Patents by Inventor Yuji Kinpara

Yuji Kinpara 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).

  • Binder for lithium ion secondary battery positive electrodes
    Patent number: 10541416
    Abstract: Provided is a binder for lithium ion secondary battery positive electrodes, which is capable of providing a positive electrode for lithium ion secondary batteries with excellent high-rate discharge characteristics. A binder for lithium ion secondary battery positive electrodes, which contains a binder resin and 500 ppm or less of an oil-soluble radical initiator.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: January 21, 2020
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Yasuhito Ushijima, Junichi Fujishige, Shun Hashimoto, Yuji Kinpara
  • Binder for use in positive electrode for lithium ion secondary battery, positive electrode for lithium ion secondary battery containing said binder, lithium ion secondary battery using said positive electrode, and electrical machinery and apparatus
    Patent number: 10164259
    Abstract: This binder for use in a positive electrode for a lithium ion secondary battery contains a copolymer of both vinyl alcohol and an alkali-metal-neutralized ethylenically unsaturated carboxylic acid.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: December 25, 2018
    Assignees: National Institute of Advanced Industrial Science and Technology, Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Takashi Mukai, Masanori Morishita, Tetsuo Sakai, Yuji Kinpara, Junichi Fujishige, Nobutaka Fujimoto, Shuichi Karashima
  • Negative-electrode mixture for non-aqueous electrolyte secondary cell, negative electrode for non-aqueous electrolyte secondary cell containing said mixture, non-aqueous electrolyte secondary cell provided with said negative electrode, and electrical device
    Patent number: 10164244
    Abstract: A negative electrode mixture for a nonaqueous electrolyte secondary cell according to the present invention includes: a negative electrode active material; a conductive assistant; and a binder. The binder contains a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: December 25, 2018
    Assignees: National Institute of Advanced Industrial Science and Technology, Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Yuji Kinpara, Junichi Fujishige, Nobutaka Fujimoto, Takashi Mukai, Masanori Morishita, Tetsuo Sakai
  • Binder for electric double-layer capacitor electrode, electric double-layer capacitor electrode comprising same binder, electric double-layer capacitor using same electrode, and electric apparatus
    Patent number: 10068717
    Abstract: A binder for an electric double-layer capacitor electrode according to the present invention includes a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: September 4, 2018
    Assignees: Sumitomo Seika Chemicals Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Yuji Kinpara, Junichi Fujishige, Nobutaka Fujimoto, Shuichi Karashima, Takashi Mukai, Tetsuo Sakai
  • BINDER FOR LITHIUM ION SECONDARY BATTERY POSITIVE ELECTRODES
    Publication number: 20180205086
    Abstract: Provided is a binder for lithium ion secondary battery positive electrodes, which is capable of providing a positive electrode for lithium ion secondary batteries with excellent high-rate discharge characteristics. A binder for lithium ion secondary battery positive electrodes, which contains a binder resin and 500 ppm or less of an oil-soluble radical initiator.
    Type: Application
    Filed: June 22, 2016
    Publication date: July 19, 2018
    Inventors: Yasuhito USHIJIMA, Junichi FUJISHIGE, Shun HASHIMOTO, Yuji KINPARA
  • DYE-SENSITIZED SOLAR CELL AND ELECTROLYSIS SOLUTION FOR DYE-SENSITIZED SOLAR CELL
    Publication number: 20180114919
    Abstract: Provided is a dye-sensitized solar cell that is non-iodine based, that has superior diffusivity of a charge-transporting material, and that has long-term stable cell performance. The dye-sensitized solar cell is provided with a semiconductor electrode including a semiconductor and a dye, a counter electrode facing the semiconductor electrode, and an electrolyte layer provided between the semiconductor electrode and the counter electrode, wherein the electrolyte layer contains a nitroxyl radical compound and a sulfone compound represented by formula (1). [In formula (1), R1 and R2 independently represent a straight-chain or branched-chain alkyl group with a carbon number of 1-12, an alkoxy group, an aromatic ring, or a halogen, or alternatively, R1 and R2 are bonded to each other to form a ring-shaped sulfone compound.
    Type: Application
    Filed: April 20, 2016
    Publication date: April 26, 2018
    Inventors: Shun HASHIMOTO, Yuki KONO, Yuji KINPARA, Koji FUJITA
  • BINDER FOR ELECTRIC DOUBLE-LAYER CAPACITOR ELECTRODE, ELECTRIC DOUBLE-LAYER CAPACITOR ELECTRODE COMPRISING SAME BINDER, ELECTRIC DOUBLE-LAYER CAPACITOR USING SAME ELECTRODE, AND ELECTRIC APPARATUS
    Publication number: 20170025230
    Abstract: A binder for an electric double-layer capacitor electrode according to the present invention includes a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.
    Type: Application
    Filed: March 19, 2015
    Publication date: January 26, 2017
    Applicants: Sumitomo Seika Chemicals Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Yuji Kinpara, Junichi Fujishige, Nobutaka Fujimoto, Shuichi Karashima, Takashi Mukai, Tetsuo Sakai
  • NEGATIVE-ELECTRODE MIXTURE FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL, NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL CONTAINING SAID MIXTURE, NON-AQUEOUS ELECTROLYTE SECONDARY CELL PROVIDED WITH SAID NEGATIVE ELECTRODE, AND ELECTRICAL DEVICE
    Publication number: 20160156024
    Abstract: A negative electrode mixture for a nonaqueous electrolyte secondary cell according to the present invention includes: a negative electrode active material; a conductive assistant; and a binder. The binder contains a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.
    Type: Application
    Filed: March 19, 2014
    Publication date: June 2, 2016
    Applicants: Sumitomo Seika Chemicals Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Yuji Kinpara, Junichi Fujishige, Nobutaka Fujimoto, Takashi Mukai, Masanori Morishita, Tetsuo Sakai
  • Radical composition and battery using same
    Patent number: 9356292
    Abstract: The present invention provides a radical composition capable of suppressing elution of electrode components in an electrolyte solution when used in an electrode for a secondary battery, and a battery using the radical composition. The present invention relates to a radical composition including a pyrroline nitroxide polymer and polyethylene glycols.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: May 31, 2016
    Assignees: SUMITOMO SEIKA CHEMICALS CO., LTD., NEC CORPORATION
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Sosuke Yamaguchi, Nobutaka Fujimoto, Yuji Kinpara, Shun Hashimoto, Shigeyuki Iwasa, Kentaro Nakahara
  • Saponification product of vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer and process for producing the same
    Patent number: 9150679
    Abstract: The present invention provides a saponification product of a vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer having superior tolerance of the aqueous thickening liquid against mechanical shear. More specifically, the present invention provides a saponification product of a vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer having the superior tolerance, by polymerizing a mixture where the molar ratio of the vinyl ester/ethylenically unsaturated carboxylic acid ester is from 8/2 to 3/7, and saponifying the obtained copolymer in a mixed solvent where the mass composition ratio of an aqueous organic solvent/water mixture solvent is from 3/7 to 8/2.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: October 6, 2015
    Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Tomoaki Yamasaki, Yuji Kinpara, Shigeki Hamamoto
  • BINDER FOR USE IN POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY CONTAINING SAID BINDER, LITHIUM ION SECONDARY BATTERY USING SAID POSITIVE ELECTRODE, AND ELECTRICAL MACHINERY AND APPARATUS
    Publication number: 20150280237
    Abstract: This binder for use in a positive electrode for a lithium ion secondary battery contains a copolymer of both vinyl alcohol and an alkali-metal-neutralized ethylenically unsaturated carboxylic acid.
    Type: Application
    Filed: October 1, 2013
    Publication date: October 1, 2015
    Inventors: Takashi Mukai, Masanori Morishita, Tetsuo Sakai, Yuji Kinpara, Junichi Fujishige, Nobutaka Fujimoto, Shuichi Karashima
  • SAPONIFICATION PRODUCT OF VINYL ESTER/ETHYLENICALLY UNSATURATED CARBOXYLIC ACID ESTER COPOLYMER AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20150125697
    Abstract: The present invention provides a saponification product of a vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer having superior tolerance of the aqueous thickening liquid against mechanical shear. More specifically, the present invention provides a saponification product of a vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer having the superior tolerance, by polymerizing a mixture where the molar ratio of the vinyl ester/ethylenically unsaturated carboxylic acid ester is from 8/2 to 3/7, and saponifying the obtained copolymer in a mixed solvent where the mass composition ratio of an aqueous organic solvent/water mixture solvent is from 3/7 to 8/2.
    Type: Application
    Filed: May 1, 2012
    Publication date: May 7, 2015
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Tomoaki Yamasaki, Yuji Kinpara, Shigeki Hamamoto
  • RADICAL COMPOSITION AND BATTERY USING SAME
    Publication number: 20140061532
    Abstract: The present invention provides a radical composition capable of suppressing elution of electrode components in an electrolyte solution when used in an electrode for a secondary battery, and a battery using the radical composition. The present invention relates to a radical composition including a pyrroline nitroxide polymer and polyethylene glycols.
    Type: Application
    Filed: March 23, 2012
    Publication date: March 6, 2014
    Applicants: WASEDA UNIVERSITY, NEC CORPORATION, SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Sosuke Yamaguchi, Nobutaka Fujimoto, Yuji Kinpara, Shun Hashimoto, Shigeyuki Iwasa, Kentaro Nakahara
  • PYRROLINE-BASED NITROXIDE POLYMER AND BATTERY USING SAME
    Publication number: 20120095179
    Abstract: The present invention provides a pyrroline nitroxide polymer, an electrode active material containing the polymer, and a cell utilizing the electrode active material. The present invention is a pyrroline nitroxide polymer obtainable by polymerization of a pyrroline nitroxide compound represented by Formula (1).
    Type: Application
    Filed: March 5, 2010
    Publication date: April 19, 2012
    Applicants: WASEDA UNIVERSITY, NEC CORPORATION, SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Hiroyuki Nishide, Kenichi Oyaizu, Takeshi Kawamoto, Nobutaka Fujimoto, Yuji Kinpara, Shigeyuki Iwasa, Kentaro Nakahara
  • Process for production of water-absorbing resin particles
    Patent number: 7713623
    Abstract: A process for producing a water-absorbent resin particle comprising subjecting a water-soluble ethylenically unsaturated monomer to a reverse phase suspension polymerization, characterized in that the process for producing a water-absorbent resin particle comprises the steps of (A) subjecting the water-soluble ethylenically unsaturated monomer to a first-step reverse phase suspension polymerization in a hydrocarbon-based solvent using a water-soluble radical polymerization initiator in the presence of a surfactant and/or a polymeric protective colloid, and optionally an internal crosslinking agent; (B) carrying out at least one step of the procedures of adding an aqueous solution of a water-soluble ethylenically unsaturated monomer containing a water-soluble radical polymerization initiator and optionally an internal crosslinking agent to a reaction mixture after the termination of the first-step reverse phase suspension polymerization in a state that the surfactant and/or the polymeric protective colloid is
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: May 11, 2010
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Kenya Matsuda, Yuji Kinpara, Tomoki Kawakita, Yasuhiro Nawata
  • Process for production of water-absorbing resin particles
    Publication number: 20060194055
    Abstract: A process for producing a water-absorbent resin particle comprising subjecting a water-soluble ethylenically unsaturated monomer to a reverse phase suspension polymerization, characterized in that the process for producing a water-absorbent resin particle comprises the steps of (A) subjecting the water-soluble ethylenically unsaturated monomer to a first-step reverse phase suspension polymerization in a hydrocarbon-based solvent using a water-soluble radical polymerization initiator in the presence of a surfactant and/or a polymeric protective colloid, and optionally an internal crosslinking agent; (B) carrying out at least one step of the procedures of adding an aqueous solution of a water-soluble ethylenically unsaturated monomer containing a water-soluble radical polymerization initiator and optionally an internal crosslinking agent to a reaction mixture after the termination of the first-step reverse phase suspension polymerization in a state that the surfactant and/or the polymeric protective colloid is
    Type: Application
    Filed: March 12, 2004
    Publication date: August 31, 2006
    Inventors: Kenya Matsuda, Yuji Kinpara, Tomoki Kawakita, Yasuhiro Nawata