Patents by Inventor Noriya Izu
Noriya Izu 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: 9216305Abstract: An object of the present invention is to provide a core-shell-type cerium oxide microparticle, a dispersion solution comprising the microparticle, and a process for production of the microparticle or dispersion solution, and to achieve the object, the present invention provides a core-shell-type cerium oxide microparticle which has an average particle diameter of 30 to 200 nm and a coefficient of variation therein no greater than 0.Type: GrantFiled: October 9, 2007Date of Patent: December 22, 2015Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Noriya Izu, Ichiro Matsubara, Woosuck Shin, Toshio Itoh
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Patent number: 9139745Abstract: The present invention provides an aggregate of spherical core-shell cerium oxide/polymer hybrid nanoparticles, a process for producing the same, and a product such as an anti-reflection film having a high refractive index layer.Type: GrantFiled: July 23, 2010Date of Patent: September 22, 2015Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Noriya Izu, Toshio Uchida, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori
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Patent number: 8846785Abstract: The invention provides a method for manufacturing spherical, monodispersed core-shell type ceria-polymer hybrid nanoparticles including, a mixing step in which a cerium salt and a polymer are mixed together in a high-boiling-point organic solvent to obtain a mixture, and a heating and reflux step in which this mixture is heated and refluxed at a temperature of 110° C. or more to thereby generate a boiling phenomenon in the heating and reflux step, and rapidly cooling the mixture after the heating and reflux step to precipitate cerium oxide, and a liquid dispersion thereof.Type: GrantFiled: December 23, 2009Date of Patent: September 30, 2014Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Noriya Izu, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori, Toshio Uchida
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Patent number: 8647679Abstract: Disclosed herein are core-shell type zinc oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion. As disclosed herein, the core-shell type zinc oxide microparticles have an average particle diameter of from 50 to 1,000 nm. The core is a secondary particle of spherical shape to the surface of which a polymer is attached as a shell. Methods for making the microparticles include the steps of: mixing together a zinc salt and a polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type zinc oxide microparticles to precipitate, wherein the zinc salt is zinc acetate; and uses such as cosmetics, resins and fibers which contain the core-shell type zinc oxide microparticles and have an ultraviolet light blocking action.Type: GrantFiled: February 6, 2009Date of Patent: February 11, 2014Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Noriya Izu, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori
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Publication number: 20120142808Abstract: The present invention provides an aggregate of spherical core-shell cerium oxide/polymer hybrid nanoparticles, a process for producing the same, and a product such as an anti-reflection film having a high refractive index layer.Type: ApplicationFiled: July 23, 2010Publication date: June 7, 2012Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Noriya Izu, Toshio Uchida, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori
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Publication number: 20110003156Abstract: The objects of the present invention are to provide core-shell type cobalt oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion, and the invention is directed at: core-shell type cobalt oxide microparticles having an average particle diameter of from 50 to 200 nm, wherein the core is a secondary particle of spherical shape to a surface of which an organic polymer is attached as the shell; a dispersion of such cobalt oxide microparticles; a dry powder obtained from such a cobalt oxide microparticle dispersion; a process for producing core-shell type cobalt oxide microparticles or a dispersion thereof, which process includes the steps of: mixing together a cobalt salt and an organic polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type cobalt oxide microparticles to precipitate, wherein the cobalt salt is cobalt acetate; and uType: ApplicationFiled: February 6, 2009Publication date: January 6, 2011Inventors: Noriya Izu, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori
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Publication number: 20100330008Abstract: The objects of the present invention are to provide core-shell type zinc oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion, and the invention is directed at: core-shell type zinc oxide microparticles having an average particle diameter of from 50 to 1,000 nm, wherein a core is a secondary particle of spherical shape to the surface of which a polymer is attached as a shell; a dispersion of such zinc oxide microparticles; a dry powder obtained from such a zinc oxide microparticle dispersion; a process for producing core-shell type zinc oxide microparticles or a dispersion thereof, which process includes the steps of: mixing together a zinc salt and a polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type zinc oxide microparticles to precipitate, wherein the zinc salt is zinc acetate; and uses such as cosmetics, resins and fiType: ApplicationFiled: February 6, 2009Publication date: December 30, 2010Inventors: Noriya Izu, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori
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Publication number: 20100209710Abstract: The invention provides a method for manufacturing spherical, monodispersed core-shell type ceria-polymer hybrid nanoparticles including, a mixing step in which a cerium salt and a polymer are mixed together in a high-boiling-point organic solvent to obtain a mixture, and a heating and reflux step in which this mixture is heated and refluxed at a temperature of 110° C. or more to thereby generate a boiling phenomenon in the heating and reflux step, and rapidly cooling the mixture after the heating and reflux step to precipitate cerium oxide, and a liquid dispersion thereof.Type: ApplicationFiled: December 23, 2009Publication date: August 19, 2010Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Noriya IZU, Ichiro Matsubara, Toshio Itoh, Woosuck Shin, Maiko Nishibori, Toshio Uchida
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Publication number: 20100056361Abstract: The present invention is to provide a process for producing a dispersion of fine core/shell type metal oxide particles and the dispersion thereby produced, the present invention are a process for producing a dispersion of fine core/shell type metal oxide particles comprising the steps of mixing a metal salt and a polymer in an organic solvent to obtain a mixture and heating this mixture under reflux at a prescribed temperature to precipitate metal oxide, wherein the metal salt is a nitrate salt or acetate salt and the particle diameter of the fine core/shell type metal oxide particles is adjusted using the molecular weight of the polymer, and a dispersion of fine core/shell type metal oxide particles obtained by the process, which does not undergo sedimentation even after standing for at least one day, and exhibits long-term stability, and a powder thereof.Type: ApplicationFiled: October 4, 2007Publication date: March 4, 2010Applicant: National Institute of Adv Industrial Sci and TechInventors: Noriya Izu, Ichiro Matsubara, Toshio Itoh, Woosuck Shin
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Publication number: 20100015188Abstract: An object of the present invention is to provide a core-shell-type cerium oxide microparticle, a dispersion solution comprising the microparticle, and a process for production of the microparticle or dispersion solution, and to achieve the object, the present invention provides a core-shell-type cerium oxide microparticle which has an average particle diameter of 30 to 200 nm and a coefficient of variation therein no greater than 0.Type: ApplicationFiled: October 9, 2007Publication date: January 21, 2010Applicant: Nat. Ins. of Adv. Industrial Sci. and TechnologyInventors: Noriya Izu, Ichiro Matsubara, Woosuck Shin, Toshio Itoh
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Patent number: 7578974Abstract: A resistance-type oxygen sensor which is provided to be used mainly for measuring the oxygen gas partial pressure of automobile exhaust gas, and which has a short output response time in response to changes in oxygen partial pressure, low resistivity of the oxide semiconductor, and low temperature dependence of the resistivity. In a resistance-type oxygen sensor, in which the oxygen gas detection part comprises an oxide semiconductor, the oxide semiconductor is an oxide comprising cerium ions and hafnium ions, the amount of substance of cerium ions as a percentage of the amount of substance of positive ions is 60 mol % or more, the amount of substance of hafnium ions as a percentage of the amount of substance of positive ions is 3 to 30 mol %, and the hafnium ions are an oxide in solid solution in the parent phase.Type: GrantFiled: October 19, 2005Date of Patent: August 25, 2009Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Noriya Izu, Norimitsu Murayama, Woosuck Shin, Ichiro Matsubara
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Publication number: 20080118404Abstract: The present invention provides a gas sensor element having the characteristic of detecting an aldehyde gas in concentrations of several tens of ppb, a process for manufacturing such a material, and a gas sensor element and the like comprising such a material, and the invention provides a gas sensor material comprising an organic-inorganic hybrid material in which a conductive organic polymer is intercalated between layers of an inorganic compound having a layer structure and from which a conductive organic polymer not intercalated between the layers of the inorganic compound is removed, and provides a process for manufacturing such a gas sensor material, as well as a chemical sensor member, and further the invention allows thus providing a chemical sensor material by which the gas sensor material can detect by itself an aldehyde gas in concentrations of several tens of ppb without using a sensitivity-enhancing element such as a gas-concentrating element.Type: ApplicationFiled: November 14, 2007Publication date: May 22, 2008Applicant: National Inst. of Adv. Industrial Sci and Tech.Inventors: Toshio ITOH, Ichiro Matsubara, Woosuck Shin, Noriya Izu
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Patent number: 7282384Abstract: The present invention provides an SiGe-based thin film, a method for manufacturing this thin film, and applications of this thin film.Type: GrantFiled: November 11, 2003Date of Patent: October 16, 2007Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Woosuck Shin, Fabin Qiu, Noriya Izu, Ichiro Matsubara, Norimitsu Murayama
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Publication number: 20070212263Abstract: The present invention provides a micro thermoelectric gas sensor having a thermoelectric conversion section, a microheater, a catalyst layer formed on the microheater and to be heated by the microheater, which acts as a catalyst for catalytic combustion of a combustible gas, and a sensor detection section with an electrode pattern therefore formed on a membrane of a predetermined thickness, and a method for forming a micropattern of a functional material of a catalyst or resistor in a predetermined position on a substrate in a state in which the microstructure of the functional material remains controlled.Type: ApplicationFiled: March 16, 2005Publication date: September 13, 2007Applicant: NAT. INST. OF ADV. INDUSTRIAL SCI. AND TECH.Inventors: Woosuck Shin, Noriya Izu, Ichiro Matsubara, Norimitsu Murayama, Kazuki Tajima, Fabin Qiu, Zhihui Zhao
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Patent number: 7236083Abstract: The present invention provides a resistance-type oxygen sensor, and an oxygen sensor device and an air/fuel ratio control system using same. The present invention relates to a resistance-type oxygen sensor with suppressed temperature dependence, wherein: (1) a gas detection unit composed of an oxide semiconductor with a resistance value varying according to temperature and the oxygen partial pressure of atmospheric gas and a temperature compensation unit composed of a conductor with suppressed dependence of a resistance value on oxygen partial pressure are connected in series; (2) the temperature compensation unit is composed of an oxygen ion conductor; and (3) an electrode for electric contact with the temperature compensation unit is exposed to the atmospheric gas and is a porous body; an oxygen sensor device and an air/fuel ratio control system.Type: GrantFiled: June 25, 2003Date of Patent: June 26, 2007Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Noriya Izu, Woosuck Shin, Norimitsu Murayama
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Publication number: 20060081473Abstract: A resistance-type oxygen sensor which is provided to be used mainly for measuring the oxygen gas partial pressure of automobile exhaust gas, and which has a short output response time in response to changes in oxygen partial pressure, low resistivity of the oxide semiconductor, and low temperature dependence of the resistivity. In a resistance-type oxygen sensor, in which the oxygen gas detection part comprises an oxide semiconductor, the oxide semiconductor is an oxide comprising cerium ions and hafnium ions, the amount of substance of cerium ions as a percentage of the amount of substance of positive ions is 60 mol % or more, the amount of substance of hafnium ions as a percentage of the amount of substance of positive ions is 3 to 30 mol %, and the hafnium ions are an oxide in solid solution in the parent phase.Type: ApplicationFiled: October 19, 2005Publication date: April 20, 2006Applicant: National Institute of Adv. Industrial Sci. & Tech.Inventors: Noriya Izu, Norimitsu Murayama, Woosuck Shin, Ichiro Matsubara
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Publication number: 20060063291Abstract: The present invention provides an SiGe-based thin film, a method for manufacturing this thin film, and applications of this thin film.Type: ApplicationFiled: November 11, 2003Publication date: March 23, 2006Applicant: National Institute of Adv. Industrial Sci. & TechInventors: Woosuck Shin, Fabin Qiu, Noriya Izu, Ichiro Matsubara, Norimitsu Murayama
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Publication number: 20060057292Abstract: The present invention provides a method of manufacturing a porous thick film of an oxide that has extremely few cracks and can be satisfactorily used as an oxygen partial pressure detecting part of an oxygen sensor.Type: ApplicationFiled: December 22, 2003Publication date: March 16, 2006Applicant: National Institute of Adv. Industrial Sci. & TechInventors: Noriya Izu, Woosuck Shin, Ichiro Matsubara, Norimitsu Murayama, Yukihiko Yamauchi, Shuzo Kanzaki
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Publication number: 20050236271Abstract: The present invention provides a resistance-type oxygen sensor, and an oxygen sensor device and an air/fuel ratio control system using same. The present invention relates to a resistance-type oxygen sensor with suppressed temperature dependence, wherein: (1) a gas detection unit composed of an oxide semiconductor with a resistance value varying according to temperature and the oxygen partial pressure of atmospheric gas and a temperature compensation unit composed of a conductor with suppressed dependence of a resistance value on oxygen partial pressure are connected in series; (2) the temperature compensation unit is composed of an oxygen ion conductor; and (3) an electrode for electric contact with the temperature compensation unit is exposed to the atmospheric gas and is a porous body; an oxygen sensor device and an air/fuel ratio control system.Type: ApplicationFiled: June 25, 2003Publication date: October 27, 2005Applicant: National Institute of Advanced Indust Sci & TechInventors: Noriya Izu, Woosuck Shin, Norimitsu Murayama
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Publication number: 20040179970Abstract: A gas sensor comprising a sensor element including an organic-inorganic hybrid material. The sensor element has layers of an inorganic compound and an organic compound intercalated between the layers of an inorganic compound.Type: ApplicationFiled: March 10, 2004Publication date: September 16, 2004Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Ichiro Matsubara, Norimitsu Murayama, Woosuck Shin, Noriya Izu, Kouta Hosono