Patents by Inventor Norimitsu Murayama
Norimitsu Murayama 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: 8728965Abstract: Provided is a method for producing a porous material, wherein porosity can be controlled to 50% or higher by means of a freezing method, pore size can be controlled to 10 ?m to 300 ?m, and pore diameter distribution is uniform. The method is a method for producing a porous material, comprising freezing a mixture of water and a raw material comprising at least any of a ceramic material, a resin, a metal, and precursors thereof from a specific portion of the mixture to use ice crystals produced at the time as a pore source and then heat-treating a dry material obtained by removing the ice from the frozen material, wherein the mixture of a raw material and water or the frozen material comprises an antifreeze protein.Type: GrantFiled: March 16, 2011Date of Patent: May 20, 2014Assignee: Nichirei Foods Inc.Inventors: Manabu Fukushima, Yuichi Yoshizawa, Norimitsu Murayama, Sakae Tsuda, Takeshi Koizumi, Toshifumi Inoue
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Publication number: 20130012678Abstract: Provided is a method for producing a porous material, wherein porosity can be controlled to 50% or higher by means of a freezing method, pore size can be controlled to 10 ?m to 300 ?m, and pore diameter distribution is uniform. The method is a method for producing a porous material, comprising freezing a mixture of water and a raw material comprising at least any of a ceramic material, a resin, a metal, and precursors thereof from a specific portion of the mixture to use ice crystals produced at the time as a pore source and then heat-treating a dry material obtained by removing the ice from the frozen material, wherein the mixture of a raw material and water or the frozen material comprises an antifreeze protein.Type: ApplicationFiled: March 16, 2011Publication date: January 10, 2013Applicant: Nichirei Foods Inc.Inventors: Manabu Fukushima, Yuichi Yoshizawa, Norimitsu Murayama, Sakae Tsuda, Takeshi Koizumi, Toshifumi Inoue
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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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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
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Patent number: 6780393Abstract: A method of producing fine particles of an oxide of a metal, comprising the steps of: preparing an acidic solution which contains ions of the metal; precipitating fine particles of a hydroxide of the metal by adding an alkaline solution to the acidic solution; collecting the fine particles of the hydroxide of the metal precipitated in a mixed solution of the acidic solution and the alkaline solution; mixing fine particles of a carbon with the collected fine particles of the hydroxide of the metal; and heat-treating a mixture of the fine particles of the hydroxide of the metal and the fine particles of the carbon at a predetermined temperature in a non-reducing atmosphere, whereby the fine particles of the oxide of the metal are produced.Type: GrantFiled: December 14, 2001Date of Patent: August 24, 2004Assignees: National Institute of Advanced Industrial Science and Technology, Noritake Co., LimitedInventors: Norimitsu Murayama, Woosuck Shin, Sumihito Sago, Makiko Hayashi
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Publication number: 20030056570Abstract: The present invention relates to a flammable gas detection sensor that is a gas detection sensor which converts heat generated by the catalytic reaction between the catalyst component and a flammable gas to a voltage signal by a thermoelectric conversion effect and detects this signal as a detection signal, and is characterized by comprising as constituent elements thereof a catalyst component for initiating a catalytic reaction when in contact with a gas to be detected, and a film of thermoelectric conversion material which converts local temperature differences brought about by heat generated by the reaction to voltage signal; and also relates to a flammable gas concentration measurement method and a measurement apparatus thereof.Type: ApplicationFiled: September 6, 2002Publication date: March 27, 2003Applicant: National Inst. of Advanced Ind. Science and Tech.Inventors: Woosuck Shin, Norimitsu Murayama
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Publication number: 20020119093Abstract: A method of producing fine particles of an oxide of a metal, comprising the steps of: preparing an acidic solution which contains ions of the metal; precipitating fine particles of a hydroxide of the metal by adding an alkaline solution to the acidic solution; collecting the fine particles of the hydroxide of the metal precipitated in a mixed solution of the acidic solution and the alkaline solution; mixing fine particles of a carbon with the collected fine particles of the hydroxide of the metal; and heat-treating a mixture of the fine particles of the hydroxide of the metal and the fine particles of the carbon at a predetermined temperature in a non-reducing atmosphere, whereby the fine particles of the oxide of the metal are produced.Type: ApplicationFiled: December 14, 2001Publication date: August 29, 2002Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Norimitsu Murayama, Woosuck Shin, Sumihito Sago, Makiko Hayashi
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Patent number: 5723799Abstract: The present invention provides metal-based composite with oxide particle dispersion and a method for producing the same.The present invention relates to a method for producing metal-based composite with oxide particle dispersion, comprising sintering of metal-based ultrafine powders (with an average grain size of about 20 nm to 100 nm and a grain size distribution of about 5 nm to 300 nm and with the surface oxidized for handling) in vacuum, in an inert gas or in a reducing atmosphere by rapid sintering, crystallizing the ultrafine powders with a grain size of about 50 nm or less to metal oxide during sintering and simultaneously removing the oxygen on the surface of the ultrafine powders with the grain size of about 50 nm or more, and the metal-based composite with oxide particle dispersion produced according to the said method.Type: GrantFiled: July 5, 1996Date of Patent: March 3, 1998Assignee: Director General of Agency of Industrial Science and TechnologyInventors: Norimitsu Murayama, Yasuyoshi Torii
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Patent number: 5081074Abstract: A joint sintered high-temperature superconductive ceramic article is obtained by joining two sintered high-temperature superconductive ceramic masses formed of oriented crystal grains in such a manner that the directions of grain-orientation are different across the interface of union and pressing the joined ceramic masses against each other perpendicularly to the interface of union and, at the same time, heating them.Type: GrantFiled: March 23, 1990Date of Patent: January 14, 1992Assignee: Agency of Industrial Science & Technology, Ministry of International Trade & IndustryInventors: Norimitsu Murayama, Shuji Sakaguchi, Yasuharu Kodama