Patents by Inventor Toru Wakihara
Toru Wakihara 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: 20240058801Abstract: Provided is a method for producing a beta zeolite, the method including bringing a beta zeolite parent powder synthesized without using an organic structure-directing agent into contact with an alkaline aqueous solution having a pH of 12 or higher. The liquid temperature of the alkaline aqueous solution is preferably se to 40° C. or above and 100° C. or below. The ratio of the parent powder to the alkaline aqueous solution is preferably set to 10 g/L or greater and 1000 g/L or less. The contact time is preferably 0.5 hours or longer and 48 hours or shorter. The SiO2/Al2O3 molar ratio is preferably s16 or less.Type: ApplicationFiled: January 24, 2022Publication date: February 22, 2024Inventors: Tatsuya OKUBO, Toru WAKIHARA, Kenta IYOKI, Junki TOMITA, Katsuhiko HAYASHI, Akihiro KANNO
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Patent number: 11642552Abstract: The present invention aims to provide a warming composition showing a favorable dispersion stability after long-term storage, a high warming impact, and improvement of zeolite-specific deterioration of feeling of use, and to provide an aerosol formulation containing the warming composition. This object is achieved with a warming composition containing zeolite nanoparticles having an average particle size of not more than 500 nm, wherein the temperature of the composition is rapidly increased by heat generated by hydration reaction between the zeolite and water.Type: GrantFiled: September 13, 2019Date of Patent: May 9, 2023Assignees: Toyo Aerosol Industry Co., Ltd., The University of TokyoInventors: Hokuto Kamijyo, Yasutomo Nakajima, Toru Wakihara, Yasuo Yonezawa
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Publication number: 20220097033Abstract: The present disclosure relates to a process for the preparation of a zeolitic material having a CHA-type framework structure comprising YO2 and X2O3, wherein the process comprises: (1) providing a mixture comprising one or more sources for YO2, one or more sources for X2O3, one or more tetraalkylammonium cation R1R2R3R4N+-containing compounds, and one or more tetraalkylammonium cation R5R6R7R8N+-containing compounds as structure directing agent; (2) crystallizing the mixture to obtain a zeolitic material having a CHA-type framework structure; wherein Y is a tetravalent element and X is a trivalent element, wherein R1, R2, R3, R5, R6, and R7 independently from one another stand for alkyl, wherein R4 stands for CnH2nOH with n=1 to 6, and wherein R8 stands for cycloalkyl.Type: ApplicationFiled: December 18, 2019Publication date: March 31, 2022Inventors: Hannah SCHREYER, Andrei-Nicolae Parvulescu, Ulrich MUELLER, Karsten SEIDEL, Tatsuya OKUBO, Toru WAKIHARA, Kenta IYOKI, Watcharop CHAIKITTISILP
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Publication number: 20220073360Abstract: Provided are a zeolite with increased hydrothermal durability and a method of manufacturing the same. One aspect of the present invention provides a method of producing the zeolite, comprising the steps of: preparing a raw material zeolite (excluding FAU-type zeolite material) containing at least Si but not Al in the framework or having a Si/Al atomic ratio of 50 or more, and bringing the zeolite material into contact with a solution containing fluoride ions or with hot water at a temperature of 50° C. or more and 250° C. or less.Type: ApplicationFiled: November 27, 2019Publication date: March 10, 2022Inventors: Toru Wakihara, Kenta Iyoki, Takako Onishi, Kakeru Kikumasa
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Publication number: 20200009066Abstract: The present invention aims to provide a warming composition showing a favorable dispersion stability after long-term storage, a high warming impact, and improvement of zeolite-specific deterioration of feeling of use, and to provide an aerosol formulation containing the warming composition. This object is achieved with a warming composition containing zeolite nanoparticles having an average particle size of not more than 500 nm, wherein the temperature of the composition is rapidly increased by heat generated by hydration reaction between the zeolite and water.Type: ApplicationFiled: September 13, 2019Publication date: January 9, 2020Inventors: Hokuto Kamijyo, Yasutomo Nakajima, Toru Wakihara, Yasuo Yonezawa
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Patent number: 10308516Abstract: Provided is a method for continuous production of zeolite in which a starting material is continuously supplied to a tubular reactor to produce an aluminophosphate zeolite that contains, in the framework structure, at least aluminum atoms and phosphorus atoms or an aluminosilicate zeolite having 5?SiO2/Al2O3?2000. The tubular reactor is heated using a heat medium; a ratio (volume)/(lateral surface area) of the volume (inner capacity) to the lateral surface area of the tubular reactor is 0.75 cm or smaller; and seed crystals are added to the starting material. Through using a small-diameter tubular reactor and heating with a heat medium, it becomes possible to heat sufficiently the entirety of a starting material (zeolite precursor gel) in a short time, and to allow reaction to proceed at a high rate. The occurrence of irregular pressure fluctuations during continuous production of the zeolite can be prevented by adding seed crystals.Type: GrantFiled: January 7, 2016Date of Patent: June 4, 2019Assignees: MITSUBISHI CHEMICAL CORPORATION, THE UNIVERSITY OF TOKYOInventors: Tatsuya Okubo, Toru Wakihara, Zhendong Liu, Takahiko Takewaki, Kazunori Oshima, Daisuke Nishioka
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Publication number: 20160115039Abstract: Provided is a method for continuous production of zeolite in which a starting material is continuously supplied to a tubular reactor to produce an aluminophosphate zeolite that contains, in the framework structure, at least aluminum atoms and phosphorus atoms or an aluminosilicate zeolite having 5?SiO2/Al2O3?2000. The tubular reactor is heated using a heat medium; a ratio (volume)/(lateral surface area) of the volume (inner capacity) to the lateral surface area of the tubular reactor is 0.75 cm or smaller; and seed crystals are added to the starting material. Through using a small-diameter tubular reactor and heating with a heat medium, it becomes possible to heat sufficiently the entirety of a starting material (zeolite precursor gel) in a short time, and to allow reaction to proceed at a high rate. The occurrence of irregular pressure fluctuations during continuous production of the zeolite can be prevented by adding seed crystals.Type: ApplicationFiled: January 7, 2016Publication date: April 28, 2016Applicants: MITSUBISHI CHEMICAL CORPORATION, THE UNIVERSITY OF TOKYOInventors: Tatsuya Okubo, Toru Wakihara, Zhendong Liu, Takahiko Takewaki, Kazunori Oshima, Daisuke Nishioka
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Patent number: 8491817Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: GrantFiled: November 12, 2010Date of Patent: July 23, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
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Patent number: 8482192Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: GrantFiled: November 12, 2010Date of Patent: July 9, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
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Patent number: 8475680Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: GrantFiled: September 10, 2008Date of Patent: July 2, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
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Patent number: 8450923Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: GrantFiled: November 12, 2010Date of Patent: May 28, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Yumi Fukuda, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
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Patent number: 8105502Abstract: A luminescent material is provided, which includes a carbide oxynitride-based compound having a composition represented by formula 1: (M1?wRw)uAl1?xSi1+vOzNtCy??formula 1 wherein M is at least one metal element excluding Si and Al, and R is a luminescent central element. w, u, x, v, z, t and y satisfy following relationships: 0.001<w<0.5; 0.66?u?1; 0.07?x?0.73; 0.06?v?0.84; 0.04?z?0.44; 2.7?t?3.1; and 0.019?y?0.13.Type: GrantFiled: September 17, 2008Date of Patent: January 31, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Yumi Fukuda, Jun-ichi Tatami, Hironori Asai, Katsutoshi Komeya, Naotoshi Matsuda, Toru Wakihara, Keiko Albessard, Shoko Abe
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Publication number: 20110058583Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: ApplicationFiled: November 12, 2010Publication date: March 10, 2011Inventors: Yumi FUKUDA, Masaaki Tamanani, Katsuko Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara
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Publication number: 20110058582Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: ApplicationFiled: November 12, 2010Publication date: March 10, 2011Inventors: Yumi FUKUDA, Masaaki Tamatani, Katsuko Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara
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Publication number: 20110057149Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2 ??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: ApplicationFiled: November 12, 2010Publication date: March 10, 2011Inventors: Yumi FUKUDA, Masaaki Tamanani, Katsuko Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara
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Patent number: 7612006Abstract: To provide a sintered silicon nitride with conductivity and densification, an oxide of titanium group elements, such as titanium oxide, hafnium oxide, zirconium oxide and the like, aluminum oxide and/or aluminum nitride is added as needed to silicon nitride-oxidant of rare-earth elements-aluminum oxide system or silicon nitride-oxide of rare-earth elements-magnesia system, and then specified quantity of carbon nonotube (CNT) is added to the above mixture. CNT generates silicon carbide after the reaction with contiguous or proximal silicon nitride and the like depending on the sintering duration at high temperature. Since silicon carbide is generated along with nanotubes, the silicon carbide functions as conductor with excellent heat resistance, corrosion resistance and the like.Type: GrantFiled: September 27, 2005Date of Patent: November 3, 2009Assignee: Yokohama TLO Company, Ltd.Inventors: Katsutoshi Komeya, Junichi Tatami, Takeshi Meguro, Tomofumi Katashima, Toru Wakihara
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Publication number: 20090096361Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).Type: ApplicationFiled: September 10, 2008Publication date: April 16, 2009Inventors: Yumi Fukuda, Masaaki Tamatani, Hironori Asai, Ryosuke Hiramatsu, Junichi Tatami, Katsutoshi Komeya, Toru Wakihara, Katsuko Tamatani
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Publication number: 20090072195Abstract: A luminescent material is provided, which includes a carbide oxynitride-based compound having a composition represented by formula 1: (M1?wRw)uAl1?xSi1+vOzNtCy??formula 1 wherein M is at least one metal element excluding Si and Al, and R is a luminescent central element. w, u, x, v, z, t and y satisfy following relationships: 0.001<w<0.5; 0.66?u?1; 0.07?x?0.73; 0.06?v?0.84; 0.04?z?0.44; 2.7?t?3.1; and 0.019?y?0.13.Type: ApplicationFiled: September 17, 2008Publication date: March 19, 2009Inventors: Yumi FUKUDA, Jun-ichi Tatami, Hironori Asai, Katsutoshi Komeya, Naotoshi Matsuda, Toru Wakihara, Keiko Albessard, Shoko Abe
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Publication number: 20080076657Abstract: To provide a sintered silicon nitride with conductivity and densification, an oxide of titanium group elements, such as titanium oxide, hafnium oxide, zirconium oxide and the like, aluminum oxide and/or aluminum nitride is added as needed to silicon nitride-oxidant of rare-earth elements-aluminum oxide system or silicon nitride-oxide of rare-earth elements-magnesia system, and then specified quantity of carbon nonotube (CNT) is added to the above mixture. CNT generates silicon carbide after the reaction with contiguous or proximal silicon nitride and the like depending on the sintering duration at high temperature. Since silicon carbide is generated along with nanotubes, the silicon carbide functions as conductor with excellent heat resistance, corrosion resistance and the like.Type: ApplicationFiled: September 27, 2005Publication date: March 27, 2008Inventors: Katsutoshi Komeya, Junichi Tatami, Takeshi Meguro, Tomofumi Katashima, Toru Wakihara