added is controlled so that the concentration of total residual chlorine in the water system falls within a predetermined range, and the amount of combined chlorine or the stabilizer is controlled so that the concentration of free residual chlorine in the water system falls within a predetermined range.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: September 24, 2019
    Assignee: KURITA WATER INDUSTRIES LTD.
    Inventors: Yutaka Yoneda, Hideo Otaka, Kouichi Tanaka, Kazuhiko Tsunoda, Naohiro Nagai, Akira Iimura
  • Patent number: 10411315
    Abstract: A battery pack structure includes a chamber, a cooling duct arranged outside the pack case, and a connector that communicates the chamber and the cooling duct with each other. The connector includes a first opening, which is connected with the chamber in a state of being sealed by a first sealing member, a second opening, which is connected with a cooling duct in a state of being sealed by a second sealing member, a first sealing surface, which is formed in a peripheral part of the first opening and is either a tube-shaped surface or a plane that faces a chamber inlet surface though the first sealing member, and a second sealing surface, which is formed in a peripheral part of the second opening and is a tube-shaped surface or a plane that faces a duct outlet surface through the second sealing member.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: September 10, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro Kosaki, Kouichi Tanaka, Takenori Kobayashi, Shigeru Fukuda, Toshiaki Naruke, Akira Azumi
  • Patent number: 10241241
    Abstract: A light controlling film comprises a light reflecting film and a light controlling layer that are laminated. The light reflecting film comprises at least two laminated light reflecting layers including at least one of light reflecting layers PRL-1 to PRL-3 that a central reflection wavelength of 400 nm-500 nm, 500 nm-600 nm, and 600 nm-700 nm, respectively, and a reflectance to ordinary light at the central reflection wavelength of 5%-25%. The at least two light reflecting layers have central reflection wavelengths that are different from each other. All of the at least two laminated light reflecting layers have a property of reflecting polarized light having the same orientation. The light controlling layer comprises two quarter wave plates, and the light reflecting film is laminated so as to be interposed between the two quarter wave plates.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: March 26, 2019
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Kouichi Tanaka, Chihiro Takahashi, Yui Yokoyama, Tomoyuki Hayasaki
  • Publication number: 20190049754
    Abstract: An optical film for eyewear includes a light control layer and at least one light reflection layer laminated in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the light control layer is a quarter wave plate.
    Type: Application
    Filed: October 5, 2018
    Publication date: February 14, 2019
    Inventors: Yoshiyuki YAHAGI, Kouichi TANAKA, Saki ABE, Yuki AIKAWA
  • Publication number: 20190033620
    Abstract: An optical film for eyewear includes a first light control layer, at least one light reflection layer, a second light control layer, and a linear polarization element layer in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the first light control layer and the second light control layer are each a quarter wave plate.
    Type: Application
    Filed: October 4, 2018
    Publication date: January 31, 2019
    Inventors: Yoshiyuki YAHAGI, Kouichi TANAKA, Saki ABE, Yuki AIKAWA
  • Publication number: 20190033498
    Abstract: A light reflection film including: a visible light reflection unit includes at least one visible light reflection layer having a reflection band in which a visible light average reflectance is higher than 25% and equal to or lower than 55% in part or all of a visible light range equal to or longer than 400 nm and shorter than 700 nm; and a light reflection layer PRL-1 having a central reflected wavelength of 700 nm to 950 nm inclusive and having a reflectance higher than 25% and equal to or lower than 55% to ordinary light at the central reflected wavelength. The visible light reflection layer and the light reflection layer PRL-1 both reflect polarized light in an identical direction.
    Type: Application
    Filed: October 1, 2018
    Publication date: January 31, 2019
    Inventors: Kouichi TANAKA, Tomoyuki HAYASAKI
  • Publication number: 20190030856
    Abstract: An optical laminate structure includes a light control laminate having at least one light reflection layer, a first quarter wave plate laminated on one of surfaces of the light reflection layer, and a second quarter wave plate laminated on another surface of the light reflection layer. The light reflection layer includes a right-handed circularly polarized light reflection layer or a left-handed circularly polarized light reflection layer, and an angle formed by a polarization axis of the S-polarized light or P-polarized light incident from a position inclined from an axis perpendicular to a surface of the light control laminate by 45° or more and 65° or less and a slow axis of the first quarter wave plate on a side to which the S-polarized light or P-polarized light is incident is 5° or more and less than 45°.
    Type: Application
    Filed: October 3, 2018
    Publication date: January 31, 2019
    Inventors: Tomoyuki HAYASAKI, Hitoshi ASAMI, Yoshiyuki YAHAGI, Chihiro TAKAHASHI, Kouichi TANAKA
  • Patent number: 10120206
    Abstract: [Problem] The present invention provides eyewear, such as polarized sunglasses, having cholesteric liquid crystal layers, wherein the eyewear has a metallic tone and antiglare properties, minimizes the reduction in light-polarizing element absorptive capability that is associated with circular polarization, and is moreover unaffected by external degrading factors such as sebum, moisture, and salt air. [Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: November 6, 2018
    Assignees: NIPPON KAYAKU KABUSHIKI KAISHA, MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.
    Inventors: Kouichi Tanaka, Yoshiyuki Yahagi, Hideyoshi Fujisawa, Takuya Gotou, Katsuyuki Murai, Kazuhisa Mitsuhata, Kyousuke Nakamura
  • Publication number: 20180267219
    Abstract: The present disclosure provides an optical film for eyewear that allows, when used by a person feeling stressed, easy of production of a space having a color tone that the person psychologically feels healing, and a functional film for eyewear, an optical laminate, and eyewear that each include the optical film. The optical film for eyewear including an optical functional layer, and has that transmitted light from a light source of white light has a pale tone, is provided.
    Type: Application
    Filed: May 17, 2018
    Publication date: September 20, 2018
    Inventors: Saki ABE, Yoshiyuki YAHAGI, Kouichi TANAKA