Patents by Inventor Kota Yokoyama
Kota Yokoyama 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: 20240138812Abstract: An ultrasonic wave generation device including: an ultrasonic wave generation source; an ultrasonic wave condensation part; and a waveguide. The ultrasonic wave condensation part has a first reflection surface opposed to the ultrasonic wave generation source and a second reflection surface opposed to the first reflection surface. The first reflection surface reflects the ultrasonic wave, generated from the ultrasonic wave generation source, toward the second reflection surface. The second reflection surface reflects the ultrasonic wave, which has been reflected by the first reflection surface, toward the waveguide so as to introduce the ultrasonic wave into the waveguide. The waveguide protrudes from the first reflection surface to a side opposite the second reflection surface. A recessed portion is formed from the first reflection surface to the second reflection surface side along an outer circumferential surface of the waveguide.Type: ApplicationFiled: October 26, 2023Publication date: May 2, 2024Applicants: Niterra Co., Ltd., THE UNIVERSITY OF TOKYOInventors: Satoshi SUZUKI, Kota YOKOYAMA, Ryo SUZUKI, Shinsuke ITOH, Takashi KASASHIMA, Takeshi MORITA, Shoki IEIRI
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Publication number: 20240119965Abstract: A recording medium includes a recording layer. The recording layer includes an aliphatic polymer, and a multiphoton absorption compound containing at least one bond selected from the group consisting of a carbon-carbon double bond, a carbon-nitrogen double bond, and a carbon-carbon triple bond, and having a multiphoton absorption characteristic. When the thickness of the recording layer is 100 ?m, the transmittance of the recording layer in the thickness direction with respect to light having a wavelength of 405 nm is greater than or equal to 80%.Type: ApplicationFiled: November 10, 2023Publication date: April 11, 2024Inventors: KOTA ANDO, MASAKO YOKOYAMA, NAOYA SAKATA, KENJI TAGASHIRA, HIDEKAZU ARASE
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Publication number: 20240069408Abstract: A light absorption material includes a compound represented by the following formula (1) as a main component: In the formula (1), R1 to R14 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I, and Br, and n is an integer greater than or equal to 2.Type: ApplicationFiled: October 24, 2023Publication date: February 29, 2024Inventors: SHINJI ANDO, MASAKO YOKOYAMA, KOTA ANDO
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Patent number: 10710019Abstract: A pressure swing adsorption gas production device that enables performing a desorption process in adsorption towers is provided. The device includes an off gas discharge route connected to the adsorption towers, a membrane separation unit with a separation membrane allowing miscellaneous gas in the off gas discharge route to pass faster than purification target gas, an off gas tank, and a pressure boosting unit that raises the pressure of and supplies the off gas to the membrane separation unit. The off gas tank and the pressure boosting unit are upstream of the membrane separation unit. The device includes a recycle gas return route via which some recycle gas is returned to the source gas supply route.Type: GrantFiled: March 13, 2017Date of Patent: July 14, 2020Assignee: Osaka Gas Co., Ltd.Inventors: Hiroshi Tanaka, Kota Yokoyama
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Publication number: 20190126187Abstract: A pressure swing adsorption gas production device that enables performing a desorption process in adsorption towers is provided. The device includes an off gas discharge route connected to the adsorption towers, a membrane separation unit with a separation membrane allowing miscellaneous gas in the off gas discharge route to pass faster than purification target gas, an off gas tank, and a pressure boosting unit that raises the pressure of and supplies the off gas to the membrane separation unit. The off gas tank and the pressure boosting unit are upstream of the membrane separation unit. The device includes a recycle gas return route via which some recycle gas is returned to the source gas supply route.Type: ApplicationFiled: March 13, 2017Publication date: May 2, 2019Inventors: Hiroshi Tanaka, Kota Yokoyama
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Patent number: 10277012Abstract: A spark plug having a connection portion disposed between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor which is a wire helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member which is in contact with the magnetic substance, the conductor, and an inner peripheral surface of the insulator, is disposed between the magnetic substance and the conductor, and the inner peripheral surface of the insulator, and has lower electrical conductivity than the conductor. The conductor is made of one or more of an oxide conductor, carbon, and a carbon compound.Type: GrantFiled: August 21, 2018Date of Patent: April 30, 2019Assignee: NGK SPARK PLUG CO., LTD.Inventors: Kazuhiro Kurosawa, Katsuya Takaoka, Kota Yokoyama, Kuniharu Tanaka, Hirokazu Kurono, Hironori Uegaki
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Patent number: 10270228Abstract: A spark plug having a connection portion disposed in the axial hole and between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member disposed between the magnetic substance and the conductor, and an inner peripheral surface of the insulator and having lower electrical conductivity than the conductor. The conductor includes a base and a conductive layer disposed on an outer periphery of the base and having higher electrical conductivity than the base, and the conductive layer has a thickness of larger than 0.1 ?m and equal to or smaller than 25 ?m.Type: GrantFiled: August 21, 2018Date of Patent: April 23, 2019Assignee: NGK SPARK PLUG CO., LTD.Inventors: Kazuhiro Kurosawa, Katsuya Takaoka, Kota Yokoyama, Kuniharu Tanaka, Hirokazu Kurono, Hironori Uegaki
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Publication number: 20190067914Abstract: A spark plug having a connection portion disposed between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor which is a wire helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member which is in contact with the magnetic substance, the conductor, and an inner peripheral surface of the insulator, is disposed between the magnetic substance and the conductor, and the inner peripheral surface of the insulator, and has lower electrical conductivity than the conductor. The conductor is made of one or more of an oxide conductor, carbon, and a carbon compound.Type: ApplicationFiled: August 21, 2018Publication date: February 28, 2019Applicant: NGK SPARK PLUG CO., LTD.Inventors: Kazuhiro KUROSAWA, Katsuya TAKAOKA, Kota YOKOYAMA, Kuniharu TANAKA, Hirokazu KURONO, Hironori UEGAKI
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Publication number: 20190067915Abstract: A spark plug having a connection portion disposed in the axial hole and between a metal terminal and a center electrode. The connection portion includes: a magnetic substance formed from a Fe-containing oxide; a conductor helically disposed on an outer periphery of the magnetic substance and electrically connected to the metal terminal and the center electrode; and an intermediate member disposed between the magnetic substance and the conductor, and an inner peripheral surface of the insulator and having lower electrical conductivity than the conductor. The conductor includes a base and a conductive layer disposed on an outer periphery of the base and having higher electrical conductivity than the base, and the conductive layer has a thickness of larger than 0.1 ?m and equal to or smaller than 25 ?m.Type: ApplicationFiled: August 21, 2018Publication date: February 28, 2019Applicant: NGK SPARK PLUG CO., LTD.Inventors: Kazuhiro KUROSAWA, Katsuya TAKAOKA, Kota YOKOYAMA, Kuniharu TANAKA, Hirokazu KURONO, Hironori UEGAKI
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Patent number: 9162888Abstract: The present invention relates to a reformed gas production apparatus that includes a reaction chamber containing a reforming catalyst, a supply route to the reaction chamber, a reformed gas conduction route from the reaction chamber, and a reaction chamber temperature control means that controls a temperature of the reaction chamber. The supply route supplies a fluid that includes a fuel containing a hydrocarbon having at least two carbon atoms, at least one of steam and a carbon dioxide-containing gas, and an oxygen-containing gas. The fuel can be a mixed fuel that includes a plurality of types of hydrocarbons that each have at least two carbon atoms. The reaction chamber temperature control means relates to the thermal decomposition index temperature of the fuel, which defines an upper limit temperature of the reforming reaction region.Type: GrantFiled: April 18, 2012Date of Patent: October 20, 2015Assignee: Osaka Gas Co., Ltd.Inventors: Osamu Okada, Kota Yokoyama, Naoki Inoue
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Patent number: 8945422Abstract: A catalytic reactor including: a reaction container filled with a catalyst having ruthenium; and an introduction part for introducing a material fluid to the reaction container. The reaction container is supplied with a mixed gas as material fluid to produce synthetic gas containing hydrogen and carbon monoxide in the presence of the catalyst. The introduction part is connected to the reaction container in a horizontal direction or a direction inclined downward from above a horizontal plane, and a height of the catalyst filled in the reaction container is adjusted above a height at which the material fluid is fed from the introduction part to the reaction container. Also, a method of using the catalytic reactor including monitoring a molar ratio of carbon and oxygen contained in the material fluid and stopping the supply of an oxygen-containing gas to the reaction container before the molar ratio becomes excessively low.Type: GrantFiled: June 11, 2009Date of Patent: February 3, 2015Assignee: Osaka Gas Co., Ltd.Inventors: Kota Yokoyama, Naoki Inoue, Koichiro Ikeda, Fuyuki Noguchi
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Patent number: 8679205Abstract: There is provided a technique and an apparatus for manufacturing a hydrogen-containing gas. An oxygen-containing gas is mixed with a feed gas obtained by mixing steam with a hydrocarbon fuel, this mixture is introduced into a catalytic reaction chamber, and a partial oxidation reaction and a steam reforming reaction are conducted to obtain a hydrogen-containing gas. In this reforming, an antechamber of the catalytic reaction chamber is heated up to a self-ignition temperature in a first catalyst section, where the self-ignition temperature is the temperature at which a mixed gas self-ignites during the advection period required for the mixed gas to move from a mixing chamber to the catalytic reaction chamber, with this temperature being at least a minimum partial-oxidation temperature and lower than a minimum steam reforming temperature.Type: GrantFiled: October 16, 2012Date of Patent: March 25, 2014Assignee: Osaka Gas Co., Ltd.Inventors: Fuyuki Nogushi, Naoki Inoue, Kota Yokoyama
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Patent number: 8486167Abstract: The invention provides a method for operating a reformed gas production apparatus with which it is possible to achieve a high reforming efficiency while preventing a drop in catalyst activity due to the deposition of carbon. The reformed gas production method uses a reforming catalyst to reform a fuel that contains a hydrocarbon having at least two carbon atoms to produce a reformed gas that includes methane, hydrogen, and carbon monoxide. With this method, a fluid that includes the fuel, at least one of steam and a carbon dioxide-containing gas, and an oxygen-containing gas, is supplied to a reforming reaction region, and with the thermal decomposition index temperature of the fuel, which is determined by the type and the concentration of the hydrocarbons having at least two carbon atoms that make up the fuel, serving as an upper limit temperature of the reforming reaction region, the fluid is brought into contact with the reforming catalyst to produce the reformed gas.Type: GrantFiled: June 28, 2005Date of Patent: July 16, 2013Assignee: Osaka Gas Co., Ltd.Inventors: Osamu Okada, Kota Yokoyama, Naoki Inoue
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Patent number: 8361433Abstract: There is provided a technique for manufacturing a hydrogen-containing gas. An oxygen-containing gas is mixed with a feed gas obtained by mixing steam with a hydrocarbon fuel, this mixture is introduced into a catalytic reaction chamber, and a partial oxidation reaction and a steam reforming reaction are conducted to obtain a hydrogen-containing gas. In this reforming, an antechamber of the catalytic reaction chamber is heated up to a self-ignition temperature in a first catalyst section, where the self-ignition temperature is the temperature at which a mixed gas self-ignites during the advection period required for the mixed gas to move from a mixing chamber to the catalytic reaction chamber, with this temperature being at least a minimum partial-oxidation temperature and lower than a minimum steam reforming temperature.Type: GrantFiled: June 13, 2006Date of Patent: January 29, 2013Assignee: Osaka Gas Co., Ltd.Inventors: Fuyuki Noguchi, Naoki Inoue, Kota Yokoyama
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Publication number: 20120224997Abstract: The present invention relates to a reformed gas production apparatus that includes a reaction chamber containing a reforming catalyst, a supply route to the reaction chamber, a reformed gas conduction route from the reaction chamber, and a reaction chamber temperature control means that controls a temperature of the reaction chamber. The supply route supplies a fluid that includes a fuel containing a hydrocarbon having at least two carbon atoms, at least one of steam and a carbon dioxide-containing gas, and an oxygen-containing gas. The fuel can be a mixed fuel that includes a plurality of types of hydrocarbons that each have at least two carbon atoms. The reaction chamber temperature control means relates to the thermal decomposition index temperature of the fuel, which defines an upper limit temperature of the reforming reaction region.Type: ApplicationFiled: April 18, 2012Publication date: September 6, 2012Applicant: OSAKA GAS CO., LTD.Inventors: Osamu Okada, Kota Yokoyama, Naoki Inoue
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Publication number: 20110147667Abstract: A catalytic reactor including: a reaction container filled with a catalyst having ruthenium; and an introduction part for introducing a material fluid to the reaction container. The reaction container is supplied with a mixed gas as material fluid to produce synthetic gas containing hydrogen and carbon monoxide in the presence of the catalyst. The introduction part is connected to the reaction container in a horizontal direction or a direction inclined downward from above a horizontal plane, and a height of the catalyst filled in the reaction container is adjusted above a height at which the material fluid is fed from the introduction part to the reaction container. Also, a method of using the catalytic reactor including monitoring a molar ratio of carbon and oxygen contained in the material fluid and stopping the supply of an oxygen-containing gas to the reaction container before the molar ratio becomes excessively low.Type: ApplicationFiled: June 11, 2009Publication date: June 23, 2011Applicants: OSAKA GAS CO., LTD., JGC CORPORATIONInventors: Kota Yokoyama, Naoki Inoue, Koichiro Ikeda, Fuyuki Noguchi
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Publication number: 20090212259Abstract: There is provided a technique for manufacturing a hydrogen-containing gas. An oxygen-containing gas is mixed with a feed gas obtained by mixing steam with a hydrocarbon fuel, this mixture is introduced into a catalytic reaction chamber, and a partial oxidation reaction and a steam reforming reaction are conducted to obtain a hydrogen-containing gas. In this reforming, an antechamber of the catalytic reaction chamber is heated up to a self-ignition temperature in a first catalyst section, where the self-ignition temperature is the temperature at which a mixed gas self-ignites during the advection period required for the mixed gas to move from a mixing chamber to the catalytic reaction chamber, with this temperature being at least a minimum partial-oxidation temperature and lower than a minimum steam reforming temperature.Type: ApplicationFiled: June 13, 2006Publication date: August 27, 2009Applicant: OSAKA GAS CP., LTD.Inventors: Fuyuki Noguchi, Naoki Inoue, Kota Yokoyama
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Publication number: 20080263953Abstract: The invention provides a method for operating a reformed gas production apparatus with which it is possible to achieve a high reforming efficiency while preventing a drop in catalyst activity due to the deposition of carbon. The reformed gas production method uses a reforming catalyst to reform a fuel that contains a hydrocarbon having at least two carbon atoms to produce a reformed gas that includes methane, hydrogen, and carbon monoxide. With this method, a fluid that includes the fuel, at least one of steam and a carbon dioxide-containing gas, and an oxygen-containing gas, is supplied to a reforming reaction region, and with the thermal decomposition index temperature of the fuel, which is determined by the type and the concentration of the hydrocarbons having at least two carbon atoms that make up the fuel, serving as an upper limit temperature of the reforming reaction region, the fluid is brought into contact with the reforming catalyst to produce the reformed gas.Type: ApplicationFiled: June 28, 2005Publication date: October 30, 2008Applicant: OSAKA GAS CO., LTD.Inventors: Osamu Okada, Kota Yokoyama, Naoki Inoue