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).
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Patent number: 11426700Abstract: A method for producing a gas separation membrane containing fine particles uniformly dispersed in a resin, including the following (A) and (B): (A) a step of mixing the fine particles with a matrix resin, the amount of the fine particles with respect to the entire mass of the mixture being adjusted to 1 mass % to 50 mass %, to thereby prepare a master batch; and (B) a step including dissolving the master batch in a solvent, applying the prepared solution onto a substrate, and evaporating the solvent.Type: GrantFiled: May 15, 2019Date of Patent: August 30, 2022Assignee: NISSAN CHEMICAL CORPORATIONInventors: Kazutoshi Odaka, Tadayuki Isaji, Yuji Horiuchi
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Patent number: 11279624Abstract: 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: GrantFiled: April 25, 2018Date of Patent: March 22, 2022Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Takashi Ogihara, Takayuki Kodera
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Publication number: 20210292168Abstract: An alkali metal amide is dissolved in a cyclic alkylene urea represented by the formula (1) (wherein each of R1 and R2 represents a C1 to C3 alkyl group, and R3 represents a C1 to C4 alkylene group).Type: ApplicationFiled: August 20, 2019Publication date: September 23, 2021Applicants: NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, NISSAN CHEMICAL CORPORATIONInventors: Kiyoharu TADANAGA, Akira MIURA, Tadayuki ISAJI, Shinichi MAEDA
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Publication number: 20210236996Abstract: A method for producing a gas separation membrane containing fine particles uniformly dispersed in a resin, including the following (A) and (B): (A) a step of mixing the fine particles with a matrix resin, the amount of the fine particles with respect to the entire mass of the mixture being adjusted to 1 mass % to 50 mass %, to thereby prepare a master batch; and (B) a step including dissolving the master batch in a solvent, applying the prepared solution onto a substrate, and evaporating the solvent.Type: ApplicationFiled: May 15, 2019Publication date: August 5, 2021Applicant: NISSAN CHEMICAL CORPORATIONInventors: Kazutoshi ODAKA, Tadayuki ISAJI, Yuji HORIUCHI
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Patent number: 11066599Abstract: 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: GrantFiled: January 25, 2017Date of Patent: July 20, 2021Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Naoki Otani, Shinichi Maeda, Masahiro Ueda, Takayoshi Kawasaki
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Patent number: 11052355Abstract: 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: GrantFiled: August 21, 2017Date of Patent: July 6, 2021Assignees: NISSAN CHEMICAL CORPORATION, TOKYO METROPOLITAN UNIVERSITYInventors: Hiroyoshi Kawakami, Manabu Tanaka, Yuri Kameyama, Yuki Kudo, Hiroto Mikami, Tadayuki Isaji, Kazutoshi Odaka, Takamasa Kikuchi
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Patent number: 11041120Abstract: 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: GrantFiled: September 17, 2019Date of Patent: June 22, 2021Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Naoki Otani, Masahiro Ueda, Takayoshi Kawasaki
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Patent number: 10906009Abstract: 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 (bType: GrantFiled: April 17, 2017Date of Patent: February 2, 2021Assignees: NISSAN CHEMICAL CORPORATION, TOKYO METROPOLITAN UNIVERSITYInventors: Hiroyoshi Kawakami, Manabu Tanaka, Yuri Kameyama, Azusa Osawa, Tadayuki Isaji, Takamasa Kikuchi
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Patent number: 10767109Abstract: 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: GrantFiled: February 2, 2016Date of Patent: September 8, 2020Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Naoki Otani, Masahiro Ueda, Takayoshi Kawasaki
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Publication number: 20200024511Abstract: 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: ApplicationFiled: September 17, 2019Publication date: January 23, 2020Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Naoki OTANI, Masahiro UEDA, Takayoshi KAWASAKI
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Patent number: 10501637Abstract: 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: GrantFiled: August 6, 2015Date of Patent: December 10, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Masahiro Hida
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Publication number: 20190367719Abstract: 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: ApplicationFiled: January 17, 2018Publication date: December 5, 2019Applicants: UNIVERSITY OF FUKUI, NISSAN CHEMICAL CORPORATIONInventors: Koji Nakane, Shuya Gao, Akiyoshi Ogoshi, Takeshi Suwa, Tadayuki Isaji, Masaaki Ozawa
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Publication number: 20190184345Abstract: 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: ApplicationFiled: August 21, 2017Publication date: June 20, 2019Applicants: NISSAN CHEMICAL CORPORATION, TOKYO METROPOLITAN UNIVERSITYInventors: Hiroyoshi KAWAKAMI, Manabu TANAKA, Yuri KAMEYAMA, Yuuki KUDO, Hiroto MIKAMI, Tadayuki ISAJI, Kazutoshi ODAKA, Takamasa KIKUCHI
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Publication number: 20190083942Abstract: 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) witType: ApplicationFiled: April 17, 2017Publication date: March 21, 2019Applicants: NISSAN CHEMICAL CORPORATION, TOKYO METROPOLITAN UNIVERSITYInventors: Hiroyoshi KAWAKAMI, Manabu TANAKA, Yuri KAMEYAMA, Azusa OSAWA, Tadayuki ISAJI, Takamasa KIKUCHI
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Patent number: 10232335Abstract: 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: GrantFiled: December 16, 2015Date of Patent: March 19, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hirokazu Kato, Tadayuki Isaji, Yoshiyuki Kashima, Jun-ichi Nakajima
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Publication number: 20190055466Abstract: 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: ApplicationFiled: January 25, 2017Publication date: February 21, 2019Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Naoki OTANI, Shinichi MAEDA, Masahiro UEDA, Takayoshi KAWASAKI
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Publication number: 20180244530Abstract: 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: ApplicationFiled: April 25, 2018Publication date: August 30, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Takashi OGIHARA, Takayuki KODERA
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Patent number: 9988278Abstract: 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: GrantFiled: March 24, 2015Date of Patent: June 5, 2018Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Takashi Ogihara, Takayuki Kodera
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Publication number: 20180022994Abstract: 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: ApplicationFiled: February 2, 2016Publication date: January 25, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Naoki OTANI, Masahiro UEDA, Takayoshi KAWASAKI
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Publication number: 20180001292Abstract: 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: ApplicationFiled: December 16, 2015Publication date: January 4, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Hirokazu KATO, Tadayuki ISAJI, Yoshiyuki KASHIMA, Jun-ichi NAKAJIMA