Patents by Inventor Takumi Okuyama

Takumi Okuyama 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: 20210332171
    Abstract: To provide a polymer wherein a linking group that connects the main chain of the polymer and a cyclic perfluoroaliphatic disulfonimide skeleton, is a fluoroalkylene group which may have an ether oxygen atom. A polymer which has either one or both of units represented by formula u1-1 and units represented by formula u1-2: RF1, RF2: a C1-3 perfluoroalkylene group; RF3: a C1-6 perfluoroalkylene group; m: 0 or 1; and X: a hydrogen atom, an alkali metal atom, a fluorine atom, an alkyl group, ammonium or the like.
    Type: Application
    Filed: June 18, 2021
    Publication date: October 28, 2021
    Applicant: AGC Inc.
    Inventors: Takeshi HIRAI, Daisuke JOMUTA, Chikaya TAMITSUJI, Takumi OKUYAMA
  • Publication number: 20210296673
    Abstract: To provide a liquid composition capable of forming a polymer electrolyte membrane which is excellent in the initial power generation characteristics when made into a membrane electrode assembly, and which is excellent in durability and has few defects. This liquid composition comprises a liquid medium, a sulfonic acid group-containing fluorocarbon polymer and a hardly soluble cerium compound, wherein the ion exchange capacity of the sulfonic acid group-containing fluorocarbon polymer is from 1.36 to 2.50 meq/g dry resin, the average particle size of the hardly soluble cerium compound is from 1 nm to 3,000 nm, and the ratio of the total number of moles of cerium atoms in the hardly soluble cerium compound to the total number of moles of sulfonic acid groups in the sulfonic acid group-containing fluorocarbon polymer is from 0.001 to 0.3.
    Type: Application
    Filed: May 28, 2021
    Publication date: September 23, 2021
    Applicant: AGC Inc.
    Inventors: Susumu SAITO, Takumi OKUYAMA, Hiroyuki WATABE
  • Publication number: 20210284813
    Abstract: To provide a liquid composition capable of forming a membrane excellent in durability against hydrogen peroxide or peroxide radicals and excellent in hydrogen gas barrier property; a polymer electrolyte membrane; a membrane electrode assembly; and a polymer electrolyte fuel cell. Liquid composition comprising a liquid medium, an acid-type sulfonic acid group-containing fluorocarbon polymer of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10?9 cm3·cm/(s·cm2·cmHg), and cerium atoms; a polymer electrolyte membrane 15 comprising the acid-type sulfonic acid group-containing fluorocarbon polymer, and cerium atoms; and a membrane electrode assembly 10 comprising an anode 13 having a catalyst layer, a cathode 14 having a catalyst layer, and the polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 16, 2021
    Applicant: AGC Inc.
    Inventors: Takumi OKUYAMA, Takeshi HIRAI, Susumu SAITO, Chikaya TAMITSUJI, Daisuke JOMUTA
  • Patent number: 11031618
    Abstract: To provide a polymer capable of forming a polymer electrolyte membrane that is resistant to breakage even when being repeatedly subjected to humidification and drying or a catalyst layer that is resistant to formation of cracks; a polymer electrolyte membrane employing said polymer; and a membrane/electrode assembly for a polymer electrolyte fuel cell. A polymer comprising units (u1) having two ion-exchange groups and units (u2) of e.g. a perfluoro(alkyl vinyl ether), wherein the molar ratio (u2)/((u1)+(u2)) is more than 0.30 and at most 0.70. A membrane/electrode assembly 10 comprising an anode 13 having a catalyst layer 11 and a gas diffusion layer 12, a cathode 14 having a catalyst layer 11 and a gas diffusion layer 12, and a polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14 in a state of being contact with the catalyst layers 11, wherein either one or each of the catalyst layers 11 and the polymer electrolyte membrane 15 contains the aforementioned polymer.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: June 8, 2021
    Assignee: AGC Inc.
    Inventors: Susumu Saito, Hiroyuki Watabe, Takumi Okuyama
  • Publication number: 20200259196
    Abstract: The present invention provides a strong polymer electrolyte membrane which can provide a water electrolyzer operable at low electrolysis voltage. The polymer electrolyte membrane of the present invention comprises a fluorinated polymer and a woven fabric, wherein the weight of the woven fabric is from 20 to 95 g/m2, and the warp and weft of the woven fabric independently have a denier of from 30 to 100.
    Type: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Applicant: AGC Inc.
    Inventors: Yasushi YAMAKI, Kosuke Sumikura, Takuo Nishio, Takumi Okuyama, Satoru Hommura
  • Publication number: 20190221874
    Abstract: To provide a polymer capable of forming a polymer electrolyte membrane that is resistant to breakage even when being repeatedly subjected to humidification and drying or a catalyst layer that is resistant to formation of cracks; a polymer electrolyte membrane employing said polymer; and a membrane/electrode assembly for a polymer electrolyte fuel cell. A polymer comprising units (u1) having two ion-exchange groups and units (u2) of e.g. a perfluoro(alkyl vinyl ether), wherein the molar ratio (u2)/((u1)+(u2)) is more than 0.30 and at most 0.70. A membrane/electrode assembly 10 comprising an anode 13 having a catalyst layer 11 and a gas diffusion layer 12, a cathode 14 having a catalyst layer 11 and a gas diffusion layer 12, and a polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14 in a state of being contact with the catalyst layers 11, wherein either one or each of the catalyst layers 11 and the polymer electrolyte membrane 15 contains the aforementioned polymer.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Applicant: AGC Inc.
    Inventors: Susumu Saito, Hiroyuki Watabe, Takumi Okuyama
  • Patent number: 10303149
    Abstract: An intelligent function unit includes an input selector selecting, as an input signal, an actual input signal or a simulated input signal generated in advance; an output selector selecting whether to output an output signal to the second controlled device; and a calculator causing an input/output controller in which combination and order of use of general circuit blocks are set to process the input signal one step at a time and transmit the output signal to an engineering tool or causing the input/output controller in which combination and order of use of the general circuit blocks are set to process the input signal consecutively for a set period of two or more steps, store the output signal for each step in a logger, and transmit an output signal corresponding to the set period and stored in the logger to the engineering tool.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: May 28, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takumi Okuyama, Naotoshi Sakamoto
  • Patent number: 10283800
    Abstract: To provide a liquid composition capable of forming a catalyst layer that is excellent in resistance to hydrogen peroxide and peroxide radicals, can further increase the output voltage of a membrane/electrode assembly, and can maintain a high output voltage for a long period of time; a method for its production; and a membrane electrode assembly for a polymer electrolyte fuel cell using said liquid composition. Provided is a liquid composition to be used for forming a catalyst layer constituting an electrode of a membrane electrode assembly for a polymer electrolyte fuel cell, wherein the liquid composition comprises a liquid medium, a fluoropolymer (H) having sulfonic acid groups and ring structures, and trivalent or tetravalent cerium ions, and the content of the trivalent or tetravalent cerium ions is from 1.6 to 23.3 mol % to the sulfonic acid groups (100 mol %).
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: May 7, 2019
    Assignee: AGC Inc.
    Inventors: Takumi Okuyama, Satoru Hommura, Shinji Kinoshita
  • Publication number: 20180329388
    Abstract: An intelligent function unit includes an input selector selecting, as an input signal, an actual input signal or a simulated input signal generated in advance; an output selector selecting whether to output an output signal to the second controlled device; and a calculator causing an input/output controller in which combination and order of use of general circuit blocks are set to process the input signal one step at a time and transmit the output signal to an engineering tool or causing the input/output controller in which combination and order of use of the general circuit blocks are set to process the input signal consecutively for a set period of two or more steps, store the output signal for each step in a logger, and transmit an output signal corresponding to the set period and stored in the logger to the engineering tool.
    Type: Application
    Filed: January 28, 2015
    Publication date: November 15, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takumi OKUYAMA, Naotoshi SAKAMOTO
  • Patent number: 9971332
    Abstract: An input/output control device includes: a bus connected to an input interface; a plurality of circuit selectors which are connected to the bus and to which validity or invalidity of an operation is set, each circuit selector outputting a signal of the bus when the validity is set; a plurality of logical circuits which are respectively provided to each of the circuit selectors, each logical circuit performing a logical operation when a signal is inputted from the circuit selector; an output selector which is connected to the bus and to which validity or invalidity of an operation is set, the output selector outputting a signal of the bus to an output interface when the validity is set; and an operation part which validates or invalidates the plurality of circuit selectors or the output selector based on an operation order of the plurality of circuit selectors and the output selector.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: May 15, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takumi Okuyama, Naotoshi Sakamoto
  • Publication number: 20170220020
    Abstract: An input/output control device includes: a bus connected to an input interface; a plurality of circuit selectors which are connected to the bus and to which validity or invalidity of an operation is set, each circuit selector outputting a signal of the bus when the validity is set; a plurality of logical circuits which are respectively provided to each of the circuit selectors, each logical circuit performing a logical operation when a signal is inputted from the circuit selector; an output selector which is connected to the bus and to which validity or invalidity of an operation is set, the output selector outputting a signal of the bus to an output interface when the validity is set; and an operation part which validates or invalidates the plurality of circuit selectors or the output selector based on an operation order of the plurality of circuit selectors and the output selector.
    Type: Application
    Filed: September 11, 2014
    Publication date: August 3, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takumi OKUYAMA, Naotoshi SAKAMOTO
  • Patent number: 9680449
    Abstract: An encoder input device includes a connection terminal to be connected to one of encoders and made common to a plurality of types of signal systems of the encoders, a plurality of power supplies for signals according to the plurality of types of signal systems of the encoders, and a software switch that switches connection arrangement between the connection terminal and the power supplies for signals in a software manner according to the signal system of the encoder connected to the connection terminal among the plurality of types of signal systems of the encoders.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: June 13, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Takumi Okuyama
  • Publication number: 20160293987
    Abstract: To provide a liquid composition capable of forming a catalyst layer that is excellent in resistance to hydrogen peroxide and peroxide radicals, can further increase the output voltage of a membrane/electrode assembly, and can maintain a high output voltage for a long period of time; a method for its production; and a membrane electrode assembly for a polymer electrolyte fuel cell using said liquid composition. Provided is a liquid composition to be used for forming a catalyst layer constituting an electrode of a membrane electrode assembly for a polymer electrolyte fuel cell, wherein the liquid composition comprises a liquid medium, a fluoropolymer (H) having sulfonic acid groups and ring structures, and trivalent or tetravalent cerium ions, and the content of the trivalent or tetravalent cerium ions is from 1.6 to 23.3 mol % to the sulfonic acid groups (100 mol %).
    Type: Application
    Filed: June 13, 2016
    Publication date: October 6, 2016
    Applicant: Asahi Glass Company, Limited
    Inventors: Takumi OKUYAMA, Satoru HOMMURA, Shinji KINOSHITA
  • Patent number: 9148081
    Abstract: A position-command-pulse generation unit generates a position command pulse to be output to a motor driver by advancing an initial phase thereof by a phase indicated by initial phase information preset in a device. The initial phase information indicates an arbitrary phase in a period of a half cycle of a first pulse of the position command pulse.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: September 29, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Kakimoto, Takumi Okuyama
  • Publication number: 20150054669
    Abstract: An encoder input device includes a connection terminal to be connected to one of encoders and made common to a plurality of types of signal systems of the encoders, a plurality of power supplies for signals according to the plurality of types of signal systems of the encoders, and a software switch that switches connection arrangement between the connection terminal and the power supplies for signals in a software manner according to the signal system of the encoder connected to the connection terminal among the plurality of types of signal systems of the encoders.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 26, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Takumi Okuyama
  • Publication number: 20130033219
    Abstract: A position-command-pulse generation unit generates a position command pulse to be output to a motor driver by advancing an initial phase thereof by a phase indicated by initial phase information preset in a device. The initial phase information indicates an arbitrary phase in a period of a half cycle of a first pulse of the position command pulse.
    Type: Application
    Filed: June 16, 2010
    Publication date: February 7, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Koichi Kakimoto, Takumi Okuyama