Patents by Inventor Kenta Ishii

Kenta Ishii 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: 10014514
    Abstract: In a nonaqueous secondary battery including a pressure-operated current interrupt device, a ratio (Vt/Cr) of a sum Vt (cm3) of an effective pore volume Vp of the positive electrode active material layer, an effective pore volume Vn of the negative electrode active material layer, and a pore volume Vs of the separator to a volume Cr (cm3) of a remaining space in the battery case is 0.92 to 1.05. The volume Cr of the remaining space in the battery case is calculated by subtracting a volume Ce of the electrode body, a volume Cna of the nonaqueous electrolytic solution, and a volume Cc of auxiliary components from a volume Ct of the battery case. The remaining space volume Cr (cm3) is 14.8 vol % or higher of the volume Ct (cm3) of the battery case.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: July 3, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kenta Ishii
  • Publication number: 20180159019
    Abstract: A piezoelectric thin film-stacked body is provided. A piezoelectric thin film-stacked body has a first electrode layer, a first intermediate layer stacked on the first electrode layer, a second intermediate layer stacked on the first intermediate layer, and a piezoelectric thin film stacked on the second intermediate layer, the first intermediate layer includes K, Na, and Nb, the second intermediate layer is a layer causing stress in a compression direction in the piezoelectric thin film, and the piezoelectric thin film includes (K,Na)NbO3.
    Type: Application
    Filed: December 4, 2017
    Publication date: June 7, 2018
    Applicant: TDK CORPORATION
    Inventors: Masaru NANAO, Kouhei OHHASHI, Kenta ISHII
  • Publication number: 20180159020
    Abstract: A piezoelectric thin film-stacked body is provided. A piezoelectric thin film-stacked body has a first electrode layer, a first oxide layer stacked on the first electrode layer, a second oxide layer stacked on the first oxide layer, and a piezoelectric thin film stacked on the second oxide layer, the electrical resistivity of the first oxide layer is higher than the electrical resistivity of the second oxide layer, the first oxide layer includes K, Na, and Nb, and the piezoelectric thin film includes (K,Na)NbO3.
    Type: Application
    Filed: December 5, 2017
    Publication date: June 7, 2018
    Applicant: TDK CORPORATION
    Inventors: Hitoshi SAKUMA, Tomohisa AZUMA, Kenta ISHII
  • Publication number: 20180071199
    Abstract: A polymer treatment agent for rehabilitating damaged hair contains a block copolymer including a hydrophilic polymer chain segment and a hydrophobic polymer chain segment that is derived from a polyamino acid. The polymer treatment agent is not limited to methods for rehabilitating damaged head hair, but also can be applied to body hair including eyelashes and eyebrows; furthermore, it can increase the physical strength of hair even when applied in a very small amount and without using a silicone component.
    Type: Application
    Filed: February 29, 2016
    Publication date: March 15, 2018
    Inventors: Kenta ISHII, Miho KOKUBO, Ichiro NAKATOMI, Yasuki KATO, Sakiko KATO
  • Publication number: 20180015007
    Abstract: A polymeric micelle carrier composition contains i) a block copolymer having a hydrophilic polymer chain segment and a hydrophobic polymer chain segment; ii) a charged surfactant; and iii) a fatty oil. The carrier composition can be utilized as a base material of a cosmetic composition or a pharmaceutical composition and excels in loadability of non-lipophilic drugs. One example of a non-lipophilic drug is a hair growth promoting peptide.
    Type: Application
    Filed: February 29, 2016
    Publication date: January 18, 2018
    Applicant: NanoCarrier Co., Ltd.
    Inventors: Kenta ISHII, Yasuki KATO
  • Publication number: 20170288127
    Abstract: A piezoelectric ceramic sputtering target containing a perovskite type oxide represented by chemical formula (I) of ABO3 as a main component, wherein the component A of the chemical formula (I) contains at least K (potassium) and/or Na (sodium), the component B of the chemical formula (I) contains at least Nb (niobium), the piezoelectric ceramic sputtering target is composed of a plurality of crystal grains; and the average particle diameter of the crystal grains is larger than 3 ?m and not larger than 30 ?m.
    Type: Application
    Filed: March 27, 2017
    Publication date: October 5, 2017
    Applicant: TDK CORPORATION
    Inventors: Tomohisa AZUMA, Masaru NANAO, Kenta ISHII
  • Publication number: 20170288128
    Abstract: A piezoelectric ceramic sputtering target containing a perovskite type oxide represented by chemical formula (I) of ABO3 as a main component, wherein the component A of the chemical formula (I) contains at least K (potassium) and/or Na (sodium), the component B of the chemical formula (I) contains at least one selected from the group consisting of Nb (niobium), Ta (tantalum) and Zr (zirconium) with Nb (niobium) as a necessity, the piezoelectric ceramic sputtering target is composed of a plurality of crystal grains and grain boundaries existing among the crystal grains, and in the grain boundary, the molar ratio of at least one of Nb (niobium), Ta (tantalum), and Zr (zirconium) in the B components is higher than the molar ratio in the interior of the crystal grains by 30% or more.
    Type: Application
    Filed: March 22, 2017
    Publication date: October 5, 2017
    Applicant: TDK CORPORATION
    Inventors: Tomohisa AZUMA, Masaru NANAO, Tatsuji SANO, Masahito FURUKAWA, Kenta ISHII
  • Publication number: 20170149100
    Abstract: A manufacturing method includes a battery assembly fabricating step in which a positive electrode, a negative electrode, and a nonaqueous electrolyte containing an overcharge additive and difluorophosphate are provided in a battery case, a first charging step and a conditioning step. In the conditioning step, discharging to a predetermined lowest SOC and charging to a predetermined highest SOC are performed at least once. The predetermined lowest SOC and the predetermined highest SOC are values enabling a volume change rate available when a lattice volume of a crystallite of the positive electrode active material at the lowest SOC is compared with a lattice volume of a crystallite at the highest SOC to become larger than 0% and equal to or smaller than 3%, and the highest SOC is a value enabling a high potential at which a conductive film derived from the overcharge additive can be formed.
    Type: Application
    Filed: March 19, 2015
    Publication date: May 25, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kenta ISHII
  • Publication number: 20170077486
    Abstract: In a nonaqueous secondary battery including a pressure-operated current interrupt device, a ratio (Vt/Cr) of a sum Vt (cm3) of an effective pore volume Vp of the positive electrode active material layer, an effective pore volume Vn of the negative electrode active material layer, and a pore volume Vs of the separator to a volume Cr (cm3) of a remaining space in the battery case is 0.92 to 1.05. The volume Cr of the remaining space in the battery case is calculated by subtracting a volume Ce of the electrode body, a volume Cna of the nonaqueous electrolytic solution, and a volume Cc of auxiliary components from a volume Ct of the battery case. The remaining space volume Cr (cm3) is 14.8 vol % or higher of the volume Ct (cm3) of the battery case.
    Type: Application
    Filed: May 13, 2015
    Publication date: March 16, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kenta ISHII
  • Publication number: 20160372798
    Abstract: A non-aqueous electrolyte secondary battery includes an electrode body, a non-aqueous electrolyte, and a battery case. The electrode body has a cathode and an anode. The cathode has a cathode active substance. The anode has an anode active substance. A relationship between an irreversible capacity of the anode and an irreversible capacity of the cathode satisfies Uc<Ua. Where, Ua is the irreversible capacity of the anode, which is a product of multiplying a unit irreversible capacity of the anode per 1 g of the anode active substance by a mass of the anode active substance, and Uc is the irreversible capacity of the cathode, which is a product of multiplying a unit irreversible capacity of the cathode per 1 g of the cathode active substance by a mass of the cathode active substance.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 22, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kenta ISHII
  • Patent number: 8153303
    Abstract: A negative electrode material for lithium ion secondary batteries includes core-shell composite particles prepared by covering the surface of a graphite powder with an amorphous carbon powder via a carbide of binder pitch, the graphite powder having an average particle diameter of 5 to 30 ?m and an average lattice spacing d(002) of less than 0.3360 nm, and the amorphous carbon powder having an average particle diameter of 0.05 to 2 ?m and an average lattice spacing d(002) of 0.3360 nm or more. A method to produce the negative electrode material includes mixing a graphite powder with pitch having a softening point of 70 to 250° C., adding an amorphous carbon powder to the resulting product, kneading the mixture while applying a mechanical impact to soften the pitch and carbonizing the pitch by heat treatment of the mixture at 750 to 2250° C. in a non-oxidizing atmosphere.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: April 10, 2012
    Assignee: Tokai Carbon Co., Ltd.
    Inventor: Kenta Ishii
  • Publication number: 20100068626
    Abstract: A negative electrode material for lithium secondary batteries includes carbon microspheres having an arithmetic mean particle diameter do measured using an electron microscope of 150 to 1000 nm, a volatile content Vm of 5.0% or less, a ratio ?Dst/Dst (where, Dst indicates the Stokes mode diameter Dst measured using a disk centrifuge (DCF), and ?Dst indicates the half-width of the Stokes mode diameter Dst) of 0.40 to 1.10, and a lattice spacing (d002) measured by X-ray diffractometry of 0.370 nm or less. The negative electrode material is used for a high-output lithium secondary battery that has a high lithium ion doping-undoping speed and excellent cycle characteristics, and is suitable as a power supply for portable instruments, hybrid cars, electric vehicles, and the like.
    Type: Application
    Filed: May 29, 2007
    Publication date: March 18, 2010
    Inventors: Kazuo Yoshikawa, Koji Miura, Masakatsu Tsuchiya, Kenta Ishii
  • Publication number: 20100021820
    Abstract: A negative electrode material for lithium ion secondary batteries includes core-shell composite particles prepared by covering the surface of a graphite powder with an amorphous carbon powder via a carbide of binder pitch, the graphite powder having an average particle diameter of 5 to 30 ?m and an average lattice spacing d(002) of less than 0.3360 nm, and the amorphous carbon powder having an average particle diameter of 0.05 to 2 ?m and an average lattice spacing d(002) of 0.3360 nm or more. A method to produce the negative electrode material includes mixing a graphite powder with pitch having a softening point of 70 to 250° C., adding an amorphous carbon powder to the resulting product, kneading the mixture while applying a mechanical impact to soften the pitch, so that the amorphous carbon powder is dispersed and stabilized in the pitch that has softened, and carbonizing the pitch by heat treatment of the mixture at 750 to 2250° C. in a non-oxidizing atmosphere.
    Type: Application
    Filed: November 8, 2007
    Publication date: January 28, 2010
    Inventor: Kenta Ishii