Patents by Inventor Makiko Takahashi

Makiko Takahashi 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: 20200269188
    Abstract: Provided is a gas separation device configured to separate a non-hydrocarbon gas from a feed gas containing the non-hydrocarbon gas through use of a gas separation membrane, in which a decrease in operating rate can be suppressed, and economic efficiency is satisfactory. A first membrane module (1) and a second membrane module (2) are arranged in parallel to each other with respect to supply lines for a feed gas. Gas lines for regeneration (14, 15) ((24, 25)), which are branched from a permeate gas line (13) ((23)) of the membrane module (1) ((2)), and which are joined to a feed gas line (21) ((11)) configured to supply the feed gas to the membrane module (2) ((1)), are provided. Under a state in which the feed gas is supplied to the membrane module (1), a permeate gas through the membrane module (1) is supplied, as a gas for regeneration, to the membrane module (2) through the gas lines for regeneration (14, 15).
    Type: Application
    Filed: May 12, 2017
    Publication date: August 27, 2020
    Inventors: Hiroaki Hasegawa, Yasushi Fujimora, Aiko Matsuyama, Shuichi Oguro, Keiichi Nishida, Akiko Fukuta, Kenjii Yajima, Makiko Ichikawa, Takeshi Hagio, Naoko Takahashi, Makoto Miyahara, Katsuya Shimizu
  • Patent number: 10693123
    Abstract: The present invention relates to a positive electrode comprising a Mn composite oxide having a tetragonal structure represented by formula (1): Lia(MxMn2-x-yYy)(O4-wZw)(wherein 1<a?2.6, 0?x?1.2, 0?y, x+y<2, 0?w?1; M is at least one selected from the group consisting of Co, Ni, Fe, Cr and Cu; Y is at least one selected from the group consisting of Li, B, Na, Mg, Al, Ti, Si, K and Ca; Z is at least one of F or Cl; and a composite oxide having a layered structure represented by formula (2): Li(LixM1-x-yYy)O2 (wherein 0?x<0.3, 0?y<0.3; M is at least one selected from the group consisting of Co, Fe, Ni and Mn; Y is at least one selected from the group consisting of Mg, Al, Zr, Ti and Zn. According to the present invention, a lithium secondary battery having a high capacity and being excellent in cycle life can be provided.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: June 23, 2020
    Assignee: NEC Corporation
    Inventors: Makiko Takahashi, Takehiro Noguchi, Yuukou Katou
  • Patent number: 10587008
    Abstract: The present invention provides a lithium ion secondary battery having excellent high temperature cycle characteristics. The present invention relates to an electrolyte solution containing a non-aqueous electrolyte solvent containing two or more open chain sulfone compounds represented by a specific formula and one or more carbonate ester compounds represented by a specific formula; and to a secondary battery comprising these.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: March 10, 2020
    Assignee: NEC Corporation
    Inventors: Makiko Takahashi, Takehiro Noguchi
  • Publication number: 20200039715
    Abstract: There is provided a container that makes it possible to suppress intrusion of bacteria from the tip of a pleat part into the inside of the container. The container includes: a main body that includes a body part defining a containing portion and a flange part extending outward from an upper portion of the body part; and a lid that is joined to the flange part of the main body via an outer edge seal portion so as to cover the containing portion, the lid being formed by a lid member folded back at a fold-back portion such that portions of the lid member overlap each other. The lid has: a pleat part that includes the portions of the lid member overlapping each other and that extends from an edge of one side to an edge of the other side of the lid in a first direction; and a first lid part and a second lid part that are formed by the lid member and that are arranged on opposite sides of the pleat part.
    Type: Application
    Filed: March 28, 2018
    Publication date: February 6, 2020
    Inventors: Makiko TAKAHASHI, Kaoru WATANABE, Hiroshi ISHIKAWA, Satoshi TAKIMOTO
  • Patent number: 10381686
    Abstract: The present invention relates to a nonaqueous electrolyte solution comprising a nonaqueous electrolyte solvent which comprises a fluorine-containing phosphate ester represented by a specific formula, a fluorine-containing ether represented by a specific formula, and an open-chain or cyclic acid anhydride. According to the present invention, there is provided an electrolyte solution capable of realizing a lithium secondary battery having an excellent cycle characteristics with little gas generation after charge-discharge cycles.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: August 13, 2019
    Assignee: NEC Corporation
    Inventors: Yuukou Katou, Takehiro Noguchi, Makiko Takahashi, Hideaki Sasaki
  • Patent number: 10263286
    Abstract: The present invention relates to a secondary battery electrolyte, which contains a first fluorine-containing ether compound, a second fluorine-containing ether compound, and at least one selected from fluorine-containing phosphate ester compounds and sulfone compounds, wherein the fluorine substitution rate of the first fluorine-containing ether compound is lower than that of the second fluorine-containing ether compound, and the content of the first fluorine-containing ether compound is higher than that of the second fluorine-containing ether compound. According to the present invention, with respect to batteries operating at a high voltage, and batteries supposed to be used at a high temperature for a long period, there can be provided a lithium secondary battery suppressed in the decomposition reaction of the electrolyte and improved in the life characteristics.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: April 16, 2019
    Assignee: NEC Corporation
    Inventors: Takehiro Noguchi, Yuukou Katou, Hideaki Sasaki, Makiko Takahashi, Emiko Fujii
  • Patent number: 10243234
    Abstract: An object of the present invention is to provide a secondary battery having high energy density with long-term life. The present invention relates to a secondary battery comprising a negative electrode comprising a silicon-containing compound and an electrolyte solution comprising a fluorine-containing ether compound, a fluorine-containing phosphoric acid ester, a sulfone compound and a cyclic carbonate compound in a predetermined amount respectively.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: March 26, 2019
    Assignee: NEC Corporation
    Inventors: Takehiro Noguchi, Yuukou Katou, Makiko Takahashi
  • Patent number: 10177413
    Abstract: The present invention is a lithium ion secondary battery comprising a positive electrode and a non-aqueous electrolyte solution comprising a non-aqueous electrolyte solvent, wherein the positive electrode comprises a positive electrode active material having an operating potential at 4.5 V or higher versus lithium metal, the non-aqueous electrolyte solvent comprises a fluorinated phosphate ester represented by a predetermined formula and at least one selected from the group consisting of sulfone compounds represented by predetermined formulae, and the sulfone compound is included in an amount of 5 volume % or more in the non-aqueous electrolyte solvent.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: January 8, 2019
    Assignee: NEC Corporation
    Inventors: Hideaki Sasaki, Takehiro Noguchi, Yuukou Katou, Makiko Takahashi
  • Patent number: 10014555
    Abstract: An embodiment of the present invention relates to a lithium secondary battery comprising a nonaqueous electrolytic solution comprising a phosphate compound represented by the following general formula (1): O?P(O—R1)(O—R2)(O—R3) (1), wherein R1, R2, and R3 are each alkyl group or the like or a group comprising an ether bond represented by —R4—O—R5 (R4 represents alkylene group, and R5 represents alkyl group), and at least one of R1, R2, and R3 is a group comprising an ether bond, and at least one of R1, R2, and R3 contains fluorine, and a positive electrode active material having a charge and discharge region of 4.5 V or more versus lithium.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: July 3, 2018
    Assignee: NEC Corporation
    Inventors: Takehiro Noguchi, Hideaki Sasaki, Makiko Takahashi, Yuukou Katou
  • Patent number: 10003072
    Abstract: A secondary battery having an improved life characteristics is provided by the use of a positive electrode active material for a secondary battery, comprising (a) a surface layer comprising a lithium metal composite oxide having a spinel crystal structure represented by space group Fd-3m, and (b) an internal portion comprising a lithium metal composite oxide having a spinel crystal structure represented by space group P4332.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: June 19, 2018
    Assignee: NEC Corporation
    Inventors: Takehiro Noguchi, Makiko Takahashi, Shin Serizawa
  • Patent number: 9935337
    Abstract: The present invention relates to a lithium secondary battery, comprising a positive electrode; a negative electrode; and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a phosphate polymer represented by the following formula (1): wherein R1 to R5 each independently represents aliphatic hydrocarbon group or fluorinated aliphatic hydrocarbon group, wherein the group may have a substituent, and n represents an integer of 1 or more, with the proviso that when n is 2 or more, two or more R1(s) may be the same as, or different from each other and two or more R4(s) may be the same as, or different from each other; and a fluorinated phosphate represented by the following formula (2): wherein R6 to R8 each independently represents aliphatic hydrocarbon group or fluorinated aliphatic hydrocarbon group, wherein the group may have a substituent, with the proviso that at least one of R6 to R8 is fluorinated aliphatic hydrocarbon group.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: April 3, 2018
    Assignee: NEC Corporation
    Inventors: Makiko Takahashi, Takehiro Noguchi, Hideaki Sasaki, Yuukou Katou
  • Patent number: 9905887
    Abstract: The present invention relates to a secondary battery cg a positive electrode capable of absorbing and releasing lithium, and a electrolyte solution containing a non-aqueous electrolytic solvent, wherein the positive electrode has a positive electrode active material which operates at 4.5 V or more relative to lithium, and wherein the non-aqueous electrolytic solvent contains a sulfone compound represented by a predetermined formula and a fluorinated ether compound represented by a predetermined formula.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: February 27, 2018
    Assignee: NEC Corporation
    Inventors: Makiko Takahashi, Takehiro Noguchi, Hideaki Sasaki, Yuukou Katou, Akinobu Nakamura
  • Publication number: 20170352908
    Abstract: An object of the present invention is to provide a secondary battery having high energy density with long-term life. The present invention relates to a secondary battery comprising a negative electrode comprising a silicon-containing compound and an electrolyte solution comprising a fluorine-containing ether compound, a fluorine-containing phosphoric acid ester, a sulfone compound and a cyclic carbonate compound in a predetermined amount respectively.
    Type: Application
    Filed: October 21, 2015
    Publication date: December 7, 2017
    Applicant: NEC Corporation
    Inventors: Takehiro NOGUCHI, Yuukou KATOU, Makiko TAKAHASHI
  • Patent number: 9742041
    Abstract: An object of the present invention is to provide a battery system improved in output characteristics and/or storage characteristic while taking advantage of high energy density of a lithium ion secondary battery comprising a positive electrode containing a positive electrode active material having an operating potential of 4.5 V or more relative to a lithium metal. The present invention relates to a battery system having a first battery consisting of a 5 V-level battery(s), a second battery consisting of a 4 V-level battery(s), and a control system.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: August 22, 2017
    Assignee: NEC Corporation
    Inventors: Hideaki Sasaki, Takehiro Noguchi, Yuukou Katou, Makiko Takahashi
  • Publication number: 20170229704
    Abstract: The present invention relates to a positive electrode comprising a Mn composite oxide having a tetragonal structure represented by formula (1): Lia(MxMn2-x-yYy)(O4-wZw)(wherein 1<a?2.6, 0?x?1.2, 0?y, x+y<2, 0?w?1; M is at least one selected from the group consisting of Co, Ni, Fe, Cr and Cu; Y is at least one selected from the group consisting of Li, B, Na, Mg, Al, Ti, Si, K and Ca; Z is at least one of F or Cl; and a composite oxide having a layered structure represented by formula (2): Li(LixM1-x-yYy)O2 (wherein 0?x<0.3, 0?y<0.3; M is at least one selected from the group consisting of Co, Fe, Ni and Mn; Y is at least one selected from the group consisting of Mg, Al, Zr, Ti and Zn. According to the present invention, a lithium secondary battery having a high capacity and being excellent in cycle life can be provided.
    Type: Application
    Filed: August 6, 2015
    Publication date: August 10, 2017
    Applicant: NEC Corporation
    Inventors: Makiko TAKAHASHI, Takehiro NOGUCHI, Yuukou KATOU
  • Publication number: 20170170520
    Abstract: The present invention provides a lithium ion secondary battery having excellent high temperature cycle characteristics. The present invention relates to an electrolyte solution containing a non-aqueous electrolyte solvent containing two or more open chain sulfone compounds represented by a specific formula and one or more carbonate ester compounds represented by a specific formula; and to a secondary battery comprising these.
    Type: Application
    Filed: November 25, 2014
    Publication date: June 15, 2017
    Inventors: Makiko TAKAHASHI, Takehiro NOGUCHI
  • Publication number: 20170162910
    Abstract: The present invention relates to a nonaqueous electrolyte solution comprising a nonaqueous electrolyte solvent which comprises a fluorine-containing phosphate ester represented by a specific formula, a fluorine-containing ether represented by a specific formula, and an open-chain or cyclic acid anhydride. According to the present invention, there is provided an electrolyte solution capable of realizing a lithium secondary battery having an excellent cycle characteristics with little gas generation after charge-discharge cycles.
    Type: Application
    Filed: July 15, 2015
    Publication date: June 8, 2017
    Applicant: NEC Corporation
    Inventors: Yuukou KATOU, Takehiro NOGUCHI, Makiko TAKAHASHI, Hideaki SASAKI
  • Patent number: 9650626
    Abstract: A nucleic acid extractor reducing the possibility of cross contamination and a gene analysis apparatus having a nucleic acid amplification function and a detection function are provided. The nucleic acid extractor has a kit for nucleic acid extraction using silica-coated magnetic beads under the presence of a chaotropic agent, and includes a magnet cover 52 accommodating a magnet 42 in the inside and separating the magnet 42 and a reaction container 2, a wall part 53 covering the outside of the reaction container 2 in a state of accommodating at least a portion of the magnet cover 52 in the reaction container, and a upper portion 54 covering a space above the reaction container 2 in a state of accommodating at least a portion of the magnet cover 52 in the reaction container. Scattering of liquid and aerosol can be prevented and the possibility of cross contamination can be reduced.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: May 16, 2017
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Makiko Takahashi, Kohshi Maeda, Yasunori Shoji, Muneo Maeshima
  • Patent number: 9601809
    Abstract: A lithium ion secondary battery which is a non-aqueous electrolyte secondary battery comprising a positive electrode comprising a positive electrode active material capable of absorbing and releasing lithium, and an electrolyte solution comprising a non-aqueous electrolyte solvent, wherein the positive electrode comprises a sulfate group, and the non-aqueous electrolyte solvent comprises a sulfone compound represented by a specified formula.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: March 21, 2017
    Assignee: NEC Corporation
    Inventors: Makiko Takahashi, Takehiro Noguchi
  • Publication number: 20160308199
    Abstract: A secondary battery having an improved life characteristics is provided by the use of a positive electrode active material for a secondary battery, comprising (a) a surface layer comprising a lithium metal composite oxide having a spinel crystal structure represented by space group Fd-3m, and (b) an internal portion comprising a lithium metal composite oxide having a spinel crystal structure represented by space group P4332.
    Type: Application
    Filed: November 5, 2014
    Publication date: October 20, 2016
    Inventors: Takehiro NOGUCHI, Makiko TAKAHASHI, Shin SERIZAWA