Patents by Inventor Koichiro Asazawa

Koichiro Asazawa 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: 10947339
    Abstract: Provided are an anion exchange resin being capable of producing an electrolyte membrane for a fuel cell, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer, which have an improved physical property (anion conductivity); a method for producing thereof; an electrolyte membrane for a fuel cell, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer produced from the anion exchange resin; and a fuel cell having the electrolyte membrane or the electrode catalyst layer.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: March 16, 2021
    Assignees: UNIVERSITY OF YAMANASHI, TAKAHATA PRECISION CO., LTD.
    Inventors: Kenji Miyatake, Junpei Miyake, Hideaki Ono, Manai Shimada, Naoki Yokota, Natsumi Yoshimura, Koichiro Asazawa, Eriko Nishino
  • Patent number: 10734663
    Abstract: An anion exchange resin capable of producing an electrolyte membrane, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer, which have improved chemical properties and mechanical properties; an electrolyte membrane and a binder for forming an electrode catalyst layer produced from the anion exchange resin; and a fuel cell having the electrolyte membrane or the electrode catalyst layer.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: August 4, 2020
    Assignees: UNIVERSITY OF YAMANASHI, TAKAHATA PRECISION CO., LTD.
    Inventors: Kenji Miyatake, Junpei Miyake, Hideaki Ono, Manai Shimada, Naoki Yokota, Natsumi Yoshimura, Aoi Takano, Koichiro Asazawa, Eriko Nishino, Yui Kuwabara
  • Patent number: 10727515
    Abstract: An anion exchange resin capable of producing an electrolyte membrane, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer, which have improved electrical properties; an electrolyte membrane and a binder for forming an electrode catalyst layer produced from the anion exchange resin; and a fuel cell having the electrolyte membrane or the electrode catalyst layer.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: July 28, 2020
    Assignees: UNIVERSITY OF YAMANASHI, TAKAHATA PRECISION CO., LTD.
    Inventors: Kenji Miyatake, Junpei Miyake, Hideaki Ono, Manai Shimada, Naoki Yokota, Natsumi Yoshimura, Aoi Takano, Koichiro Asazawa, Eriko Nishino, Yui Kuwabara
  • Publication number: 20200230590
    Abstract: Provided are an anion exchange resin being capable of producing an electrolyte membrane, a binder for forming an electrode catalyst layer and a battery electrode catalyst layer, which have improved electrical properties and chemical properties. For example, used is an anion exchange resin which has a hydrophobic unit being composed of bisphenol AF residues repeated via carbon-carbon bond and a hydrophilic unit being composed of hydrophilic groups repeated via carbon-carbon bond, in which the hydrophilic group is formed by connecting an anion exchange group to a fluorene backbone via a divalent saturated hydrocarbon group, and in which the hydrophobic unit and the hydrophilic unit are connected via carbon-carbon bond.
    Type: Application
    Filed: November 20, 2019
    Publication date: July 23, 2020
    Applicants: University Of Yamanashi, Takahata Precision Co., Ltd.
    Inventors: Kenji MIYATAKE, Junpei Miyake, Taro Kimura, Naoki Yokota, Katsuya Nagase, Yousuke Konno, Koichiro Asazawa, Aoi Takano, Takeshi Kato
  • Publication number: 20200061599
    Abstract: Provided are an anion exchange resin being capable of producing an electrolyte membrane and the like, which have improved chemical properties (durability). For example, used is an anion exchange resin comprising a hydrophobic unit being composed of a plurality of divalent hydrophobic groups repeated via carbon-carbon bond, the divalent hydrophobic group having a plurality of aromatic rings which are connected to each other via a divalent fluorine-containing group; and a hydrophilic unit being composed of a plurality of hydrophilic groups repeated via carbon-carbon bond, the hydrophilic groups being composed of a plurality of aromatic rings which are connected to each other via a divalent hydrocarbon group and/or carbon-carbon bond, and the hydrophilic groups containing an anion exchange group-containing group including a quaternary ammonium salt having a piperidine ring, and wherein the hydrophobic unit and the hydrophilic unit are connected via carbon-carbon bond.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 27, 2020
    Applicants: University Of Yamanashi, Takahata Precision Co., Ltd., Daihatsu Motor Co., Ltd.
    Inventors: Kenji MIYATAKE, Junpei Miyake, Naoki Yokota, Katsuya Nagase, Aoi Takano, Takeshi Kato, Koichiro Asazawa
  • Patent number: 10522843
    Abstract: A supported bi-metallic non-platinum catalyst that is capable of oxidizing hydrazine to produce, as by-products of energy production, nitrogen, water, and zero or near-zero levels of ammonia is described. The catalyst is suitable for use in fuel cells, particularly those that utilizes an anion-exchange membrane and a liquid fuel such as hydrazine.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: December 31, 2019
    Assignee: STC. UNM
    Inventors: Alexey Serov, Plamen B Atanassov, Tomokazu Sakamoto, Hirohisa Tanaka, Koichiro Asazawa
  • Patent number: 10287409
    Abstract: The present invention provides an anion exchange resin capable of producing an electrolyte membrane for a fuel cell, a binder for forming an electrode catalyst layer and a battery electrode catalyst layer. The anion exchange resin of the present invention has a hydrophobic unit, a hydrophilic unit and divalent fluorine-containing groups. The hydrophobic unit has divalent hydrophobic groups composed of one aromatic ring or a plurality of aromatic rings that are repeated via carbon-carbon bond. The hydrophilic unit has divalent hydrophilic groups composed of one aromatic ring or a plurality of aromatic rings, at least one of which has an anion exchange group, that are repeated via carbon-carbon bond. The divalent fluorine-containing groups have a specific structure and are bonded via carbon-carbon bond to the hydrophobic unit and/or the hydrophilic unit and/or a moiety other than these units.
    Type: Grant
    Filed: August 22, 2015
    Date of Patent: May 14, 2019
    Assignees: TAKAHATA PRECISION JAPAN CO., LTD., UNIVERSITY OF YAMANASHI
    Inventors: Manai Shimada, Naoki Yokota, Kenji Miyatake, Masahiro Watanabe, Junpei Miyake, Hideaki Ono, Eriko Nishino, Koichiro Asazawa
  • Publication number: 20190027768
    Abstract: An anion exchange resin capable of producing an electrolyte membrane, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer, which have improved electrical properties; an electrolyte membrane and a binder for forming an electrode catalyst layer produced from the anion exchange resin; and a fuel cell having the electrolyte membrane or the electrode catalyst layer.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 24, 2019
    Applicants: UNIVERSITY OF YAMANASHI, TAKAHATA PRECISION JAPAN CO., LTD.
    Inventors: Kenji MIYATAKE, Junpei MIYAKE, Hideaki ONO, Manai SHIMADA, Naoki YOKOTA, Natsumi YOSHIMURA, Aoi TAKANO, Koichiro ASAZAWA, Eriko NISHINO, Yui KUWABARA
  • Publication number: 20190027767
    Abstract: An anion exchange resin capable of producing an electrolyte membrane, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer, which have improved chemical properties and mechanical properties; an electrolyte membrane and a binder for forming an electrode catalyst layer produced from the anion exchange resin; and a fuel cell having the electrolyte membrane or the electrode catalyst layer.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 24, 2019
    Applicants: UNIVERSITY OF YAMANASHI, TAKAHATA PRECISION JAPAN CO., LTD.
    Inventors: Kenji MIYATAKE, Junpei MIYAKE, Hideaki ONO, Manai SHIMADA, Naoki YOKOTA, Natsumi YOSHIMURA, Aoi TAKANO, Koichiro ASAZAWA, Eriko NISHINO, Yui KUWABARA
  • Publication number: 20180265626
    Abstract: Provided are an anion exchange resin being capable of producing an electrolyte membrane for a fuel cell, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer, which have an improved physical property (anion conductivity); a method for producing thereof; an electrolyte membrane for a fuel cell, a binder for forming an electrode catalyst layer and a fuel cell electrode catalyst layer produced from the anion exchange resin; and a fuel cell having the electrolyte membrane or the electrode catalyst layer.
    Type: Application
    Filed: September 20, 2016
    Publication date: September 20, 2018
    Applicants: University of Yamanashi, Takahata Precision Japan Co., Ltd.
    Inventors: Kenji MIYATAKE, Junpei MIYAKE, Hideaki ONO, Manai SHIMADA, Naoki YOKOTA, Natsumi YOSHIMURA, Koichiro ASAZAWA, Eriko NISHINO
  • Patent number: 9931624
    Abstract: An anion exchange resin having a hydrophobic unit with divalent hydrophobic groups bonded to each other via an ether bond, the divalent hydrophobic groups being composed of one aromatic ring, or being composed of a plurality of aromatic rings which are bonded to each other via a divalent hydrocarbon group, carbon-carbon bond or the like; and a hydrophilic unit having divalent hydrophilic groups bonded to each other via carbon-carbon bond, the divalent hydrophilic groups being composed of one aromatic ring, or being composed of a plurality of aromatic rings which are bonded to each other via a divalent hydrocarbon group or carbon-carbon bond, the aromatic ring or at least one of the aromatic rings having an anion exchange group are bonded via carbon-carbon bond.
    Type: Grant
    Filed: February 28, 2015
    Date of Patent: April 3, 2018
    Assignees: TAKAHATA PRECISION JAPAN CO., LTD., UNIVERSITY OF YAMANASHI
    Inventors: Naoki Yokota, Manai Shimada, Kenji Miyatake, Masahiro Watanabe, Junpei Miyake, Eriko Nishino, Koichiro Asazawa
  • Publication number: 20170267823
    Abstract: The present invention provides an anion exchange resin capable of producing an electrolyte membrane for a fuel cell, a binder for forming an electrode catalyst layer and a battery electrode catalyst layer. The anion exchange resin of the present invention has a hydrophobic unit, a hydrophilic unit and divalent fluorine-containing groups. The hydrophobic unit has divalent hydrophobic groups composed of one aromatic ring or a plurality of aromatic rings that are repeated via carbon-carbon bond. The hydrophilic unit has divalent hydrophilic groups composed of one aromatic ring or a plurality of aromatic rings, at least one of which has an anion exchange group, that are repeated via carbon-carbon bond. The divalent fluorine-containing groups have a specific structure and are bonded via carbon-carbon bond to the hydrophobic unit and/or the hydrophilic unit and/or a moiety other than these units.
    Type: Application
    Filed: August 22, 2015
    Publication date: September 21, 2017
    Applicants: TAKAHATA PRECISION JAPAN CO., LTD., UNIVERSITY OF YAMANASHI
    Inventors: Manai SHIMADA, Naoki YOKOTA, Kenji MIYATAKE, Masahiro WATANABE, Junpei MIYAKE, Hideaki ONO, Eriko NISHINO, Koichiro ASAZAWA
  • Publication number: 20170087545
    Abstract: An anion exchange resin having a hydrophobic unit with divalent hydrophobic groups bonded to each other via an ether bond, the divalent hydrophobic groups being composed of one aromatic ring, or being composed of a plurality of aromatic rings which are bonded to each other via a divalent hydrocarbon group, carbon-carbon bond or the like; and a hydrophilic unit having divalent hydrophilic groups bonded to each other via carbon-carbon bond, the divalent hydrophilic groups being composed of one aromatic ring, or being composed of a plurality of aromatic rings which are bonded to each other via a divalent hydrocarbon group or carbon-carbon bond, the aromatic ring or at least one of the aromatic rings having an anion exchange group are bonded via carbon-carbon bond.
    Type: Application
    Filed: February 28, 2015
    Publication date: March 30, 2017
    Applicants: TAKAHATA PRECISION JAPAN CO., LTD., UNIVERSITY OF YAMANASHI
    Inventors: Naoki YOKOTA, Manai SHIMADA, Kenji MIYATAKE, Masahiro WATANABE, Junpei MIYAKE, Eriko NISHINO, Koichiro ASAZAWA
  • Patent number: 9601784
    Abstract: A supported bi-metallic non-platinum catalyst that is capable of oxidizing hydrazine to produce, as by-products of energy production, nitrogen, water, and zero or near-zero levels of ammonia is described. The catalyst is suitable for use in fuel cells, particularly those that utilizes an anion-exchange membrane and a liquid fuel such as hydrazine.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: March 21, 2017
    Assignee: STC.UNM
    Inventors: Alexey Serov, Plamen B Atanassov, Tomokazu Skamoto, Hirohisa Tanaka, Koichiro Asazawa
  • Patent number: 9379402
    Abstract: An anion conducting electrolyte membrane with high performance where the electric conductivity and the water uptake are balanced, and a method of manufacturing the same are disclosed. The anion conducting electrolyte membrane comprises: a polymeric material which consists of fluorine polymer, olefinic polymer, or aromatic polymer; weak base quaternary salt obtained by the reaction of grafts introduced by graft polymerizing vinyl monomer which contains halogenated alkyl groups using radiation and strong organic bases.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: June 28, 2016
    Assignees: Japan Atomic Energy Agency, Daihatsu Motor Co., Ltd.
    Inventors: Kimio Yoshimura, Hiroshi Koshikawa, Tetsuya Yamaki, Masaharu Asano, Yasunari Maekawa, Hideyuki Shishitani, Hirohisa Tanaka, Susumu Yamaguchi, Koichiro Asazawa, Kazuya Yamamoto, Fumihiro Sanpei
  • Patent number: 9130222
    Abstract: A fuel cell system of the present invention includes a fixing unit that fixes or releases hydrazine, a fuel cell to which hydrazine released in the fixing unit is supplied as fuel, a supply line for supplying an aqueous hydrazine solution from a hydrazine supply source to the fixing unit, a drain line for draining drained water from the fixing unit, a first sensing unit for detecting a hydrazine concentration in an aqueous hydrazine solution flowing in the supply line, a second sensing unit for detecting a hydrazine concentration in drained water flowing in the drain line, and a detection unit that detects the amount of hydrazine fixed in the fixing unit based on the concentration values detected by the first sensing unit and the second sensing unit.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: September 8, 2015
    Assignee: DAIHATSU MOTOR CO., LTD.
    Inventors: Koichiro Asazawa, Koji Yamada, Hirohisa Tanaka
  • Patent number: 8945791
    Abstract: In a fuel cell including an electrolyte layer allowing an anion component to migrate, and a fuel-side electrode and an oxygen-side electrode arranged to face each other while sandwiching the electrolyte layer, the oxygen-side electrode contains a first catalyst containing a first transition metal and polypyrrole, and a second catalyst containing a second transition metal and a porphyrin ring-containing compound so that the mixing ratio of the first catalyst relative to 100 parts by mass of the total amount of the first catalyst and the second catalyst is more than 10 parts by mass, and below 90 parts by mass.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: February 3, 2015
    Assignees: Daihatsu Motor Co. Ltd., STC UNM
    Inventors: Koichiro Asazawa, Koji Yamada, Hirohisa Tanaka, Kazuya Yamamoto, Tim Olson, Svitlana Pylypenko, Plamen Atanassov
  • Publication number: 20140066528
    Abstract: A graft chain containing an N-vinylimidazole derivative is introduced into a polymer substrate by radiation graft polymerization to obtain an alkyl substituted imidazolium salt by a reaction with an alkyl halide, so that an anion exchange membrane with high alkaline durability, in which a nucleophilic substitution reaction and an elimination reaction are inhibited, is obtained.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 6, 2014
    Applicants: Daihatsu Motor Co., Ltd., Japan Atomic Energy Agency
    Inventors: Kimio YOSHIMURA, Hiroshi KOSHIKAWA, Tetsuya YAMAKI, Masaharu ASANO, Yasunari MAEKAWA, Hideyuki SHISHITANI, Koichiro ASAZAWA, Susumu YAMAGUCHI, Hirohisa TANAKA
  • Publication number: 20130280626
    Abstract: An anion conducting electrolyte membrane with high performance where the electric conductivity and the water uptake are balanced, and a method of manufacturing the same are disclosed. The anion conducting electrolyte membrane comprises: a polymeric material which consists of fluorine polymer, olefinic polymer, or aromatic polymer; weak base quaternary salt obtained by the reaction of grafts introduced by graft polymerizing vinyl monomer which contains halogenated alkyl groups using radiation and strong organic bases.
    Type: Application
    Filed: March 5, 2013
    Publication date: October 24, 2013
    Inventors: Kimio YOSHIMURA, Hiroshi KOSHIKAWA, Tetsuya YAMAKI, Masaharu ASANO, Yasunari MAEKAWA, Hideyuki SHISHITANI, Hirohisa TANAKA, Susumu YAMAGUCHI, Koichiro ASAZAWA, Kazuya YAMAMOTO, Fumihiro SANPEI
  • Patent number: 8557476
    Abstract: A fuel cell system of the present invention includes a fixing unit that fixes or releases hydrazine; a releasing liquid supplying unit that supplies a water-based releasing liquid for releasing hydrazine fixed in the fixing unit to the fixing unit; a fuel cell to which hydrazine released in the fixing unit is supplied as fuel; a sensing unit for detecting an amount of hydrazine supplied to the fuel cell; and a detection unit that detects an amount of hydrazine fixed in the fixing unit based on a predetermined theoretical hydrazine supply amount to the fuel cell and a hydrazine supply amount detected by the sensing unit.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: October 15, 2013
    Assignee: Daihatsu Motor Co., Ltd.
    Inventors: Koichiro Asazawa, Koji Yamada, Hirohisa Tanaka