Patents by Inventor Yuko Hayakawa

Yuko Hayakawa 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: 11970396
    Abstract: A negative thermal expansion material having a negative thermal expansion coefficient according to the present invention is represented by Zr2?aMaSxP2O12+?, where M is at least one selected from Ti, Ce, Sn, Mn, Hf, Ir, Pb, Pd, and Cr; a is 0?a<2; x is 0.4?x?1; and ? is a value defined as to satisfy a charge neutral condition. The present invention makes it possible to provide a negative thermal expansion material, a composite material and a method for producing a negative thermal expansion material that can realize reduction in cost and density reduction.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: April 30, 2024
    Assignees: TOKYO INSTITUTE OF TECHNOLOGY, MITSUI MINING & SMELTING CO., LTD.
    Inventors: Toshihiro Isobe, Yuko Hayakawa, Yuri Adachi, Ryosuke Uehara
  • Patent number: 11594758
    Abstract: A secondary battery capable of improving cycle characteristics, conservation characteristics, and load characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with an electrolytic solution. The electrolytic solution includes one or more of a dicarbonic ester compound, a dicarboxylic compound, a disulfonic compound, a monofluoro lithium phosphate, and difluoro lithium phosphate and one or more of fluorinated lithium phosphate, fluorinated lithium borate, and imide lithium.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: February 28, 2023
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masayuki Ihara, Yuko Hayakawa, Tadahiko Kubota
  • Publication number: 20210363012
    Abstract: A negative thermal expansion material having a negative thermal expansion coefficient according to the present invention is represented by Zr2-aMaSxP2O12+?, where M is at least one selected from Ti, Ce, Sn, Mn, Hf, Ir, Pb, Pd, and Cr; a is 0?a<2; x is 0.4?x?1; and ? is a value defined as to satisfy a charge neutral condition. The present invention makes it possible to provide a negative thermal expansion material, a composite material and a method for producing a negative thermal expansion material that can realize reduction in cost and density reduction.
    Type: Application
    Filed: February 26, 2019
    Publication date: November 25, 2021
    Inventors: Toshihiro ISOBE, Yuko HAYAKAWA, Yuri ADACHI, Ryosuke UEHARA
  • Patent number: 9912013
    Abstract: Secondary batteries capable of improving cycle characteristics are provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2-O—S(?O)2-) and at least one of a nitrile compound. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: March 6, 2018
    Assignee: Murata Manufacturing Co., LTD.
    Inventors: Yuko Hayakawa, Tadahiko Kubota, Masayuki Ihara
  • Publication number: 20180048026
    Abstract: A secondary battery capable of improving cycle characteristics, conservation characteristics, and load characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with an electrolytic solution. The electrolytic solution includes one or more of a dicarbonic ester compound, a dicarboxylic compound, a disulfonic compound, a monofluoro lithium phosphate, and difluoro lithium phosphate and one or more of fluorinated lithium phosphate, fluorinated lithium borate, and imide lithium.
    Type: Application
    Filed: October 10, 2017
    Publication date: February 15, 2018
    Inventors: Masayuki Ihara, Yuko Hayakawa, Tadahiko Kubota
  • Patent number: 9806377
    Abstract: A secondary battery capable of improving cycle characteristics, conservation characteristics, and load characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with an electrolytic solution. The electrolytic solution includes one or more of a dicarbonic ester compound, a dicarboxylic compound, a disulfonic compound, a monofluoro lithium phosphate, and difluoro lithium phosphate and one or more of fluorinated lithium phosphate, fluorinated lithium borate, and imide lithium.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: October 31, 2017
    Assignee: Sony Corporation
    Inventors: Masayuki Ihara, Yuko Hayakawa, Tadahiko Kubota
  • Publication number: 20170098860
    Abstract: Secondary batteries capable of improving cycle characteristics are provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2-O—S(?O)2-) and at least one of a nitrile compound. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
    Type: Application
    Filed: September 8, 2016
    Publication date: April 6, 2017
    Inventors: YUKO HAYAKAWA, TADAHIKO KUBOTA, MASAYUKI IHARA
  • Patent number: 9450273
    Abstract: Secondary batteries capable of improving cycle characteristics are provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2—O—S(?O)2—) and at least one of a nitrile compound. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: September 20, 2016
    Assignee: SONY CORPORATION
    Inventors: Yuko Hayakawa, Tadahiko Kubota, Masayuki Ihara
  • Publication number: 20150311566
    Abstract: Secondary batteries capable of improving cycle characteristics are provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2—O—S(?O)2—) and at least one of a nitrile compound. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
    Type: Application
    Filed: July 8, 2015
    Publication date: October 29, 2015
    Inventors: Yuko HAYAKAWA, Tadahiko KUBOTA, Masayuki IHARA
  • Patent number: 9083059
    Abstract: A secondary battery capable of improving cycle characteristics is provided. The secondary battery includes a cathode 21, an anode 22, and an electrolytic solution. A separator 23 provided between the cathode 21 and the anode 22 is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2—O—S(?O)2—) and succinonitrile. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: July 14, 2015
    Assignee: SONY CORPORATION
    Inventors: Yuko Hayakawa, Tadahiko Kubota, Masayuki Ihara
  • Publication number: 20130052543
    Abstract: A secondary battery capable of improving cycle characteristics, conservation characteristics, and load characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution. A separator provided between the cathode and the anode is impregnated with an electrolytic solution. The electrolytic solution includes one or more of a dicarbonic ester compound, a dicarboxylic compound, a disulfonic compound, a monofluoro lithium phosphate, and difluoro lithium phosphate and one or more of fluorinated lithium phosphate, fluorinated lithium borate, and imide lithium.
    Type: Application
    Filed: December 2, 2010
    Publication date: February 28, 2013
    Applicant: Sony Corporation
    Inventors: Masayuki Ihara, Yuko Hayakawa, Tadahiko Kubota
  • Publication number: 20120009486
    Abstract: A secondary battery capable of improving cycle characteristics is provided. The secondary battery includes a cathode 21, an anode 22, and an electrolytic solution. A separator 23 provided between the cathode 21 and the anode 22 is impregnated with the electrolytic solution. The electrolytic solution contains a solvent and an electrolyte salt. The solvent contains a cyclic compound having a disulfonic acid anhydride group (—S(?O)2—O—S(?O)2—) and succinonitrile. Compared to a case that the solvent does not contain both the cyclic compound having the disulfonic acid anhydride group and succinonitrile or a case that that the solvent contains at least one thereof, chemical stability of the electrolytic solution is improved. Thus, even if charge and discharge are repeated, electrolytic solution decomposition is inhibited.
    Type: Application
    Filed: March 18, 2010
    Publication date: January 12, 2012
    Applicant: SONY CORPORATION
    Inventors: Yuko Hayakawa, Tadahiko Kubota, Masayuki Ihara
  • Publication number: 20110274987
    Abstract: A secondary battery capable of improving the cycle characteristics and the storage characteristics is provided. The secondary battery includes a cathode, an anode, and an electrolytic solution containing a nonaqueous solvent and an electrolyte salt. The nonaqueous solvent contains cyclic polyester obtained by dehydrating and condensing two or more divalent carboxylic acid and one or more divalent alcohol.
    Type: Application
    Filed: March 25, 2011
    Publication date: November 10, 2011
    Applicant: SONY CORPORATION
    Inventors: Masayuki Ihara, Yuko Hayakawa, Tadahiko Kubota