Patents by Inventor Kenta Aoki

Kenta Aoki 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: 11943449
    Abstract: A video decoding device for decoding video using inter prediction includes entropy decoding means for decoding an inter-PU partition type syntax; and decoding control means for making the entropy decoding means decode the inter-PU (Prediction Unit) partition type syntax of a CU (Coding Unit) to be decoded, based on whether the prediction mode of the CU to be decoded is an inter prediction mode and whether a size of the CU to be decoded is equal to a predetermined minimum inter-PU size.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: March 26, 2024
    Assignee: NEC CORPORATION
    Inventors: Kenta Senzaki, Yuzo Senda, Keiichi Chono, Hirofumi Aoki
  • Patent number: 11777097
    Abstract: The present invention is to provide a binder composition of a non-aqueous electrolyte secondary battery, which contains a vinylidene fluoride polymer and is capable of further enhancing adhesive strength of the electrode mixture layer to a surface of a current collector. The above objective can be achieved by a binder composition of a non-aqueous electrolyte secondary battery, the binder composition comprising a vinylidene fluoride copolymer for a binder of a non-aqueous electrolyte secondary battery, the vinylidene fluoride copolymer containing: a first constituent unit derived from vinylidene fluoride, and a second constituent unit containing an isocyanate group or having a structure that produces an isocyanate group when heated at 200° C. for 1 hour. This binder composition can be used in a mixture for producing an electrode for a non-aqueous electrolyte secondary battery, an electrode for a non-aqueous electrolyte secondary battery, and a non-aqueous electrolyte secondary battery.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: October 3, 2023
    Assignee: KUREHA CORPORATION
    Inventors: Kana Ashida, Kenta Aoki, Yukitaro Sakakibara, Shota Kobayashi
  • Patent number: 11594734
    Abstract: As a novel vinylidene fluoride polymer and its use, provided are a binder composition, an electrode mixture, an electrode, and a non-aqueous electrolyte secondary battery including the vinylidene fluoride containing the vinylidene fluoride polymer. The vinylidene fluoride polymer includes a first structural unit derived from vinylidene fluoride and a second structural unit derived from a monomer other than vinylidene fluoride. The monomer to be the second structural unit is a primary amine, a secondary amine, or a tertiary amine having at least one of a hydroxyl group and a carboxyl group, and the content of the second structural unit is from 0.05 to 20 mol % when the total of structural units derived from all the monomers constituting the vinylidene fluoride polymer is 100 mol %.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: February 28, 2023
    Assignee: KUREHA CORPORATION
    Inventors: Kenta Aoki, Shota Kobayashi, Kana Ashida
  • Publication number: 20220320681
    Abstract: A nonaqueous electrolyte secondary battery separator having excellent impact resistance contains a polyolefin porous film. The nonaqueous electrolyte secondary battery separator has a (200) plane peak area ratio R of not less than 0.15; the (200) plane peak area ratio R is a ratio of a peak area I(200) of a diffraction peak on a (200) plane to a peak area I(110) of a diffraction peak on a (110) plane and is calculated from a diffraction intensity profile obtained by wide-angle X-ray diffraction that is carried out by irradiating a surface of the nonaqueous electrolyte secondary battery separator with an X-ray from a direction vertical to the surface of the nonaqueous electrolyte secondary battery separator.
    Type: Application
    Filed: March 29, 2022
    Publication date: October 6, 2022
    Inventors: Takahiro MATSUO, Atsuhiro TAKATA, Kenta AOKI, Yuki YONEGUCHI
  • Patent number: 11322744
    Abstract: To provide an electrode mixture that suppresses gelling of an electrode mixture slurry and maintains a high binding capacity between an electrode active material and a current collector even after an extended period of time has elapsed since an electrode mixture slurry was produced. The electrode mixture includes: a binder composition—containing a first copolymer of vinylidene fluoride and a polar group-containing compound; and a second copolymer of vinylidene fluoride and chlorotrifluoroethylene—; and an electrode active material of lithium oxide having a pH of water when extracted with water of not less than 10.5.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: May 3, 2022
    Assignee: KUREHA CORPORATION
    Inventors: Kenta Aoki, Shoko Aoki, Shota Kobayashi, Yasuhiro Tada
  • Publication number: 20210047448
    Abstract: As a novel vinylidene fluoride polymer and its use, provided are a binder composition, an electrode mixture, an electrode, and a non-aqueous electrolyte secondary battery including the vinylidene fluoride containing the vinylidene fluoride polymer. The vinylidene fluoride polymer includes a first structural unit derived from vinylidene fluoride and a second structural unit derived from a monomer other than vinylidene fluoride. The monomer to be the second structural unit is a primary amine, a secondary amine, or a tertiary amine having at least one of a hydroxyl group and a carboxyl group, and the content of the second structural unit is from 0.05 to 20 mol % when the total of structural units derived from all the monomers constituting the vinylidene fluoride polymer is 100 mol %.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 18, 2021
    Applicant: KUREHA CORPORATION
    Inventors: Kenta AOKI, Shota KOBAYASHI, Kana ASHIDA
  • Publication number: 20200411875
    Abstract: The present invention is to provide a binder composition of a non-aqueous electrolyte secondary battery, which contains a vinylidene fluoride polymer and is capable of further enhancing adhesive strength of the electrode mixture layer to a surface of a current collector. The above objective can be achieved by a binder composition of a non-aqueous electrolyte secondary battery, the binder composition comprising a vinylidene fluoride copolymer for a binder of a non-aqueous electrolyte secondary battery, the vinylidene fluoride copolymer containing: a first constituent unit derived from vinylidene fluoride, and a second constituent unit containing an isocyanate group or having a structure that produces an isocyanate group when heated at 200° C. for 1 hour. This binder composition can be used in a mixture for producing an electrode for a non-aqueous electrolyte secondary battery, an electrode for a non-aqueous electrolyte secondary battery, and a non-aqueous electrolyte secondary battery.
    Type: Application
    Filed: November 9, 2018
    Publication date: December 31, 2020
    Applicant: Kureha Corporation
    Inventors: Kana ASHIDA, Kenta AOKI, Yukitaro SAKAKIBARA, Shota KOBAYASHI
  • Patent number: 10573891
    Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity, non-dedoping capacity, and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: February 25, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Makoto Imaji, Kenta Aoki, Yasuhiro Tada, Naohiro Sonobe, Junichi Arima, Kenichi Koyakumaru, Hideharu Iwasaki, Kiyoto Otsuka, Jiro Masuko, Hajime Komatsu, Shinya Tago
  • Publication number: 20190326602
    Abstract: To provide an electrode mixture that suppresses gelling of an electrode mixture slurry and maintains a high binding capacity between an electrode active material and a current collector even after an extended period of time has elapsed since an electrode mixture slurry was produced. The electrode mixture includes: a binder composition—containing a first copolymer of vinylidene fluoride and a polar group-containing compound; and a second copolymer of vinylidene fluoride and chlorotrifluoroethylene—; and an electrode active material of lithium oxide having a pH of water when extracted with water of not less than 10.5.
    Type: Application
    Filed: November 9, 2017
    Publication date: October 24, 2019
    Applicant: Kureha Corporation
    Inventors: Kenta AOKI, Shoko AOKI, Shota KOBAYASHI, Yasuhiro TADA
  • Patent number: 10381637
    Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: August 13, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Akira Koshima, Taketoshi Okuno, Kenichi Koyakumaru, Hideharu Iwasaki, Kenta Aoki, Makoto Imaji, Yasuhiro Tada, Naohiro Sonobe
  • Publication number: 20180269484
    Abstract: To provide a binder composition having high adhesion, without producing a copolymer or an aggregate of a copolymer and an electrode active material. A binder composition according to the present invention contains: a first vinylidene fluoride polymer with an inherent viscosity of 1.7 dL/g or higher; and a second vinylidene fluoride polymer containing acrylic acid or methacrylic acid as a monomer unit.
    Type: Application
    Filed: September 13, 2016
    Publication date: September 20, 2018
    Inventors: SHOTA KOBAYASHI, KENTA AOKI, HIROSHI SATO, YASUHIRO TADA
  • Patent number: 9947927
    Abstract: An object of the present invention is to provide a production method for suppressing the deformation of a negative electrode in the production of a negative electrode for an all-solid-state battery using turbostratic carbon and a solid electrolyte. The problem described above can be solved by a production method for a negative electrode for an all-solid-state battery comprising the steps of: (1) coating a carbonaceous material having a true density of from 1.30 g/cm3 to 2.10 g/cm3 determined by a butanol method with a solid electrolyte; and (2) pressure-molding the solid electrolyte-coated carbonaceous material.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: April 17, 2018
    Assignee: KUREHA CORPORATION
    Inventors: Kenta Aoki, Shota Kobayashi, Tatsuya Yaguchi, Hiroshi Imoto, Yasuhiro Tada, Naohiro Sonobe
  • Publication number: 20170141395
    Abstract: An object of the present invention is to provide a production method for suppressing the deformation of a negative electrode in the production of a negative electrode for an all-solid-state battery using turbostratic carbon and a solid electrolyte. The problem described above can be solved by a production method for a negative electrode for an all-solid-state battery comprising the steps of: (1) coating a carbonaceous material having a true density of from 1.30 g/cm3 to 2.10 g/cm3 determined by a butanol method with a solid electrolyte; and (2) pressure-molding the solid electrolyte-coated carbonaceous material.
    Type: Application
    Filed: March 31, 2015
    Publication date: May 18, 2017
    Inventors: KENTA AOKI, SHOTA KOBAYASHI, TATSUYA YAGUCHI, HIROSHI IMOTO, YASUHIRO TADA, NAOHIRO SONOBE
  • Publication number: 20170141380
    Abstract: An object of the present invention is to provide an all-solid battery having high energy density. The problem can be solved by a negative electrode for an all-solid battery comprising: a carbonaceous material having a true density of from 1.30 g/cm3 to 1.70 g/cm3 determined by a butanol method, a specific surface area of from 0.5 to 50.0 m2/g, an average particle size Dv50 of from 1 to 50 ?m, and a combustion peak T (° C.) according to differential thermal analysis and a butanol true density ?Bt (g/cm3) satisfying the following formula (1): 300?T?100×?Bt?570??(1) and a solid electrolyte.
    Type: Application
    Filed: March 31, 2015
    Publication date: May 18, 2017
    Applicant: Kureha Corporation
    Inventors: Kenta AOKI, Shota KOBAYASHI, Tatsuya YAGUCHI, Hiroshi IMOTO, Yasuhiro TADA, Naohiro SONOBE
  • Publication number: 20170125811
    Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity, non-dedoping capacity, and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.
    Type: Application
    Filed: January 18, 2017
    Publication date: May 4, 2017
    Applicants: KUREHA CORPORATION, KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD.
    Inventors: Makoto IMAJI, Kenta AOKI, Yasuhiro TADA, Naohiro SONOBE, Junichi ARIMA, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kiyoto OTSUKA, Jiro MASUKO, Hajime KOMATSU, Shinya TAGO
  • Publication number: 20160268590
    Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.
    Type: Application
    Filed: October 10, 2014
    Publication date: September 15, 2016
    Applicants: KURARAY CO., LTD., KURARAY CHEMICAL CO., LTD., KUREHA CORPORATION
    Inventors: Akira KOSHIMA, Taketoshi OKUNO, Kenichi KOYAKUMARU, Hideharu IWASAKI, Kenta AOKI, Makoto IMAJI, Yasuhiro TADA, Naohiro SONOBE
  • Publication number: 20150263347
    Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity (discharge capacity), non-dedoping capacity (irreversible capacity), and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor (i.e. non-graphitizable carbon precursor, graphitizable carbon, or mixture thereof) or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.
    Type: Application
    Filed: August 30, 2013
    Publication date: September 17, 2015
    Applicants: KUREHA CORPORATION, KURARAY CHEMICAL CO., LTD., KURARAY CO., LTD.
    Inventors: Makoto Imaji, Kenta Aoki, Yasuhiro Tada, Naohiro Sonobe, Junichi Arima, Kenichi Koyakumaru, Hideharu Iwasaki, Kiyoto Otsuka, Jiro Masuko, Hajime Komatsu, Shinya Tago
  • Publication number: 20150180020
    Abstract: The object of the present invention is to provide a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery which uses a plant-derived organic material as a raw material, has high purity so that alkali metals such as the potassium element are sufficiently removed by de-mineral, and has excellent cycle characteristics, and to provide a lithium ion secondary battery using the carbonaceous material. The carbonaceous material for an anode of a nonaqueous electrolyte secondary battery is a carbonaceous material obtained by carbonizing a plant-derived organic material, the atom ratio of hydrogen atoms and carbon atoms (H/C) according to elemental analysis being at most 0.1, the average particle size Dv50 being from 2 to 50 ?m, the average interlayer spacing of the 002 planes determined by X-ray diffraction being from 0.365 nm to 0.400 nm, the potassium element content being at most 0.5 mass %, the calcium element content being at most 0.
    Type: Application
    Filed: August 30, 2013
    Publication date: June 25, 2015
    Applicant: Kureha Battery Materials Japan Co., Lt.d
    Inventors: Mayu Komatsu, Yasushi Ebihara, Takashi Wakahoi, Yasuhiro Tada, Naohiro Sonobe, Mao Suzuki, Kayoko Okada, Akitoshi Hatamochi, Makoto Imaji, Yasufumi Ikeyama, Shota Kobayashi, Kenta Aoki
  • Publication number: 20120020920
    Abstract: The present invention relates to a fused ring compound represented by the following formula [I] wherein each symbol is as defined in the specification, or a pharmaceutically acceptable a salt thereof, and a hepatitis C virus (HCV) polymerase inhibitor and a therapeutic agent for hepatitis C containing this compound. The compound of the present invention shows an anti-HCV activity based on the HCV polymerase inhibitory activity, and useful as an agent for the prophylaxis or treatment of hepatitis C.
    Type: Application
    Filed: February 24, 2011
    Publication date: January 26, 2012
    Applicant: Japan Tobacco Inc.
    Inventors: Ryo Mizojiri, Shintaro Hirashima, Takahiro Oka, Kenta Aoki, Satoru Noji, Izuru Ando, Toshihiro Sato, Yasushi Niwa
  • Patent number: 7803801
    Abstract: The present invention relates to an aminopyridine compound represented by the following general formula (I) or a salt thereof and an Syk inhibitor containing the compound or a salt thereof as an active ingredient. Here, X1, X2, X3, Z, Y1, Y2 represent a carbon atom or a nitrogen atom, R, R1, R5, R6 represent a hydrogen atom, an alkyl group, etc., and R7 represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, —CpH2(p-1)(Ra1)(Ra2)—O—Ra3, —C(?O)—Rd1, a 5- or 6-membered saturated heterocyclic group, an aromatic heterocyclic group, —N(Rh1)(Rh2), etc. The aminopyridine compound of the present invention has not only high Syk inhibitory activity but also properties to selectively inhibit Syk.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: September 28, 2010
    Assignee: Japan Tobacco, Inc.
    Inventors: Yoshitoshi Kodama, Satoru Noji, Katsuaki Imamura, Ryo Mizojiri, Kenta Aoki, Hideo Takagi, Yuichi Naka, Goro Ito, Kiyotaka Shinoda, Akihito Fujiwara, Kazunori Kurihara, Masaru Tanaka