Patents by Inventor Akira Yokota

Akira Yokota 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: 20240116646
    Abstract: [Object] To detect airspeed and an airflow direction with respect to an airframe of a motorized aircraft with high accuracy without increasing the cost and weight and rapidly control attitudes of an electric propulsion system and the airframe in accordance with fluctuations of the airspeed and airflow direction.
    Type: Application
    Filed: January 24, 2022
    Publication date: April 11, 2024
    Inventors: Hiroshi KOBAYASHI, Kentaro YOKOTA, Akira NISHIZAWA
  • Patent number: 11402560
    Abstract: Method for producing a thin optical laminated body. This method is a method for producing a laminated body including a polarization layer, a ?/2 layer, a ?/4 layer, a positive C layer, and a transfer adhesive layer, the laminated body including the polarization layer, the ?/2 layer and the ?/4 layer in this member-described order; including the positive C layer between the polarization layer and the ?/4 layer, or at the side of the ?/4 layer that is opposite to the ?/2-layer-arranged side of the ?/4 layer; and including the transfer adhesive layer between the polarization layer and the ?/4 layer or positive C layer, the method including the step of bonding a bonding body including a substrate and the transfer adhesive layer to an adherend through the transfer adhesive layer, and peeling the substrate from the resultant.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: August 2, 2022
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Tadahiro Kobayashi, Akira Yokota
  • Publication number: 20210116619
    Abstract: Method for producing a thin optical laminated body. This method is a method for producing a laminated body including a polarization layer, a ?/2 layer, a ?/4 layer, a positive C layer, and a transfer adhesive layer, the laminated body including the polarization layer, the ?/2 layer and the ?/4 layer in this member-described order; including the positive C layer between the polarization layer and the ?/4 layer, or at the side of the ?/4 layer that is opposite to the ?/2-layer-arranged side of the ?/4 layer; and including the transfer adhesive layer between the polarization layer and the ?/4 layer or positive C layer, the method including the step of bonding a bonding body including a substrate and the transfer adhesive layer to an adherend through the transfer adhesive layer, and peeling the substrate from the resultant.
    Type: Application
    Filed: December 7, 2020
    Publication date: April 22, 2021
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Tadahiro KOBAYASHI, Akira YOKOTA
  • Patent number: 10890702
    Abstract: Method for producing a thin optical laminated body. This method is a method for producing a laminated body including a polarization layer, a ?/2 layer, a ?/4 layer, a positive C layer, and a transfer adhesive layer, the laminated body including the polarization layer, the ?/2 layer and the ?/4 layer in this member-described order; including the positive C layer between the polarization layer and the ?/4 layer, or at the side of the ?/4 layer that is opposite to the ?/2-layer-arranged side of the ?/4 layer; and including the transfer adhesive layer between the polarization layer and the ?/4 layer or positive C layer, the method including the step of bonding a bonding body including a substrate and the transfer adhesive layer to an adherend through the transfer adhesive layer, and peeling the substrate from the resultant.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: January 12, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Tadahiro Kobayashi, Akira Yokota
  • Patent number: 10139540
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having at least two phase difference layers and having optical properties represented by the formulae (30) and (31) is provided: ?2.0?a*?0.5??(30) ?0.5?b*?5.0??(31) wherein, a* and b* represent the chromatic coordinate in the L*a*b* color system.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: November 27, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
  • Patent number: 9696475
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), the second phase difference layer has a thickness of 0.2 ?m to 2.0 ?m, and further, the optical film has optical properties represented by the formulae (1) and (2): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3).
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: July 4, 2017
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
  • Patent number: 9541691
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3) and the optical film has optical properties represented by the formulae (1), (2) and (30): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3) 0.001<|Rth(550)/Re(550)|<0.2??(30).
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: January 10, 2017
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
  • Patent number: 9529130
    Abstract: Optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer having an optical property represented by the formula (3), and the optical film has optical properties represented by the formula (1) and the formula (2). Re(450)/Re(550)?1.00(1)1.00?Re(650)/Re(550)(2)nx?ny<nz(3), wherein, Re(450) represents the in-plane phase difference value at a wavelength of 450 nm, Re(550) represents the in-plane phase difference value at a wavelength of 550 nm, and Re(650) represents the in-plane phase difference value at a wavelength of 650 nm, nx represents the principal refractive index in a direction parallel to the film plane, ny represents the refractive index in a direction parallel to the film plane and orthogonally-crossing the direction of nx, nz represents the refractive index in a direction vertical to the film plane, in an index ellipsoid formed by the phase difference layer.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: December 27, 2016
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
  • Patent number: 9442232
    Abstract: Provided is an optically anisotropic sheet that gives a thin optically anisotropic film that can be transferred to a display device. The optically anisotropic sheet includes a substrate, a liquid crystal cured film, and a sticky adhesive layer in this order. The liquid crystal cured film is a film that has a thickness of 5 ?m or less and is cured with a polymerizable liquid crystal compound aligned. The sticking force (F1) between the liquid crystal cured film and the sticky adhesive layer is greater than the substrate sticking force (F4).
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: September 13, 2016
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Tadahiro Kobayashi, Akira Yokota, Tatsuaki Kasai
  • Patent number: 9383492
    Abstract: To provide an elliptical polarization plate excellent in suppression of coloration and light leakage in display. An elliptical polarization plate having a transparent protective film pasted to one surface of a polarizer and an optically anisotropic film pasted to the other surface thereof, wherein, when measured under condition of incident polarization in the film normal direction from the side of the transparent protective film, the visibility corrected single body transmittance is 43.0% or more, the visibility corrected polarization degree is 95.0% or more, the single body hue value a* is ?2.0 to 1.0 and the single body hue value b* is ?1.0 to 5.0, and the optically anisotropic film satisfies the formulae (1), (2) and (3): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) 100<Re(550)<160??(3).
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: July 5, 2016
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki Hatanaka, Akira Yokota, Tadahiro Kobayashi, Mitsutaka Sase, Yoshifumi Komatsu
  • Publication number: 20160124131
    Abstract: In a conventional optically anisotropic film, striped unevenness parallel to the carrying direction of a substrate (the direction in which the substrate flows when the optically anisotropic film is produced in a roll-to-roll manner) is sometimes generated. In addition, when a liquid crystal cured film is transferred to a body to be transferred, uniformity of the liquid crystal cured film after transfer is sometimes also not sufficiently satisfactory. An optically anisotropic film is now formed by laminating a substrate, an orientation film and a liquid crystal cured film in this order, the substrate satisfying the following formula (A): 0<XA<dX/10??(A) wherein XA is a maximum height of the surface irregularity in the substrate, and dx represents an average thickness of the substrate.
    Type: Application
    Filed: October 27, 2015
    Publication date: May 5, 2016
    Inventors: Tadahiro KOBAYASHI, Akira YOKOTA
  • Publication number: 20150070764
    Abstract: Method for producing a thin optical laminated body. This method is a method for producing a laminated body including a polarization layer, a ?/2 layer, a ?/4 layer, a positive C layer, and a transfer adhesive layer, the laminated body including the polarization layer, the ?/2 layer and the ?/4 layer in this member-described order; including the positive C layer between the polarization layer and the ?/4 layer, or at the side of the ?/4 layer that is opposite to the ?/2-layer-arranged side of the ?/4 layer; and including the transfer adhesive layer between the polarization layer and the ?/4 layer or positive C layer, the method including the step of bonding a bonding body including a substrate and the transfer adhesive layer to an adherend through the transfer adhesive layer, and peeling the substrate from the resultant.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 12, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Tadahiro KOBAYASHI, Akira YOKOTA
  • Publication number: 20150062505
    Abstract: Provided is an optically anisotropic sheet that gives a thin optically anisotropic film that can be transferred to a display device. The optically anisotropic sheet includes a substrate, a liquid crystal cured film, and a sticky adhesive layer in this order. The liquid crystal cured film is a film that has a thickness of 5 ?m or less and is cured with a polymerizable liquid crystal compound aligned. The sticking force (El) between the liquid crystal cured film and the sticky adhesive layer is greater than the substrate sticking force (F4).
    Type: Application
    Filed: August 7, 2014
    Publication date: March 5, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Tadahiro KOBAYASHI, Akira YOKOTA, Tatsuaki KASAI
  • Publication number: 20150049291
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), the second phase difference layer has a thickness of 0.2 ?m to 2.0 ?m, and further, the optical film has optical properties represented by the formulae (1) and (2): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3).
    Type: Application
    Filed: August 7, 2014
    Publication date: February 19, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
  • Publication number: 20150042943
    Abstract: Optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer having an optical property represented by the formula (3), and the optical film has optical properties represented by the formula (1) and the formula (2). Re(450)/Re(550)?1.00(1)1.00?Re(650)/Re(550)(2)nx?ny<nz(3), wherein, Re(450) represents the in-plane phase difference value at a wavelength of 450 nm, Re(550) represents the in-plane phase difference value at a wavelength of 550 nm, and Re(650) represents the in-plane phase difference value at a wavelength of 650 nm, nx represents the principal refractive index in a direction parallel to the film plane, ny represents the refractive index in a direction parallel to the film plane and orthogonally-crossing the direction of nx, nz represents the refractive index in a direction vertical to the film plane, in an index ellipsoid formed by the phase difference layer.
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
  • Publication number: 20150043071
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3) and the optical film has optical properties represented by the formulae (1), (2) and (30): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) nx?ny<nz??(3) 0.001<|Rth(550)/Re(550)|<0.2??(30).
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
  • Publication number: 20150042942
    Abstract: To provide an elliptical polarization plate excellent in suppression of coloration and light leakage in display. An elliptical polarization plate having a transparent protective film pasted to one surface of a polarizer and an optically anisotropic film pasted to the other surface thereof, wherein, when measured under condition of incident polarization in the film normal direction from the side of the transparent protective film, the visibility corrected single body transmittance is 43.0% or more, the visibility corrected polarization degree is 95.0% or more, the single body hue value a* is ?2.0 to 1.0 and the single body hue value b* is ?1.0 to 5.0, and the optically anisotropic film satisfies the formulae (1), (2) and (3): Re(450)/Re(550)?1.00??(1) 1.00?Re(650)/Re(550)??(2) 100<Re(550)<160??(3).
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
  • Publication number: 20150042941
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), and the optical film has optical properties represented by the formulae (1), (2) and (30) is provided: ?n(450)/?n(550)?1.00??(1) 1.00??n(650)/?n(550)??(2) nx?ny<nz??(3) 0.000<T<0.1??(30).
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
  • Publication number: 20150042944
    Abstract: To provide an optical film excellent in suppression of light leakage in black display. An optical film having at least two phase difference layers and having optical properties represented by the formulae (30) and (31) is provided: ?2.0?a*?0.5??(30) ?0.5?b*?5.0??(31) wherein, a* and b* represent the chromatic coordinate in the L*a*b* color system.
    Type: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Akira YOKOTA, Tadahiro KOBAYASHI, Mitsutaka SASE, Yoshifumi KOMATSU
  • Publication number: 20130252284
    Abstract: This invention provides a novel cellulase derived from Thermosporothrix hazakensis. The cellulase derived from Thermosporothrix hazakensis has enzyme activity on at least ?-glucan, soluble cellulose, crystalline cellulose, phosphoric acid-swollen cellulose, and xylan.
    Type: Application
    Filed: May 31, 2012
    Publication date: September 26, 2013
    Applicant: Kennan Eisei Kogyo Co., Ltd.
    Inventors: Shuhei Yabe, Yoshifumi Aiba, Yasuteru Sakai, Akira Yokota