Patents by Inventor Meiten Koh

Meiten Koh 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: 11236208
    Abstract: A film having high heat resistance and a low total haze value and yellowness index. The film includes a fluorinated polyimide layer having a total haze value of 4 or lower, a yellowness index of 3 or lower, and a total luminous transmittance of 90% or higher.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: February 1, 2022
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Kouji Yokotani
  • Patent number: 10720664
    Abstract: The present invention provides a lithium ion secondary cell excellent in high-temperature storage characteristics and high voltage cycle characteristics; and a nonaqueous electrolyte for the cell.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: July 21, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Hideo Sakata, Meiten Koh, Akiyoshi Yamauchi, Hitomi Nakazawa, Tomoyo Sanagi, Aoi Nakazono, Yuki Adachi, Kyouhei Sawaki, Akinori Tani, Masahiro Tomita, Michiru Kagawa
  • Patent number: 9923240
    Abstract: An object of the present invention is to provide a lithium cell exhibiting a high remaining capacity after high-temperature storage even if used at high voltages, and an electrolytic solution used for the cell. The present invention relates to an electrolytic solution containing a nonaqueous solvent; an electrolyte salt; and 10 vol % or more of a compound represented by the following formula (1) based on 100 vol % of the nonaqueous solvent, wherein R1, R2 and R3 may be the same as or different from one another, each representing a hydrogen atom, a fluorine atom, a C1-C20 alkyl group, or a C1-C20 fluorinated alkyl group, excluding cases where all of R1, R2, and R3 are hydrogen atoms or fluorine atoms.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: March 20, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yoshiko Kuwajima, Meiten Koh, Akiyoshi Yamauchi, Hideo Sakata, Hitomi Miyawaki, Akinori Tani, Shinichi Kinoshita
  • Patent number: 9806378
    Abstract: The present invention aims to provide an electrolyte solution for forming, for example, a secondary battery having excellent oxidation resistance and high voltage cycle characteristics; an electrochemical device such as a lithium-ion secondary battery that contains the electrolyte solution; and a module that contains the electrochemical device. The present invention provides an electrolyte solution containing a solvent and an electrolyte salt, wherein the solvent contains a fluorine-containing compound (A) represented by formula (1) shown below, and a fluorine-containing compound (B) represented by formula (2) shown below: Rf1OCOOR??(1) wherein Rf1 is a C1-C4 fluorine-containing alkyl group, and R is a C1-C4 non-fluorinated alkyl group, and Rf2OCOORf3??(2) wherein Rf2 and Rf3 are the same or different, and each is a C1-C4 fluorine-containing alkyl group.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: October 31, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mayuko Taeda, Meiten Koh, Aoi Nakazono, Michiru Kagawa, Akiyoshi Yamauchi
  • Patent number: 9771539
    Abstract: The present invention aims to provide solid particles with improved lubrication, a solid lubricant including the solid particles, and a metal member including, on the surface thereof, the solid particles or the solid lubricant. The solid particles of the present invention include base particles and carbon fluoride particles attached to surfaces of the base particles.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: September 26, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Fumiko Shigenai, Tomohiro Isogai
  • Publication number: 20170152358
    Abstract: A film having high heat resistance and a low total haze value and yellowness index. The film includes a fluorinated polyimide layer having a total haze value of 4 or lower, a yellowness index of 3 or lower, and a total luminous transmittance of 90% or higher.
    Type: Application
    Filed: June 30, 2015
    Publication date: June 1, 2017
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten KOH, Kouji YOKOTANI
  • Patent number: 9666905
    Abstract: An electrolytic solution including a nonaqueous solvent (I), an electrolyte salt (II), and 0.001 to 20% by mass of a compound represented by the formula (1) or the formula (A) as defined herein.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: May 30, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Mayuko Taeda, Meiten Koh, Aoi Nakazono, Michiru Kagawa, Yoshiko Kuwajima, Michiaki Okada, Tomoo Shimada, Shinichi Kinoshita
  • Patent number: 9627714
    Abstract: A non-aqueous electrolyte including (i) a compound represented by the general formula (1): X—R—SO2F??(1) where R is a C1-12 linear or branched alkylene group optionally containing an ether bond and optionally hydrogen atoms of the alkylene group are partly substituted by a fluorine atom(s); and X is a carboxylic acid derivative group), (ii) a non-aqueous solvent and (iii) an electrolyte salt.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: April 18, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Aoi Nakazono, Mayuko Taeda, Akiyoshi Yamauchi
  • Patent number: 9601279
    Abstract: The present invention aims to provide an electrolyte solution that is less likely to lead to an increase in resistance and realizes high capacity retention factor even after continuous application of a high voltage, and to provide an electrochemical device. The present invention provides an electrolyte solution including: a nitrile compound; and a quaternary ammonium salt, the electrolyte solution having a potassium ion content of less than 10 ppm, a moisture content of 20 ppm or less, a tertiary amine content of 30 ppm or less, a heterocyclic compound content of 30 ppm or less, and an ammonia content of 20 ppm or less.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: March 21, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Kenzou Takahashi, Meiten Koh
  • Patent number: 9570778
    Abstract: The present invention aims to provide an electrolyte solution for forming, for example, a secondary battery having excellent oxidation resistance and high-temperature storage characteristics; an electrochemical device such as a lithium-ion secondary battery that contains the electrolyte solution; and a module that contains the electrochemical device. The present invention provides an electrolyte solution containing a solvent and an electrolyte salt, wherein the solvent contains a fluorine-containing compound (A) represented by formula (1) shown below in an amount of 0.01 to 20% by mass, and a fluorine-containing compound (B) represented by formula (2) shown below in an amount of 10 to 80% by mass: Rf1OCOOR??(1) wherein Rf1 is a C1-C4 fluorine-containing alkyl group, and R is a C1-C4 non-fluorinated alkyl group, and Rf2OCOORf3??(2) wherein Rf2 and Rf3 are the same or different, and each is a C1-C4 fluorine-containing alkyl group.
    Type: Grant
    Filed: April 12, 2013
    Date of Patent: February 14, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shigeaki Yamazaki, Hideo Sakata, Mayuko Taeda, Meiten Koh, Aoi Nakazono, Michiru Kagawa, Akiyoshi Yamauchi
  • Patent number: 9509016
    Abstract: An object of the present invention is to provide a battery having excellent durability at high temperature and high voltage. The present invention is a battery including a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains (i) a compound represented by the general formula (1): Rf—SO2F??(1) (where Rf is a C1-13 linear or branched fluorine-containing alkyl group optionally containing an ether bond and optionally containing a double bond).
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: November 29, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Aoi Nakazono, Hitomi Miyawaki, Hideo Sakata
  • Patent number: 9455474
    Abstract: Provided is an electrolytic solution exhibiting excellent withstand voltage and satisfactory characteristics even at low and high temperatures. The invention is an electrolytic solution that includes a cyclic carbonate (I-1) represented by formula (I-1): (in the formula, R is an alkyl group having two or more carbon atoms, a fluorine-containing alkyl group having two or more carbon atoms, an alkoxy group or a fluorine-containing alkoxy group, in which an oxygen atom may be inserted between carbon atoms); a cyclic carbonate (I-2) different from the cyclic carbonate (I-1); and an electrolyte salt (II)).
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: September 27, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Hideo Sakata, Hitomi Nakazawa, Tomoyo Sanagi, Kyouhei Sawaki, Akiyoshi Yamauchi, Aoi Nakazono, Yuki Adachi
  • Patent number: 9455468
    Abstract: The present invention aims to provide an electrochemical device excellent in high temperature storage characteristics and cycling characteristics at high voltages, and a nonaqueous electrolyte for the electrochemical device.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 27, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Hideo Sakata, Meiten Koh, Akiyoshi Yamauchi, Hitomi Nakazawa, Tomoyo Sanagi, Aoi Nakazono, Yuki Adachi, Kyouhei Sawaki, Akinori Tani, Masahiro Tomita, Mayuko Taeda
  • Patent number: 9397368
    Abstract: The present invention directs to a non-aqueous electrolyte solution, including (I) at least one compound selected from the group consisting of fluorinated linear sulfones and fluorinated linear sulfonic acid esters, and (II) an electrolyte salt. Such a non-aqueous electrolyte solution has high oxidation resistance, minimizes its decomposition even when hydrofluoric acid is produced. Also, the solution is less likely to cause, in the case of being used for a secondary cell, swelling of the cell and lowering of the battery performance.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: July 19, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Hideo Sakata, Hitomi Nakazawa, Kyouhei Sawaki, Tomoyo Sanagi, Akiyoshi Yamauchi, Aoi Nakazono, Akinori Tani, Masahiro Tomita, Yuki Adachi
  • Patent number: 9373848
    Abstract: The present invention provides a conductive protective layer-forming paste for current collector laminates which can be used even for high voltage designs to protect current collectors from corroding without loss of cell characteristics, and a current collector laminate, an electrode laminate, and nonaqueous secondary cells (e.g. a lithium secondary cell, an electric double layer capacitor) that include a conductive protective layer formed therefrom. The paste for forming conductive protective layers for current collector protection includes: polytetrafluoroethylene; and a conductive filler (b). The current collector laminate includes: a conductive protective layer (A); and a current collector (B), the conductive protective layer (A) being formed by coating the paste for forming conductive protective layers onto the current collector (B).
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: June 21, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Hideo Sakata, Tomoyo Sanagi, Hitomi Nakazawa, Hiroyuki Arima, Toshiki Ichisaka, Kenzou Takahashi
  • Patent number: 9257696
    Abstract: The invention provides a stable positive-electrode mixture slurry that is not subject to gelation, a positive electrode with abundant flexibility, and a lithium secondary battery with excellent battery characteristics. The slurry comprises a positive-electrode active material, a binder, and an organic solvent, the positive-electrode active material is a lithium-containing complex metal oxide represented by Formula: Lix M1yM21-yO2 (wherein 0.4?x?1; 0.3?y?1; M1 is at least one selected from Ni or Mn; and M2 is at least one selected from Co, Al, or Fe); and the binder comprises a fluorine-containing polymer represented by Composition Formula: (VDF)m(TFE)n(HFP)l (wherein VDF is a structural unit from vinylidene fluoride; TFE is a structural unit from tetrafluoroethylene; HFP is a structural unit from hexafluoropropylene; and 0.45?m?1; 0?n?0.5; and 0?l?0.1, and m+n+l=1).
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: February 9, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Hiroyuki Arima, Hideo Sakata, Hitomi Nakazawa
  • Patent number: 9240616
    Abstract: A solvent for non-aqueous electrolytic solution of lithium secondary battery including a non-fluorine-containing cyclic carbonate (I), a non-fluorine-containing chain carbonate (II) and 1,2-dialkyl-1,2-difluoroethylene carbonate (III). When the total amount of (I), (II) and (III) is taken as 100% by volume, the non-fluorine-containing cyclic carbonate (I) is contained in an amount of 10 to 50% by volume, the non-fluorine-containing chain carbonate (II) is contained in an amount of 49.9 to 89.9% by volume and the 1,2-dialkyl-1,2-difluoroethylene carbonate (III) is contained in an amount of not less than 0.1% by volume and less than 30% by volume. A non-aqueous electrolytic solution including the above-mentioned solvent and a lithium secondary battery using the non-aqueous electrolytic solution are also disclosed.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: January 19, 2016
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten Koh, Hideo Sakata, Hitomi Nakazawa, Akiyoshi Yamauchi, Akinori Tani
  • Publication number: 20160006078
    Abstract: The present invention aims to provide an electrolytic solution which restrains gas generation and has excellent battery characteristics. The electrolytic solution includes a nonaqueous solvent (I), an electrolyte salt (II), and 0.
    Type: Application
    Filed: February 27, 2014
    Publication date: January 7, 2016
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mayuko TAEDA, Meiten KOH, Aoi NAKAZONO, Michiru KAGAWA, Yoshiko KUWAJIMA, Michiaki OKADA, Tomoo SHIMADA, Shinichi KINOSHITA
  • Publication number: 20150368577
    Abstract: The present invention aims to provide solid particles with improved lubrication, a solid lubricant including the solid particles, and a metal member including, on the surface thereof, the solid particles or the solid lubricant. The solid particles of the present invention include base particles and carbon fluoride particles attached to surfaces of the base particles.
    Type: Application
    Filed: February 6, 2014
    Publication date: December 24, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Meiten KOH, Fumiko SHIGENAI, Tomohiro ISOGAI
  • Publication number: 20150368413
    Abstract: The present invention aims to provide a film having a high dielectric constant and a low dissipation factor. The high dielectric film of the present invention includes a vinylidene fluoride/tetrafluoroethylene copolymer (A) with a mole ratio (vinylidene fluoride)/(tetrafluoroethylene) of 95/5 to 80/20. The film includes an ?-crystal structure and a ?-crystal structure. The ratio of the ?-crystal structure is 50% or more.
    Type: Application
    Filed: October 16, 2013
    Publication date: December 24, 2015
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Mayuko TATEMICHI, Miharu OTA, Kouji YOKOTANI, Nobuyuki KOMATSU, Hisako NAKAMURA, Fumiko SHIGENAI, Takeshi HAZAMA, Masakazu KINOSHITA, Meiten KOH, Takuji ISHIKAWA, Takashi IGUCHI, Kazunobu UCHIDA, Tomoyuki FUKATANI, Takahiro KITAHARA, Tetsuhiro KODANI