Patents by Inventor Kazutaka Hirano

Kazutaka Hirano 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: 11964871
    Abstract: To provide a novel immobilized product in which a carbon material and/or a silicon material is/are immobilized on a base material surface by a chemical bond via a linking group, and a method for producing the same. The immobilized product is an immobilized product in which a carbon material is immobilizing on a surface of a base material, wherein the carbon material is chemically bonded on the surface of the base material via a linking group, and the linking group is at least one selected from the group consisting of a —NH group, a —NH—R1—NH group, a —SO group, a R2 group, a —O—R3—O group, and a R4 group (in which the R1 to R4 each independently represent at least one selected from the group consisting of a chain alkyl group, a cyclic alkyl group, a chain alkenyl group, a cyclic alkenyl group, a chain alkynyl group, etc.).
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 23, 2024
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Akira Ishimaru, Yoshinori Sato, Hironori Matsushita, Kazutaka Hirano, Tetsuo Nishida
  • Patent number: 11155465
    Abstract: A cross-linked structure of a carbon material is excellent in mechanical strength, such as tensile strength. The carbon materials such as carbon nanotube, graphite, fullerene, and carbon nanocoil, are cross-linked with each other. The carbon materials are cross-linked through a linking group derived from a nucleophilic compound having two or more nucleophilic groups in the molecule.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: October 26, 2021
    Assignee: Stella Chemifa Corporation
    Inventors: Yoshinori Sato, Kazutaka Hirano, Yuki Kikui
  • Publication number: 20190322531
    Abstract: Disclosed is a carbon material, such as a carbon nanotube, into which a boron atom and/or a phosphorus atom is/are introduced while maintaining its characteristic structures and functions and a method for producing the same. The carbon material of the present invention is one in which a boron atom and/or a phosphorus atom is/are introduced into part of carbon atoms composing the carbon material, and can be produced by a method for producing a carbon material including the steps of: bringing a carbon material into contact with a fluorination treatment gas containing a fluorine-containing gas, thereby subjecting a surface of the carbon material to fluorination treatment; and bringing the carbon material after the fluorination treatment into contact with a boronization treatment gas containing a boron-containing gas, thereby subjecting to boronization treatment and/or into contact with a phosphorization treatment gas containing a phosphorus-containing gas, thereby subjecting to phosphorization treatment.
    Type: Application
    Filed: June 9, 2017
    Publication date: October 24, 2019
    Inventors: Kazuyuki TOHJI, Yoshinori SATO, Koji YOKOYAMA, Kazutaka HIRANO, Yoshinori SATO
  • Publication number: 20190112193
    Abstract: To provide a novel immobilized product in which a carbon material and/or a silicon material is/are immobilized on a base material surface by a chemical bond via a linking group, and a method for producing the same. The immobilized product is an immobilized product in which a carbon material is immobilizing on a surface of a base material, wherein the carbon material is chemically bonded on the surface of the base material via a linking group, and the linking group is at least one selected from the group consisting of a —NH group, a —NH—R1—NH group, a —SO group, a R2 group, a —O—R3—O group, and a R4 group (in which the R1 to R4 each independently represent at least one selected from the group consisting of a chain alkyl group, a cyclic alkyl group, a chain alkenyl group, a cyclic alkenyl group, a chain alkynyl group, etc.).
    Type: Application
    Filed: April 20, 2017
    Publication date: April 18, 2019
    Inventors: Akira ISHIMARU, Yoshinori SATO, Hironori MATSUSHITA, Kazutaka HIRANO, Tetsuo NISHIDA
  • Patent number: 10046971
    Abstract: A nitrogen-containing carbon material to the present invention comprises a carbon material having a carbon skeleton formed of carbon atoms and nitrogen atoms introduced into the carbon material, wherein part of carbon atoms in the carbon skeleton are substituted with nitrogen atoms. The nitrogen-containing carbon material according to the present invention can be produced by a production method including the steps of bringing the carbon material into contact with a first treatment gas containing a fluorine-containing gas to subject a surface of the carbon material to a fluorination treatment; and bringing the carbon material after being subjected to the fluorination treatment into contact with a second treatment gas containing a nitrogen-containing gas with heating to perform a nitriding treatment.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: August 14, 2018
    Assignees: Stella Chemifa Corporation, Tohoku University
    Inventors: Kazuyuki Tohji, Yoshinori Sato, Koji Yokoyama, Kazutaka Hirano, Yoshinori Sato
  • Publication number: 20180072574
    Abstract: A cross-linked structure of a carbon material is excellent in mechanical strength, such as tensile strength. The carbon materials such as carbon nanotube, graphite, fullerene, and carbon nanocoil, are cross-linked with each other. The carbon materials are cross-linked through a linking group derived from a nucleophilic compound having two or more nucleophilic groups in the molecule.
    Type: Application
    Filed: April 22, 2016
    Publication date: March 15, 2018
    Inventors: Yoshinori SATO, Kazutaka HIRANO, Yuki KIKUI
  • Patent number: 9731968
    Abstract: Disclosed is a process for producing a fluoride gas that can produces fluoride gases such as BF3, SiF4, GeF4, PF5 or AsF5 at a reduced production cost in a simple manner. The process is characterized in that a compound containing an atom, which, together with a fluorine atom, can form a polyatomic ion, is added to a hydrogen fluoride solution to produce the polyatomic ion in a hydrogen fluoride solution and to evolve a fluoride gas comprising the fluorine atom and the atom that, together with the fluorine atom, can form a polyatomic ion.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: August 15, 2017
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Masahide Waki, Tatsuhiro Yabune, Kazuhiro Miyamoto, Kazutaka Hirano
  • Patent number: 9376323
    Abstract: An object of the invention is to provide a tetrafluoroborate producing method that allows high-yield, high-efficiency production of a tetrafluoroborate by a continuous process, a tetrafluoroborate-containing electrolyte, and an electrical storage device including such an electrolyte. The invention provides a method for producing a tetrafluoroborate, which includes: a first step including dissolving boron trifluoride gas in an organic solvent; a second step including adding, to the organic solvent, a fluoride (MFn, wherein M represents a metal or NH4, and 1?n?3) in an amount stoichiometrically equivalent to or less than the amount of the boron trifluoride so that a tetrafluoroborate solution is produced; and a third step including circulating the tetrafluoroborate solution through the first step so that the boron trifluoride gas is dissolved in the tetrafluoroborate solution instead of the organic solvent.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: June 28, 2016
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Masahide Waki, Kazuhiro Miyamoto, Kazutaka Hirano
  • Publication number: 20160167968
    Abstract: A nitrogen-containing carbon material to the present invention comprises a carbon material having a carbon skeleton formed of carbon atoms and nitrogen atoms introduced into the carbon material, wherein part of carbon atoms in the carbon skeleton are substituted with nitrogen atoms. The nitrogen-containing carbon material according to the present invention can be produced by a production method including the steps of bringing the carbon material into contact with a first treatment gas containing a fluorine-containing gas to subject a surface of the carbon material to a fluorination treatment; and bringing the carbon material after being subjected to the fluorination treatment into contact with a second treatment gas containing a nitrogen-containing gas with heating to perform a nitriding treatment.
    Type: Application
    Filed: December 16, 2015
    Publication date: June 16, 2016
    Inventors: Kazuyuki Tohji, Yoshinori Sato, Koji Yokoyama, Kazutaka Hirano, Yoshinori Sato
  • Patent number: 9352511
    Abstract: An object of the invention is to provide a method for producing a laminated film comprising at least two resin films bonded together, which is capable of increasing the adhesiveness of the bonding surface and forming a laminated film with high reliability. The method for producing a laminated film according to the invention comprising at least two resin films laminated together, which comprises: a fluorination treatment step comprising bringing a fluorine and oxygen atoms-containing treatment gas into contact with at least a partial region of the surface of at least one of the two resin films to increase the adhesiveness of the region; and a bonding step comprising bonding the two resin films together using, as a bonding surface, the surface that has been brought into contact with the treatment gas.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: May 31, 2016
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Shinji Hashiguchi, Terunori Yamaguchi, Kazutaka Hirano
  • Patent number: 9296613
    Abstract: The invention is directed to a carbon material dispersion, including: a fluorinated carbon material having a fluorinated surface formed by bringing a treatment gas with a fluorine concentration of 0.01 to 100 vol % into contact with a carbon material under conditions at 150 to 600° C.; and a dispersion medium in which the fluorinated carbon material is dispersed.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: March 29, 2016
    Assignees: NATIONAL UNIVERSITY CORPORATION TOHOKU UNIVERSITY, STELLA CHEMIFA CORPORATION
    Inventors: Kazuyuki Tohji, Yoshinori Sato, Shinji Hashiguchi, Kazutaka Hirano
  • Patent number: 9059480
    Abstract: An object is to provide a method of manufacturing a hexafluorophosphate, that can simply and easily manufacture an inexpensive and high-quality hexafluorophosphate while suppressing the manufacturing cost, an electrolytic solution containing a hexafluorophosphate, and an electricity storage device including the electrolytic solution. The present invention relates to a method of manufacturing a hexafluorophosphate, which comprises reacting at least a phosphorus compound with a fluoride represented by MFs.r(HF) (wherein 0?r?6, 1?s?3, and M is at least one kind selected from the group consisting of Li, Na, K, Rb, Cs, NH4, Ag, Mg, Ca, Ba, Zn, Cu, Pb, Al and Fe) to produce a hexafluorophosphate represented by the chemical formula M(PF6)s.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: June 16, 2015
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Masahide Waki, Tatsuhiro Yabune, Kazuhiro Miyamoto, Kazutaka Hirano
  • Patent number: 9034290
    Abstract: An object the invention is to provide a phosphorus pentafluoride producing process wherein phosphorus pentafluoride is separated/extracted from a pentavalent phosphorus compound or a solution thereof, or a composition obtained by allowing the pentavalent phosphorus compound or the solution thereof to react with hydrogen fluoride, thereby producing phosphorus pentafluoride; and a phosphate hexafluoride producing process wherein the resultant phosphorus pentafluoride is used as raw material to produce a phosphate hexafluoride high in purity. The present invention relates to a process for producing phosphorus pentafluoride, wherein a carrier gas is brought into contact with either of the following one: a pentavalent phosphorus compound, a solution thereof, or a solution in which a composition obtained by allowing the pentavalent phosphorus compound or the solution thereof to react with hydrogen fluoride is dissolved, thereby a phosphorus pentafluoride is extracted into the career gas.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: May 19, 2015
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Masahide Waki, Shinji Hashiguchi, Kazutaka Hirano
  • Patent number: 8926787
    Abstract: It is an object of the present invention to provide a surface-modified film which has adhesive properties improved by surface modification and a process for producing the same. It is also an object of the present invention to provide a laminated film in which at least the surface-modified film has been laminated and a process for producing the laminated film. The surface-modified film according to the present invention is characterized by being obtained by bringing a halide complex of an element in Group 13 of the periodic table into contact with at least a part of a region in the surfaces of a resin film.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: January 6, 2015
    Assignee: Stella Chemifa Corporation
    Inventors: Shinji Hashiguchi, Kazutaka Hirano, Tomotsugu Fujimoto
  • Patent number: 8747690
    Abstract: A quaternary ammonium salt of the formula (1), a composition containing the quaternary ammonium salt and an organic solvent, and an electrochemical device using the salt wherein R1 and R2 are both methyl and X? is BF4? or N(CF3SO2)2?.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: June 10, 2014
    Assignees: Otsuka Chemical Co., Ltd., Stella Chemifa Corporation
    Inventors: Tetsuo Nishida, Yasutaka Tashiro, Megumi Tornisaki, Masashi Yamamoto, Kazutaka Hirano, Akihiro Nabeshima, Hiroaki Tokuda, Kenji Sato, Takashi Higono
  • Patent number: 8470278
    Abstract: A method of manufacturing phosphorus pentafluoride and hexafluorophosphate can suppress the manufacturing cost and also can manufacture high-quality phosphorus pentafluoride from an inexpensive and low-quality raw material. The raw material for the method can include at least a phosphorus atom and a fluorine atom. These are brought into contact with a carrier gas, and a phosphorus pentafluoride is extracted and separated into the carrier gas. A method of manufacturing hexafluorophosphate includes reacting fluoride with the resulting phosphorus pentafluoride according to the following chemical reaction scheme: sPF5+AFs?A(PF6)s, in which s is in the range of 1?s?3, and A is at least one of the following: Li, Na, K, Rb, Cs, NH4, Ag, Mg, Ca, Ba, Zn, Cu, Pb, Al and Fe.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: June 25, 2013
    Assignee: Stella Chemifa Corporation
    Inventors: Masahide Waki, Tatsuhiro Yabune, Kazuhiro Miyamoto, Kazutaka Hirano
  • Patent number: 8366956
    Abstract: A quaternary ammonium salt of the formula (1), a composition containing the quaternary ammonium salt and an organic solvent, and an electrochemical device using the salt wherein R1 and R2 are both methyl and X? is BF4? or N(CF3SO2)2?.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: February 5, 2013
    Assignees: Otsuka Chemical Co., Ltd., Stella Chemifa Corporation
    Inventors: Tetsuo Nishida, Yasutaka Tashiro, Megumi Tomisaki, Masashi Yamamoto, Kazutaka Hirano, Akihiro Nabeshima, Hiroaki Tokuda, Kenji Sato, Takashi Higono
  • Publication number: 20130004860
    Abstract: A quaternary ammonium salt of the formula (1), a composition containing the quaternary ammonium salt and an organic solvent, and an electrochemical device using the salt wherein R1 and R2 are both methyl and X? is BF4? or N(CF3SO2)2?.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 3, 2013
    Inventors: Tetsuo NISHIDA, Yasutaka Tashiro, Megumi Tornisaki, Masashi Yamamoto, Kazutaka Hirano, Akihiro Nabeshima, Hiroaki Tokuda, Kenji Sato, Takashi Higono
  • Publication number: 20120186650
    Abstract: It is an object of the present invention to provide a surface-modified film which has adhesive properties improved by surface modification and a process for producing the same. It is also an object of the present invention to provide a laminated film in which at least the surface-modified film has been laminated and a process for producing the laminated film. The surface-modified film according to the present invention is characterized by being obtained by bringing a halide complex of an element in Group 13 of the periodic table into contact with at least a part of a region in the surfaces of a resin film.
    Type: Application
    Filed: September 17, 2010
    Publication date: July 26, 2012
    Applicant: STELLA CHEMIFA CORPORATION
    Inventors: Shinji Hashiguchi, Kazutaka Hirano, Tomotsugu Fujimoto
  • Publication number: 20120082608
    Abstract: An object of the invention is to provide a tetrafluoroborate producing method that allows high-yield, high-efficiency production of a tetrafluoroborate by a continuous process, a tetrafluoroborate-containing electrolyte, and an electrical storage device including such an electrolyte. The invention provides a method for producing a tetrafluoroborate, which includes: a first step including dissolving boron trifluoride gas in an organic solvent; a second step including adding, to the organic solvent, a fluoride (MFn, wherein M represents a metal or NH4, and 1?n?3) in an amount stoichiometrically equivalent to or less than the amount of the boron trifluoride so that a tetrafluoroborate solution is produced; and a third step including circulating the tetrafluoroborate solution through the first step so that the boron trifluoride gas is dissolved in the tetrafluoroborate solution instead of the organic solvent.
    Type: Application
    Filed: June 19, 2009
    Publication date: April 5, 2012
    Applicant: STELLA CHEMIFA CORPORATION
    Inventors: Masahide Waki, Kazuhiro Miyamoto, Kazutaka Hirano