Patents by Inventor Tadayuki Isaji

Tadayuki Isaji 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: 10767109
    Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: September 8, 2020
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki Isaji, Naoki Otani, Masahiro Ueda, Takayoshi Kawasaki
  • Publication number: 20200024511
    Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.
    Type: Application
    Filed: September 17, 2019
    Publication date: January 23, 2020
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki ISAJI, Naoki OTANI, Masahiro UEDA, Takayoshi KAWASAKI
  • Patent number: 10501637
    Abstract: The invention provides silane-treated forsterite microparticles having a specific surface area of 5 to 100 m2/g, wherein 1 to 5 silyl groups are bound to 1 nm2 of the surface area thereof.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: December 10, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki Isaji, Masahiro Hida
  • Publication number: 20190367719
    Abstract: Provided are: a material having high thermal conductivity that includes an alumina fiber sheet and a resin, wherein the material having high thermal conductivity includes 20-90% by mass of the alumina fiber sheet; and a method for producing a material having high thermal conductivity, the method including (1) a step for preparing a fiber sheet that includes an alumina source by electrostatic spinning or dry spinning in which a dispersion including an alumina source and a water-soluble polymer is used as a spinning material, (2) a step for firing the fiber sheet including an alumina source to prepare an alumina fiber sheet, and (3) a step for impregnating the alumina fiber sheet with a resin solution having a resin concentration of 10% by weight or less.
    Type: Application
    Filed: January 17, 2018
    Publication date: December 5, 2019
    Applicants: UNIVERSITY OF FUKUI, NISSAN CHEMICAL CORPORATION
    Inventors: Koji Nakane, Shuya Gao, Akiyoshi Ogoshi, Takeshi Suwa, Tadayuki Isaji, Masaaki Ozawa
  • Publication number: 20190184345
    Abstract: A gas separation membrane containing a matrix resin and hyperbranched polymer- or dendrimer-bound, heteromorphous shaped silica nanoparticles, which are formed of heteromorphous shaped silica nanoparticles having surfaces onto which a hyperbranched polymer or a dendrimer is chemically added.
    Type: Application
    Filed: August 21, 2017
    Publication date: June 20, 2019
    Applicants: NISSAN CHEMICAL CORPORATION, TOKYO METROPOLITAN UNIVERSITY
    Inventors: Hiroyoshi KAWAKAMI, Manabu TANAKA, Yuri KAMEYAMA, Yuuki KUDO, Hiroto MIKAMI, Tadayuki ISAJI, Kazutoshi ODAKA, Takamasa KIKUCHI
  • Publication number: 20190083942
    Abstract: A method for producing a gas separation membrane, including the following steps: step(a): treating the surfaces of silica nanoparticles dispersed in a first solvent with a reactive functional group-containing compound, while nanoparticles are being dispersed in the solvent, to thereby prepare a first solvent dispersion of reactive functional group-modified silica nanoparticles; step(b): replacing the first solvent dispersion's dispersion medium of reactive functional group-modified silica nanoparticles prepared in step(a) with a second solvent without drying of dispersion medium, and then reacting functional group-modified silica nanoparticles with dendrimer-forming monomer or hyperbranched polymer-forming monomer in the second solvent's presence so that dendrimer or hyperbranched polymer is added to reactive functional group, to thereby prepare dendrimer- or hyperbranched polymer-bound silica nanoparticles; step(c): mixing dendrimer- or hyperbranched polymer-bound silica nanoparticles prepared in step(b) wit
    Type: Application
    Filed: April 17, 2017
    Publication date: March 21, 2019
    Applicants: NISSAN CHEMICAL CORPORATION, TOKYO METROPOLITAN UNIVERSITY
    Inventors: Hiroyoshi KAWAKAMI, Manabu TANAKA, Yuri KAMEYAMA, Azusa OSAWA, Tadayuki ISAJI, Takamasa KIKUCHI
  • Patent number: 10232335
    Abstract: The ?-eucryptite fine particle production method of the invention includes spraying, into an atmosphere at 50° C. to a temperature lower than 300° C., a solution containing a water-soluble lithium salt, a water-soluble aluminum salt, and colloidal silica, in such amounts that the mole proportions among lithium atoms, aluminum atoms, and silicon atoms (Li:Al:Si) are adjusted to 1:1:1, to thereby dry the solution, and, subsequently, firing the dried product in air at 600 to 1,300° C.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: March 19, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hirokazu Kato, Tadayuki Isaji, Yoshiyuki Kashima, Jun-ichi Nakajima
  • Publication number: 20190055466
    Abstract: Provided is a production method for a carbon-based light-emitting material that generates light having a wavelength of 500 to 700 nm when exposed to excitation light having a wavelength of 300 to 600 nm. The production method comprises a step for mixing and heating a starting material containing ascorbic acid, an acid catalyst containing an inorganic acid, and a solvent.
    Type: Application
    Filed: January 25, 2017
    Publication date: February 21, 2019
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki ISAJI, Naoki OTANI, Shinichi MAEDA, Masahiro UEDA, Takayoshi KAWASAKI
  • Publication number: 20180244530
    Abstract: A method for producing forsterite microparticles having a primary particle size of 1, to 50 nm, as determined through electron microscopy. The method includes spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.
    Type: Application
    Filed: April 25, 2018
    Publication date: August 30, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki ISAJI, Takashi OGIHARA, Takayuki KODERA
  • Patent number: 9988278
    Abstract: A method for producing forsterite microparticles having a primary particle size of 1 to 200 nm, as determined through electron microscopy, characterized in that the method includes spray-drying, at 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: June 5, 2018
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki Isaji, Takashi Ogihara, Takayuki Kodera
  • Publication number: 20180022994
    Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.
    Type: Application
    Filed: February 2, 2016
    Publication date: January 25, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki ISAJI, Naoki OTANI, Masahiro UEDA, Takayoshi KAWASAKI
  • Publication number: 20180001292
    Abstract: The ?-eucryptite fine particle production method of the invention includes spraying, into an atmosphere at 50° C. to a temperature lower than 300° C., a solution containing a water-soluble lithium salt, a water-soluble aluminum salt, and colloidal silica, in such amounts that the mole proportions among lithium atoms, aluminum atoms, and silicon atoms (Li:Al:Si) are adjusted to 1:1:1, to thereby dry the solution, and, subsequently, firing the dried product in air at 600 to 1,300° C.
    Type: Application
    Filed: December 16, 2015
    Publication date: January 4, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hirokazu KATO, Tadayuki ISAJI, Yoshiyuki KASHIMA, Jun-ichi NAKAJIMA
  • Publication number: 20170190916
    Abstract: The invention provides silane-treated forsterite microparticles having a specific surface area of 5 to 100 m2/g, wherein 1 to 5 silyl groups are bound to 1 nm2 of the surface area thereof.
    Type: Application
    Filed: August 6, 2015
    Publication date: July 6, 2017
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki ISAJI, Masahiro HIDA
  • Publication number: 20160332887
    Abstract: A method for producing forsterite microparticles having a primary particle size of 1 to 200 nm, as determined through electron microscopy, characterized in that the method includes spray-drying, at 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.
    Type: Application
    Filed: March 24, 2015
    Publication date: November 17, 2016
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Tadayuki ISAJI, Takashi OGIHARA, Takayuki KODERA
  • Patent number: 8158030
    Abstract: This invention provides a process for producing a dispersion liquid of an intrinsic electroconductive polymer in an organic solvent, comprising a deionization step of deionizing an aqueous colloid dispersion liquid of an intrinsic electroconductive polymer by a liquid feeding method to remove cations adsorbed on the intrinsic electroconductive polymer, a solvent displacement step of subjecting water in the aqueous colloid dispersion liquid after the deionization step to solvent displacement with an organic solvent (excluding N-methylpyrrolidone and dimethyl sulfoxide), and an additive treatment step of, after the solvent displacement step, adding N-methylpyrrolidone or dimethyl sulfoxide.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: April 17, 2012
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Tadayuki Isaji, Satoshi Fujita
  • Publication number: 20110135939
    Abstract: Disclosed is a conductive coating composition containing an organic solvent dispersion of an intrinsically conductive polymer such as a doped polyaniline or a doped polythiophene, and a binder. The conductive coating composition is characterized in that the binder contains a polymerizable monomer-dispersed silica sol, which is obtained by dispersing a colloidal silica into a polymerizable organic compound monomer. The composition provides a conductive thin film having high transparency and excellent strength.
    Type: Application
    Filed: July 27, 2009
    Publication date: June 9, 2011
    Inventors: Tadayuki Isaji, Naohiko Suemura, Shigeru Mitsui
  • Patent number: 7718708
    Abstract: There is provided a sol in which surface-modified colloidal particles are dispersed in a liquid, wherein the surface-modified colloidal particles are obtained by using anhydrous zinc antimonate colloidal particles, metal oxides comprising tin atom, zinc atom, antimony atom and oxygen atom, or tin oxide-doped anhydrous zinc antimonate colloidal particles as nuclei, and by coating the surface of the nuclei with an aluminum-containing substance (e.g., an aluminum chelating agent), a polymer type surfactant (e.g., a polycarboxylic acid ester or polyethylene glycol monoaliphatic acid ester surfactant) or both of them. The anhydrous zinc antimonate sol is used for several purposes such as transparent antistatic materials in the form of resin, plastic, glass, paper, magnetic tape or the like, transparent UV absorbers, transparent heat radiation absorbers, high refractive index hard coating agent, anti-reflective agent and the like.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: May 18, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Osamu Tanegashima, Tadayuki Isaji, Osamu Fujimoto
  • Publication number: 20100038596
    Abstract: This invention provides a process for producing a dispersion liquid of an intrinsic electroconductive polymer in an organic solvent, comprising a deionization step of deionizing an aqueous colloid dispersion liquid of an intrinsic electroconductive polymer by a liquid feeding method to remove cations adsorbed on the intrinsic electroconductive polymer, a solvent displacement step of subjecting water in the aqueous colloid dispersion liquid after the deionization step to solvent displacement with an organic solvent (excluding N-methylpyrrolidone and dimethyl sulfoxide), and an additive treatment step of, after the solvent displacement step, adding N-methylpyrrolidone or dimethyl sulfoxide.
    Type: Application
    Filed: December 8, 2006
    Publication date: February 18, 2010
    Applicant: NISSAN CHEMICAL INDUSTRIES , LTD.
    Inventors: Tadayuki Isaji, Satoshi Fujita
  • Publication number: 20090154059
    Abstract: The present invention relates to compositions capable of forming a coating and comprising a mixture of a conductive polymer in colloidal form and carbon, methods for their manufacture and use for high-capacity electrical double layer capacitors to be utilized in various electronic apparatuses, power supplies and the like.
    Type: Application
    Filed: March 17, 2005
    Publication date: June 18, 2009
    Applicants: Ormecon GMBH, Nissan Chemical Industries, Ltd,
    Inventors: Bernhard Wessling, Hitoshi Furusho, Mitsunobu Matsumura, Tadayuki Isaji
  • Publication number: 20090078307
    Abstract: A three-pole two-layer photo-rechargeable battery has a laminated two-layered structure that includes a solar battery cell, a storage cell, and a common electrode therebetween. The solar battery cell has a structure wherein a photo-electrode, which has a photo-sensitized dye and a semiconductor layer on a conductive substrate with optical transparency, counters via a first electrolytic solution a common electrode that has a catalyst layer on a conductive substrate. The storage cell has a structure wherein the common electrode, which has a first conductive polymer layer on a conductive substrate on a side opposite the catalyst layer, counters via a second electrolytic solution a storage cell counter electrode that has a second conductive polymer layer on a conductive substrate.
    Type: Application
    Filed: March 25, 2008
    Publication date: March 26, 2009
    Applicants: THE UNIVERSITY OF TOKYO, NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Hiroshi Segawa, Yosuke Saito, Satoshi Uchida, Takaya Kubo, Satoshi Fujita, Tadayuki Isaji