Patents by Inventor Yusuke Kita
Yusuke Kita 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: 20230107592Abstract: In order to enable a reductive amination reaction at a low temperature and a low hydrogen pressure, provided is a catalyst comprising cobalt supported on an oxide, the catalyst produced by a method comprising the following steps (1) to (4): (1) a step of mixing a salt containing a cobalt ion and an oxide in water, (2) a step of distilling water away from a mixed solution obtained in step (1) and drying a resulting solid material, (3) a step of calcining a dried material obtained in step (2) in a nitrogen stream, and (4) a step of reducing a calcined product obtained in step (3) in a hydrogen stream.Type: ApplicationFiled: March 1, 2021Publication date: April 6, 2023Applicant: TOKYO INSTITUTE OF TECHNOLOGYInventors: Michikazu HARA, Keigo KAMATA, Yusuke KITA, Dian DENG
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Patent number: 11383753Abstract: A traveling vehicle includes a steering shaft to which a steering handle is attached, the steering shaft being adjustable in tilt angle and length, a tilt lock to lock the steering shaft at an adjusted tilt angle, a telescopic lock to lock the steering shaft at an adjusted length, and an operator including an operation area to allow locking of both of the tilt lock and the telescopic lock to be released.Type: GrantFiled: December 23, 2020Date of Patent: July 12, 2022Assignee: KUBOTA CORPORATIONInventor: Yusuke Kita
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Publication number: 20210164064Abstract: [Objective] To provide a mannose extraction method with which high-purity mannose can be extremely easily extracted by performing a two-stage hydrolysis treatment on a plant-based raw material. [Solving Means] Mannose is extracted from a plant-based raw material by carrying out a first hydrolysis step S1 in which a plant-based raw material M1 and a first acid catalyst A1 are mixed and heated, a separation step S2 in which a reaction product M2 obtained by the first hydrolysis step is separated and recovered, and a second hydrolysis step S3 in which the reaction product obtained by the separation step and a second acid catalyst A2 are mixed and heated.Type: ApplicationFiled: April 26, 2019Publication date: June 3, 2021Inventors: Michikazu Hara, Yusuke Kita, Ryohei Haige, Hirohumi Yamada
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Publication number: 20210107554Abstract: A traveling vehicle includes a steering shaft to which a steering handle is attached, the steering shaft being adjustable in tilt angle and length, a tilt lock to lock the steering shaft at an adjusted tilt angle, a telescopic lock to lock the steering shaft at an adjusted length, and an operator including an operation area to allow locking of both of the tilt lock and the telescopic lock to be released.Type: ApplicationFiled: December 23, 2020Publication date: April 15, 2021Inventor: Yusuke KITA
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Patent number: 10544084Abstract: An object of the present invention is to provide a method for producing high-purity 2,6-NDA having a small alkali metal content. The present invention relates to a method for producing a high-purity 2,6-naphthalene dicarboxylic acid, comprising a purification step of washing a crude 2,6-naphthalene dicarboxylic acid having a specific surface area of 2 m2/g or more in the presence of an aqueous medium under a temperature condition of 90° C. or more and less than 200° C.Type: GrantFiled: October 30, 2018Date of Patent: January 28, 2020Assignee: UENO FINE CHEMICALS INDUSTRY, LTD.Inventors: Takaya Hisano, Masaki Hamaguchi, Yusuke Kita, Ryota Motooka, Chiaki Terao
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Publication number: 20190127310Abstract: An object of the present invention is to provide a method for producing high-purity 2,6-NDA having a small alkali metal content. The present invention relates to a method for producing a high-purity 2,6-naphthalene dicarboxylic acid, comprising a purification step of washing a crude 2,6-naphthalene dicarboxylic acid having a specific surface area of 2 m2/g or more in the presence of an aqueous medium under a temperature condition of 90° C. or more and less than 200° C.Type: ApplicationFiled: October 30, 2018Publication date: May 2, 2019Applicant: UENO FINE CHEMICALS INDUSTRY, LTD.Inventors: Takaya HISANO, Masaki HAMAGUCHI, Yusuke KITA, Ryota MOTOOKA, Chiaki TERAO
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Patent number: 9790165Abstract: The present invention relates to a production process of a 4-hydroxy-benzoic acid long chain ester, that includes a step of reacting a 4-hydroxy-benzoic acid short chain ester with an aliphatic alcohol in the presence of a metal catalyst. The present invention also relates to a purification process of a 4-hydroxy-benzoic acid long chain ester, that includes a step of adding an acid aqueous solution to a crude composition including the 4-hydroxy-benzoic acid long chain ester, separating the crude composition to an organic phase and a water phase and extracting the organic phase.Type: GrantFiled: April 15, 2016Date of Patent: October 17, 2017Assignee: UENO FINE CHEMICALS INDUSTRY, LTD.Inventors: Yusuke Kita, Toshihide Komatsu, Takaya Hisano, Kuniyo Yanagawase, Mio Tsuchiya
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Publication number: 20160318841Abstract: The present invention relates to a production process of a 4-hydroxy-benzoic acid long chain ester, that includes a step of reacting a 4-hydroxy-benzoic acid short chain ester with an aliphatic alcohol in the presence of a metal catalyst. The present invention also relates to a purification process of a 4-hydroxy-benzoic acid long chain ester, that includes a step of adding an acid aqueous solution to a crude composition including the 4-hydroxy-benzoic acid long chain ester, separating the crude composition to an organic phase and a water phase and extracting the organic phase.Type: ApplicationFiled: April 15, 2016Publication date: November 3, 2016Applicant: UENO FINE CHEMICALS INDUSTRY, LTD.Inventors: Yusuke KITA, Toshihide KOMATSU, Takaya HISANO, Kuniyo YANAGAWASE, Mio TSUCHIYA
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Patent number: 9012649Abstract: Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1): wherein R1, R2, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2): wherein R1, R2, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3): IrH(Z)(Q)(PP*)??(3), wherein Z, PP*, and Q are as described in Description, or the following general formula (4): [{IrH(PP*)}2(?-Z)3]Z??(4), wherein Z and PP* are as described in Description.Type: GrantFiled: January 30, 2014Date of Patent: April 21, 2015Assignee: Takasago International CorporationInventors: Kazushi Mashima, Yusuke Kita, Takuto Nagano, Atsuhiro Iimuro, Kenta Yamaji, Shoji Hida, Kiyoto Hori, Hideki Nara
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Publication number: 20140213792Abstract: Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1): wherein R1, R2, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2): wherein R1, R2, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3): IrH(Z)(Q)(PP*)??(3), wherein Z, PP*, and Q are as described in Description, or the following general formula (4): [{IrH(PP*)}2(?-Z)3]Z??(4), wherein Z and PP* are as described in Description.Type: ApplicationFiled: January 30, 2014Publication date: July 31, 2014Applicant: TAKASAGO INTERNATIONAL CORPORATIONInventors: Kazushi MASHIMA, Yusuke KITA, Takuto NAGANO, Atsuhiro IIMURO, Kenta YAMAJI, Shoji HIDA, Kiyoto HORI, Hideki NARA
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Patent number: 8680325Abstract: The present invention provides a process for preparing 2,5-dihydroxyterephthalic acid which comprises reacting a dialkali metal salt of hydroquinone with carbon dioxide in a reaction medium in the presence of a potassium salt represented by formula (I): CnH2n+1COOK??(I) wherein n is an integer of 1-17. According to the process for preparing 2,5-dihydroxyterephthalic acid of the present invention, 2,5-dihydroxyterephthalic acid can be produced both safely and at a low cost under industrially advantageous conditions. Further, the process according to the present invention causes less damage to reaction equipment and the like.Type: GrantFiled: May 29, 2012Date of Patent: March 25, 2014Assignee: Ueno Fine Chemicals Industry, Ltd.Inventors: Yusuke Kita, Ryoichi Otsuka
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Publication number: 20120310008Abstract: The present invention provides a process for preparing 2,5-dihydroxyterephthalic acid which comprises reacting a dialkali metal salt of hydroquinone with carbon dioxide in a reaction medium in the presence of a potassium salt represented by formula (I): CnH2n+1COOK??(I) wherein n is an integer of 1-17. According to the process for preparing 2,5-dihydroxyterephthalic acid of the present invention, 2,5-dihydroxyterephthalic acid can be produced both safely and at a low cost under industrially advantageous conditions. Further, the process according to the present invention causes less damage to reaction equipment and the like.Type: ApplicationFiled: May 29, 2012Publication date: December 6, 2012Applicant: UENO FINE CHEMICALS INDUSTRY, LTD.Inventors: Yusuke KITA, Ryoichi OTSUKA
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Patent number: 7648346Abstract: A variable displacement compressor in which variable control of displacement is effected through adjustment of a crank chamber pressure, includes: a suction port; a suction chamber; a suction passage establishing communication between the suction port and the suction chamber; and an opening control valve arranged in the suction passage and adapted to adjust the opening of the suction passage based on a pressure difference between a suction pressure in the suction port and the crank chamber pressure.Type: GrantFiled: April 18, 2005Date of Patent: January 19, 2010Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Tomohiro Murakami, Sokichi Hibino, Shiro Hayashi, Yoshio Kimoto, Yusuke Kita, Hiroaki Kayukawa
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Publication number: 20050244279Abstract: A variable displacement compressor in which variable control of displacement is effected through adjustment of a crank chamber pressure, includes: a suction port; a suction chamber; a suction passage establishing communication between the suction port and the suction chamber; and an opening control valve arranged in the suction passage and adapted to adjust the opening of the suction passage based on a pressure difference between a suction pressure in the suction port and the crank chamber pressure.Type: ApplicationFiled: April 18, 2005Publication date: November 3, 2005Inventors: Tomohiro Murakami, Sokichi Hibino, Shiro Hayashi, Yoshio Kimoto, Yusuke Kita, Hiroaki Kayukawa
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Publication number: 20050244278Abstract: In a piston-type variable displacement compressor according to the present invention, a rotary valve includes a guide passage having a main suction port for securing a flow rate corresponding to maximum displacement operation and a sub suction port for effecting throttling to a flow rate low enough to suppress pressure fluctuation during variable displacement operation, and during maximum displacement operation, the spool is moved by a suction gas flow to totally open both the main suction port and the sub suction port, and during variable displacement operation, the spool is moved by a pressure difference between the suction chamber pressure and the crank chamber pressure to close the main suction port while keeping the sub suction port open.Type: ApplicationFiled: April 15, 2005Publication date: November 3, 2005Inventors: Shiro Hayashi, Sokichi Hibino, Yusuke Kita, Tomoharu Tashiro