Patents by Inventor Kazuhiko Koike
Kazuhiko Koike 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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Publication number: 20160122796Abstract: A method for examining microorganisms has a sampling preparation step including a fluorescence staining step of stirring and mixing certain amounts of a sample and a fluorescence staining reagent, a still standing step of leaving the solution after the fluorescence staining step to still stand for a certain time, and a dilution step of diluting the solution after the still standing step with a liquid that emits no fluorescence.Type: ApplicationFiled: May 16, 2014Publication date: May 5, 2016Inventors: Yukio Hosaka, Shinya Fushida, Akiko Nakata, Kazuhiko Koike
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Patent number: 8389429Abstract: A composite ceramic body with increased strength is disclosed. The composite ceramic body, composed of a matrix of alumina particles with a mean particle diameter ranging from 0.7 to 1.8 ?m and nano-zirconia particles with a particle diameter of 0.15 ?m or less, wherein the alumina particles and the nano-zirconia particles fall in a respective weight percentage ratio ranging from 80:20 to 95:5 with a relative density of 93% or more and wherein in a cross section, a total sum of surface areas of pores, having cross-sectional areas equal to or greater than surface areas of circles having the same diameters as a mean particle diameter of the alumina particles, falls in a value of 2.2% or less based on a whole of the cross-sectional areas.Type: GrantFiled: June 18, 2009Date of Patent: March 5, 2013Assignees: Nippon Soken, Inc., Denso CorporationInventors: Kazuhiko Koike, Masayuki Kobayashi
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Patent number: 7855162Abstract: The present invention provides a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a base material is a high specific surface area porous cordierite body that is stable at high temperatures, and also provides methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body. The present invention relates to a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a base material is a high temperature-stable, high specific surface area porous cordierite body comprising a porous structure having a prescribed porosity and formed of a needle-shaped cordierite crystal phase, and further relates to methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body, and by using porous cordierite constituted of needle-shaped crystals as a catalyst-supporting honeycomb structure, the present invention is able to inhibit sintering-induced reduction in the specific surface area.Type: GrantFiled: December 13, 2004Date of Patent: December 21, 2010Assignees: National Institute of Advanced Industrial Science and Technology, Denso Corporation, Nippon Soken, Inc.Inventors: Jayaseelan Daniel Doni, Hideki Kita, Naoki Kondo, Shunkichi Ueno, Tatsuki Ohji, Shuzo Kanzaki, Kazuhiko Koike, Takumi Suzawa, Tomohiko Nakanishi
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Patent number: 7838462Abstract: A needle-shaped ceramic body having as its base material a cordierite porous body having a high specific surface area and superior thermal shock resistance, and a needle-shaped catalyst-ceramic body are provided. The present invention relates to a needle-shaped ceramic body having as its base material a needle-shaped cordierite in which the tips thereof are rounded, a needle-shaped catalyst-ceramic body loaded with a catalyst, and a method of production of a ceramic body in which a portion of a raw material (fluoride) gasified by a reaction between raw materials is grown into a needle like shape on the metal catalyst (Fe), wherein the tips of needle-shaped particles are rounded, using a vapor-liquid-solid (VLS) reaction, in a raw material burning process.Type: GrantFiled: January 27, 2006Date of Patent: November 23, 2010Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Hideki Kita, Jayaseelan Daniel Doni, Naoki Kondo, Shunkichi Ueno, Kazuhiko Koike, Keiichi Yamada, Tomohiko Nakanishi
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Publication number: 20100200427Abstract: A solid electrolyte is made of zirconia grains containing yttria and alumina grains dispersed in the zirconia grains. In the solid electrolyte, the yttria content per zirconia content is within a range of 2 to 10 mol. %, the relative density is not less than 93%, and the average particle size Rz of the zirconia grains is not more than 2 ?m, an average particle size Ra of the alumina grains is not more than 1 ?m. The average particle size Ra of the alumina grains is smaller than the average particle size Rz of the zirconia grains. An average distance value ALa between the alumina grains is not more than 2 ?m, and a standard deviation SLa thereof is not more than 0.8. The solid electrolyte satisfies a relationship of (SLa/ALa)×Rz?0.9.Type: ApplicationFiled: February 4, 2010Publication date: August 12, 2010Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Kazuhiko Koike, Kiyomi Kobayashi
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Patent number: 7723263Abstract: A ceramic support capable of supporting a catalyst comprising a ceramic body having fine pores with a diameter or width up to 1000 times the ion diameter of a catalyst component to be supported on the surface of the ceramic body, the number of the fine pores being not less than 1×1011 pores per liter, is produced by introducing oxygen vacancies or lattice defects in the cordierite crystal lattice or by applying a thermal shock to form fine cracks.Type: GrantFiled: December 20, 2006Date of Patent: May 25, 2010Assignees: Nippon Soken, Inc., Denso CorporationInventors: Kazuhiko Koike, Tomohiko Nakanishi, Takeshi Ueda, Masakazu Tanaka
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Publication number: 20090318281Abstract: A composite ceramic body with increased strength is disclosed. The composite ceramic body, composed of a matrix of alumina particles with a mean particle diameter ranging from 0.7 to 1.8 ?m and nano-zirconia particles with a particle diameter of 0.15 ?m or less, wherein the alumina particles and the nano-zirconia particles fall in a respective weight percentage ratio ranging from 80:20 to 95:5 with a relative density of 93% or more and wherein in a cross section, a total sum of surface areas of pores, having cross-sectional areas equal to or greater than surface areas of circles having the same diameters as a mean particle diameter of the alumina particles, falls in a value of 2.2% or less based on a whole of the cross-sectional areas.Type: ApplicationFiled: June 18, 2009Publication date: December 24, 2009Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Kazuhiko Koike, Masayuki Kobayashi
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Patent number: 7605110Abstract: A ceramic body, a ceramic catalyst body, a ceramic catalyst body and related manufacturing methods are disclosed wherein a cordierite porous base material has a surface, formed with acicular particles made of a component different from that of cordierite porous base material, which has an increased specific surface area with high resistance to a sintering effect. The ceramic body is manufactured by preparing a slurry containing an acicular particle source material, preparing a porous base material, applying the slurry onto a surface of the porous base material and firing the porous base material, whose surface is coated with the slurry, to cause acicular particles to develop on the surface of the porous base material. A part of or a whole of surfaces of the acicular particles is coated with a constituent element different from that of the acicular particles.Type: GrantFiled: April 5, 2007Date of Patent: October 20, 2009Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Keiichi Yamada, Kazuhiko Koike, Katsumi Yoshida, Hideki Kita, Naoki Kondo, Hideki Hyuga
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Publication number: 20090000352Abstract: A gas sensing element for detecting a specified gas concentration in measuring gases is disclosed. The gas sensing element has at least a surface layer portion formed with an alumina composite sintered body having a principal component of alumina. The alumina composite sintered body contains alumina particles and dispersion particles, dispersed in a boundary between the alumina particles or in the alumina particles, which have an average particle diameter smaller than that of the alumina particles. The dispersion particles have particle-to-particle distances with an average of 4 ?m or less and a standard deviation of 1.8 or less. The dispersion particles have particle diameters with an average of 0.2 ?m or less and a standard deviation of 0.05 or less.Type: ApplicationFiled: June 25, 2008Publication date: January 1, 2009Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Kazuhiko Koike, Akio Tanaka
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Patent number: 7358210Abstract: A ceramic body that can support a required amount of catalyst component, without lowering the characteristics such as strength, manufactured without forming a coating layer and providing a high performance ceramic catalyst body that is excellent in practical utility and durability. This ceramic body is made by substituting at least one of the constituent elements of cordierite that constitutes the substrate ceramic, for example Al, with W that is the element having an empty orbit in d or f orbit, has high bonding strength and is less susceptible to deterioration since the catalyst component Pt is supported by means of chemical bonding.Type: GrantFiled: March 22, 2002Date of Patent: April 15, 2008Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Masakazu Tanaka, Tomomi Hase, Takashi Kondo, Tosiharu Kondo, Hiromi Sano, Jun Hasegawa, Miho Ito, Tomohiko Nakanishi, Kazuhiko Koike, Takumi Suzawa
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Publication number: 20070254808Abstract: A ceramic body, a ceramic catalyst body, a ceramic catalyst body and related manufacturing methods are disclosed wherein a cordierite porous base material has a surface, formed with acicular particles made of a component different from that of cordierite porous base material, which has an increased specific surface area with high resistance to a sintering effect. The ceramic body is manufactured by preparing a slurry containing an acicular particle source material, preparing a porous base material, applying the slurry onto a surface of the porous base material and firing the porous base material, whose surface is coated with the slurry, to cause acicular particles to develop on the surface of the porous base material. A part of or a whole of surfaces of the acicular particles is coated with a constituent element different from that of the acicular particles.Type: ApplicationFiled: April 5, 2007Publication date: November 1, 2007Applicants: DENSO CORPORATION, Nippon Soken, Inc.Inventors: Keiichi Yamada, Kazuhiko Koike, Katsumi Yoshida, Hideki Kita, Naoki Kondo, Hideki Hyuga
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Publication number: 20070254804Abstract: The present invention provides a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a case material is a high specific surface area porous cordierite body that is stable at high temperatures, and also provides methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body. The present invention relates to a needle-shaped ceramic body and needle-shaped ceramic catalyst body in which a base material is a high temperature-stable, high specific surface area porous cordierite body comprising a porous structure having a prescribed porosity and formed of a needle-shaped cordierite crystal phase and further relates to methods of producing this needle-shaped ceramic body and needle-shaped ceramic catalyst body, and by using porous cordierite constituted of needle-shaped crystals as a catalyst-supporting honeycomb structure, the present invention is able to inhibit sintering-induced reduction in the specific surface area.Type: ApplicationFiled: December 13, 2004Publication date: November 1, 2007Applicants: National Instof Adv Industrial Science and Tech, Denso Corporation, Nippon Soken, IncInventors: Jayaseelan Daniel Doni, Hideki Kita, Naoki Kondo, Shunkichi Ueno, Tatsuki Ohji, Shuzo Kanzaki, Kazuhiko Koike, Takumi Suzawa, Tomohiko Nakanishi
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Publication number: 20070173403Abstract: A ceramic support capable of supporting a catalyst comprising a ceramic body having fine pores with a diameter or width up to 1000 times the ion diameter of a catalyst component to be supported on the surface of the ceramic body, the number of the fine pores being not less than 1×1011 pores per liter, is produced by introducing oxygen vacancies or lattice defects in the cordierite crystal lattice or by applying a thermal shock to form fine cracks.Type: ApplicationFiled: December 20, 2006Publication date: July 26, 2007Applicants: Nippon Soken, Inc., Denso CorporationInventors: Kazuhiko Koike, Tomohiko Nakanishi, Takeshi Ueda, Masakazu Tanaka
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Patent number: 7223716Abstract: A ceramic support capable of supporting a catalyst comprising a ceramic body having fine pores with a diameter or width up to 1000 times the ion diameter of a catalyst component to be supported on the surface of the ceramic body, the number of the fine pores being not less than 1×1011 pores per liter, is produced by introducing oxygen vacancies or lattice defects in the cordierite crystal lattice or by applying a thermal shock to form fine cracks.Type: GrantFiled: April 10, 2000Date of Patent: May 29, 2007Assignees: Nippon Soken, Inc., Denso CorporationInventors: Kazuhiko Koike, Tomohiko Nakanishi, Takeshi Ueda, Masakazu Tanaka
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Patent number: 7211540Abstract: This invention is directed to providing a high-performance ceramic support being capable of realizing early activation of a catalyst due to direct loading while maintaining the excellent properties of the substrate ceramic, and being less susceptible to heat deterioration, by specifying the kind and combination of optimal replacing elements and the replacing amount and the like. A ceramic support comprising a substrate ceramic containing Mg, Al, Si and O as constituent elements are solid-dissolved therein Ti and W as the second component. The proportion of cordierite crystal having solid-dissolved therein W and Ti is 25 mol % or more, whereby a high-performance directly supporting ceramic support is realized.Type: GrantFiled: June 28, 2004Date of Patent: May 1, 2007Assignees: Nippon Soken, Inc., Denso CorporationInventors: Tomohiko Nakanishi, Kazuhiko Koike, Tomomi Hase
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Publication number: 20060178265Abstract: A needle-shaped ceramic body having as its base material a cordierite porous body having a high specific surface area and superior thermal shock resistance, and a needle-shaped catalyst-ceramic body are provided. The present invention relates to a needle-shaped ceramic body having as its base material a needle-shaped cordierite in which the tips thereof are rounded, a needle-shaped catalyst-ceramic body loaded with a catalyst, and a method of production of a ceramic body in which a portion of a raw material (fluoride) gasified by a reaction between raw materials is grown into a needle like shape on the metal catalyst (Fe), wherein the tips of needle-shaped particles are rounded, using a vapor-liquid-solid (VLS) reaction, in a raw material burning process.Type: ApplicationFiled: January 27, 2006Publication date: August 10, 2006Applicants: Nat Institute of Advanced Indust Science & Tech., DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Hideki Kita, Jayaseelan Doni, Naoki Kondoh, Shunkichi Ueno, Kazuhiko Koike, Keiichi Yamada, Tomohiko Nakanishi
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Patent number: 7084091Abstract: This invention provides a method for producing a ceramic catalyst body that can directly support a catalyst on a ceramic support without disposing a coating layer on the ceramic support. In the invention, a catalyst solution containing a catalyst component consisting of a negative complex ion resulting from a catalyst precursor is prepared, and a pH of the catalyst solution is adjusted in such a manner as to satisfy the relation E1>E2 and E1>0 where E1 is a surface potential of a matrix phase consisting of a cordierite-W composite body relative to the pH of the catalyst solution and E2 is a surface potential of a dispersed phase consisting of compounds other than the cordierite-W composite body. After the ceramic support is brought into contact with the catalyst solution to support the catalyst component, heat-treatment is conducted to bond the matrix phase consisting of the cordierite-W composite body and the catalyst component to support the catalyst on the ceramic support.Type: GrantFiled: March 8, 2004Date of Patent: August 1, 2006Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kazuhiko Koike, Masakazu Tanaka, Takumi Suzawa, Tomomi Hase, Tomohiko Nakanishi
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Patent number: 7067452Abstract: (i) In a ceramic catalyst body which comprises a ceramic carrier which has a multitude of pores capable of supporting a catalyst directly on the surface of a substrate ceramic and a catalyst supported on the ceramic carrier, a layer containing an anti-evaporation metal such as Rh is formed on the outer surface of catalyst metal particles such as Pt or Rh. The layer containing the anti-evaporation metal protects the catalyst metal and prevents evaporation thereof, thereby suppressing the deterioration; and/or (ii) A ceramic catalyst body is made by having a main catalyst component and a promoter component directly on a ceramic carrier which can directly support the catalyst by substituting a part of the constituent elements of cordierite, and a trap layer is provided in the upstream thereof for trapping sulfur which is a catalyst poisoning component included in the exhaust gas.Type: GrantFiled: September 24, 2001Date of Patent: June 27, 2006Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Masakazu Tanaka, Tosiharu Kondo, Tomohiko Nakanishi, Kazuhiko Koike, Takashi Kondo, Tomomi Hase, Miho Ito
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Patent number: 6858563Abstract: This invention aims at achieving early activation by use of a catalytic body having a low thermal capacity, and a low pressure loss, without using a coating layer to reduce exhaust emission. The invention is directed also to improve exhaust purification performance by improving the combination of catalytic bodies and performance of each catalytic body. In the invention, a start catalyst 1 is arranged at an upstream portion of an exhaust pipe P of a car engine E and a three way catalyst 2 is disposed on the downstream side. The start catalyst 1 can directly support catalytic components through chemical bonds by incorporating replacing elements into a substrate ceramic having high heat resistance such as cordierite. Because a coating layer is not necessary, the catalyst of the invention has a low heat capacity and a large open area and achieves reduction of exhaust emission, and reduction of a pressure loss, through early activation.Type: GrantFiled: October 28, 2002Date of Patent: February 22, 2005Assignee: Denso CorporationInventors: Takumi Suzawa, Masakazu Tanaka, Kazuhiko Koike, Miho Ito
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Publication number: 20050003958Abstract: This invention is directed to providing a high-performance ceramic support being capable of realizing early activation of a catalyst due to direct loading while maintaining the excellent properties of the substrate ceramic, and being less susceptible to heat deterioration, by specifying the kind and combination of optimal replacing elements and the replacing amount and the like. A ceramic support comprising a substrate ceramic containing Mg, Al, Si and O as constituent elements are solid-dissolved therein Ti and W as the second component. The proportion of cordierite crystal having solid-dissolved therein W and Ti is 25 mol % or more, whereby a high-performance directly supporting ceramic support is realized.Type: ApplicationFiled: June 28, 2004Publication date: January 6, 2005Applicants: NIPPON SOKEN, INC., DENSO CORPORATIONInventors: Tomohiko Nakanishi, Kazuhiko Koike, Tomomi Hase