Patents by Inventor Keisuke Okada

Keisuke Okada 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: 11951728
    Abstract: A fiber-reinforced plastic molded body includes: a laminated body having a configuration of laminating a sandwich structure member obtained by laminating one layer or two or more layers of a unidirectional fiber-reinforced resin constituted from a unidirectional continuous fiber and a matrix resin on both surfaces of a core layer and one layer or two or more layers of a woven fiber-reinforced resin constituted from a woven fiber and a matrix resin such that the one layer or two or more layers of a woven fiber-reinforced resin are disposed on the design surface side of the unidirectional fiber-reinforced resin; and the resin member is not substantially exposed in a projection plane from the woven fiber-reinforced resin side.
    Type: Grant
    Filed: March 11, 2021
    Date of Patent: April 9, 2024
    Assignee: Toray Industries, Inc.
    Inventors: Keisuke Shiozaki, Kenya Okada, Yuji Fukunishi
  • Publication number: 20240103311
    Abstract: Provided are a liquid crystal panel which has good visibility and in which a decrease in the display quality is sufficiently suppressed, and a head mounted display and a liquid crystal display device using the same. The liquid crystal panel includes a liquid crystal layer, a spacer, and a light-shielding section between a first substrate a second substrate facing the first substrate. The light-shielding section includes column-direction light-shielding sections arranged in a column direction and shielding parts between the pixels aligned in a row direction from light, and row-direction light-shielding sections arranged in the row direction and shielding parts between the pixels aligned in the column direction from light. The row-direction light-shielding sections include one that includes a first light-shielding section including an arrangement region of the spacer and a second light-shielding section adjacent to the first light-shielding section in the column direction.
    Type: Application
    Filed: August 14, 2023
    Publication date: March 28, 2024
    Inventors: Seiichi UCHIDA, Kuniaki OKADA, Keisuke YOSHIDA
  • Publication number: 20240101818
    Abstract: There is provided an aqueous heat-sealable resin composition which enables a laminate to have excellent heat sealing strength and blocking resistance. The disclosure relates to an aqueous heat-sealable resin composition which contains a urethane resin (A) which is a product of reaction components including a polyether polyol (a1), a polyisocyanate (a2) and a chain extender (a3) or the urethane resin (A) and a wax (B), and a laminate having a coating of the composition on at least one surface of a substrate.
    Type: Application
    Filed: September 21, 2023
    Publication date: March 28, 2024
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Mayu Matsumoto, Teruaki Sato
  • Publication number: 20230400671
    Abstract: A zoom lens includes: a first lens group having negative refractive power and a subsequent group in order from an object side to an image side. The subsequent group includes, in order from an object side to an image side, a Gp1 group including one or more lens groups and having positive refractive power as a whole, a Gn1 group including one or more lens groups and having negative refractive power as a whole, a Gp2 group including one or more lens groups and having positive refractive power as a whole, and a Gn2 group including one or more lens groups and having negative refractive power as a whole. An aperture diaphragm is disposed closer to an object side than the Gp2 group, an interval between adjacent lens groups changes at least during one of zooming and focusing, and a predetermined expression is satisfied.
    Type: Application
    Filed: May 22, 2023
    Publication date: December 14, 2023
    Applicant: Tamron Co., Ltd.
    Inventor: Keisuke OKADA
  • Publication number: 20230077630
    Abstract: A water-based composition for barrier containing a urethane resin (A) which is comprising a polyol (a1), a polyisocyanate (a2) and a chain extender (a3) as essential reaction components, and at least one wax (B) selected from the group consisting of a paraffin, a carnauba and an alkyl ketene dimer, and further a content ratio between the component (A) and the component (B) in terms of the non-volatile content weight is (A)/(B)=25/75 to 95/5.
    Type: Application
    Filed: August 23, 2022
    Publication date: March 16, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Kaito Kuroda, Teruaki Sato
  • Publication number: 20230084251
    Abstract: The present disclosure provides a heat sealing aqueous resin composition containing: a rosin resin (A); a biodegradable resin (B) including a resin having a structure of General Formula (1) and/or a resin (b1) having a structure of General Formula (2); and a polyvinyl alcohol (C) in which an average saponification degree is 75 mol % or more and 85 mol % or less, in which a content of the component (b1) is more than 50% by mass when a total content of the component (A) and the component (B) is 100% by mass.
    Type: Application
    Filed: August 24, 2022
    Publication date: March 16, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Kaito Kuroda, MAYU MATSUMOTO, Teruaki Sato
  • Publication number: 20230002975
    Abstract: Provided is a powdery paper-strengthening agent comprising an amphoteric (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 7,000,000, wherein the amphoteric (meth)acrylamide-based polymer (A) comprises, as constituent monomers, (meth)acrylamide which is an (a1) component, a cationic unsaturated monomer which is an (a2) component, an anionic unsaturated monomer which is an (a3) component, and a crosslinkable unsaturated monomer which is an (a4) component, and wherein an aqueous solution, in which the amphoteric (meth)acrylamide-based polymer (A) is dissolved in a calcium chloride aqueous solution having an electrical conductivity of 4 mS/cm at 25° C. so as to be 1% by weight, has a maximum turbidity of 10 to 2500 NTU at pH 3 to 9.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 5, 2023
    Inventors: Keisuke Okada, Hiroyuki Ioka, Daisuke Fujioka
  • Publication number: 20220396712
    Abstract: A water-based oil resistant agent containing at least one resin (A) selected from the group consisting of the following (A1) and (A2), and a paraffin wax (B): (A1) an olefin resin which is a polymer containing monoolefins having a total number of carbon atoms of 4 or more (a1-1) and an ?,?-unsaturated carboxylic acid (a1-2) as essential reaction components; and (A2) a urethane resin which is a polymer containing a polyol (a2-1), a polyisocyanate (a2-2) and a chain extender (a2-3) as essential reaction components.
    Type: Application
    Filed: June 7, 2022
    Publication date: December 15, 2022
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Takashi Minabe, Kosuke Tsuji
  • Publication number: 20220169767
    Abstract: A powdery paper-strengthening agent, comprising a branched (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 8,000,000 and a molecular weight distribution of 1.4 to 3.0, wherein the branched (meth)acrylamide-based polymer (A) comprises, as constituent monomers, a (meth)acrylamide (a1), a crosslinkable unsaturated monomer (a2), and at least one of a cationic unsaturated monomer (a3) and an anionic unsaturated monomer (a4), and wherein a content of unreacted (a1) component is 1,000 ppm or less.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 2, 2022
    Applicant: Arakawa Chemical Industries, Ltd.
    Inventors: Shogo NISHIURA, Daisuke FUJIOKA, Keisuke OKADA
  • Patent number: 11194108
    Abstract: A slot type optical cable includes: an optical fiber; a slot rod that includes a plurality of ribs forming a groove in which the optical fiber is accommodatable; and a cable jacket that is provided around the slot rod. The cable jacket includes a sheath portion that is formed around the slot rod at substantially the same thickness by linearly connecting outermost peripheral edges of adjacent ribs.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: December 7, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Fumiaki Sato, Yoshiaki Nagao
  • Patent number: 10935772
    Abstract: A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: March 2, 2021
    Assignee: Tamron Co., Ltd.
    Inventors: Yoshito Iwasawa, Hisayuki Yamanaka, Keisuke Okada, Junichi Yamazoe
  • Patent number: 10923241
    Abstract: A concrete cask enabling suppression of occurrence of stress corrosion cracking (SCC) in a lid welded part of a canister. The concrete cask includes: a metal canister accommodating spent fuel; a concrete container body for accommodating the canister inside the container body; a cooling passage provided between the external peripheral surface of the canister and the internal peripheral surface of the container body, and allowing air for cooling the external peripheral surface of the canister to pass; and a top space provided between the top surface part of the canister, and the inside of a lid of the container body. A baffle plate for suppressing introduction of air rising through the cooling passage to the top space is provided.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: February 16, 2021
    Assignee: Hitachi Zosen Corporation
    Inventors: Hiroaki Arai, Keisuke Okada, Masanori Goto
  • Patent number: 10750148
    Abstract: An unevenness correction system according to the present invention includes a panel drive circuit provided with a gamma correction circuit that performs gamma correction on an image signal input to an input interface, a gamma correction information acquisition circuit that acquires a gamma correction signal obtained through gamma correction as gamma correction information, an unevenness correction circuit that performs an unevenness correction on the gamma correction signal based on correction data, and an output interface that externally outputs the gamma correction information, and an unevenness correction apparatus provided with a pattern generator that outputs the image signal of a predetermined image to the input interface, and a control unit that generates correction data based on gamma correction information of each individual display panel input to and read by a gamma correction information reading unit from the output interface regarding the output image signal.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: August 18, 2020
    Assignee: IIX INC.
    Inventors: Makoto Hatakenaka, Takashi Sakamoto, Keisuke Okada
  • Publication number: 20200218021
    Abstract: A slot type optical cable includes: an optical fiber; a slot rod that includes a plurality of ribs forming a groove in which the optical fiber is accommodatable; and a cable jacket that is provided around the slot rod.
    Type: Application
    Filed: June 13, 2018
    Publication date: July 9, 2020
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Keisuke OKADA, Fumiaki SATO, Yoshiaki NAGAO
  • Patent number: 10627609
    Abstract: The present invention provides a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group has at least two cemented surfaces having negative refractive power, convex lenses GpH and GpL satisfying predetermined conditional expressions. An aperture stop is arranged in the first lens group or after. The zoom lens satisfies predetermined conditional expressions.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: April 21, 2020
    Assignee: Tamron Co., Ltd.
    Inventor: Keisuke Okada
  • Patent number: 10606044
    Abstract: An object of the present invention is to provide a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G1; a negative second lens group G2; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group includes convex lenses GpH and GpL satisfying predetermined conditional expressions. The convex lens GpH is the positive lens which is arranged second position or after from the object side in positive lenses in the GR group.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: March 31, 2020
    Assignee: Tamron Co., Ltd.
    Inventor: Keisuke Okada
  • Patent number: 10585255
    Abstract: An intermittent-connection-type optical fiber ribbon includes: a plurality of optical fiber core wires that are disposed in parallel; a connecting resin that is coated on surfaces of the plurality of optical fiber core wires; and slits that are provided intermittently in the connecting resin partially between the optical fiber core wires in a longitudinal direction, and a marking is on the connecting resin.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: March 10, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki Sato, Keisuke Okada, Yoshiaki Nagao, Nobuyuki Suzuki, Yuuki Shimoda
  • Publication number: 20200035371
    Abstract: A concrete cask enabling suppression of occurrence of stress corrosion cracking (SCC) in a lid welded part of a canister. The concrete cask includes: a metal canister accommodating spent fuel; a concrete container body for accommodating the canister inside the container body; a cooling passage provided between the external peripheral surface of the canister and the internal peripheral surface of the container body, and allowing air for cooling the external peripheral surface of the canister to pass; and a top space provided between the top surface part of the canister, and the inside of a lid of the container body. A baffle plate for suppressing introduction of air rising through the cooling passage to the top space is provided.
    Type: Application
    Filed: September 26, 2017
    Publication date: January 30, 2020
    Applicant: Hitachi Zosen Corporation
    Inventors: Hiroaki ARAI, Keisuke OKADA, Masanori GOTO
  • Patent number: 10514517
    Abstract: Provided is an optical fiber cable whereby macrobend loss can be suppressed even when ribbons are mounted at high density in grooves. An optical fiber cable provided with optical units in which ribbons each having a plurality of optical fiber cores arranged in parallel are collected, a slot rod having a plurality of grooves for accommodating optical units, a tension member on which tension is applied, and a cable jacket for covering the outside of the slot rod. Each of the optical units is accommodated in the corresponding groove in a stranded state, and the occupancy of the optical units calculated from the cross-sectional area of the optical units with respect to the cross-sectional area of the groove is 25% to 65%.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: December 24, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Fumiaki Sato, Keisuke Okada, Yoshiaki Nagao, Kenta Tsuchiya, Nobuyuki Suzuki
  • Patent number: D927376
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: August 10, 2021
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Keisuke Okada