Patents by Inventor Takahiro Kozuka
Takahiro Kozuka 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: 20240028956Abstract: According to an embodiment, an automated machine learning system includes a registration receiver, a verification dataset storage, a verifier, a feedback information generator, a first display controller, and an algorithm storage. The registration receiver is configured to receive registration of a machine learning algorithm. The verification dataset storage stores a verification dataset for use in operation verification on the machine learning algorithm. The verifier is configured to perform the operation verification by executing the machine learning algorithm using the verification dataset stored in the verification dataset storage. The feedback information generator is configured to generate feedback information on the bases of a result of the operation verification. The first display controller is configured to control display of the generated feedback information.Type: ApplicationFiled: March 2, 2023Publication date: January 25, 2024Applicants: Kabushiki Kaisha Toshiba, Toshiba Digital Solutions CorporationInventors: Takahiro KOZUKA, Toshiyuki KATOU, Ryo KIYAMA
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Publication number: 20230252107Abstract: According to an embodiment, a management device includes a data processor, a data manager, and an evaluator. The data processor is configured to perform at least one preprocessing operation of creating a training dataset. The data manager is configured to perform a process of saving the created training dataset. The evaluator is configured to evaluate a model created using the created training dataset. The data manager is configured to temporarily save the created training dataset, and determine whether or not to permanently save the created training dataset on the basis of an evaluation result of the model by the evaluator.Type: ApplicationFiled: August 29, 2022Publication date: August 10, 2023Applicant: Kabushiki Kaisha ToshibaInventors: Toshinari HAMAMOTO, Masataka YAMADA, Toshiyuki KATOU, Takahiro KOZUKA
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Patent number: 10294110Abstract: [Problem] To provide a novel production method for pentachlorodisilane and to obtain pentachlorodisilane having a purity of 90 mass % or more by carrying out this production method. [Solution] A production method provided with: a high-temperature reaction step in which a raw material gas containing vaporized tetrachlorosilane and hydrogen is reacted at a high temperature in order to obtain a reaction product gas containing trichlorosilane; a pentachlorodisilane generation step in which the reaction product gas obtained in the high-temperature reaction step is brought into contact with a cooling liquid obtained by circulative cooling of a condensate that is generated by cooling the reaction product gas, the reaction product gas is quickly cooled, and pentachlorodisilane is generated within the condensate; and a recovery step in which the generated pentachlorodisilane is recovered.Type: GrantFiled: September 25, 2015Date of Patent: May 21, 2019Assignees: DENKA COMPANY LIMTIED, L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDEInventors: Hiroyuki Yashima, Takahiro Kozuka, Seiichi Terasaki, Jean-Marc Girard
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Publication number: 20170283267Abstract: [Problem] To provide a novel production method for pentachlorodisilane and to obtain pentachlorodisilane having a purity of 90 mass % or more by carrying out this production method. [Solution] A production method provided with: a high-temperature reaction step in which a raw material gas containing vaporized tetrachlorosilane and hydrogen is reacted at a high temperature in order to obtain a reaction product gas containing trichlorosilane; a pentachlorodisilane generation step in which the reaction product gas obtained in the high-temperature reaction step is brought into contact with a cooling liquid obtained by circulative cooling of a condensate that is generated by cooling the reaction product gas, the reaction product gas is quickly cooled, and pentachlorodisilane is generated within the condensate; and a recovery step in which the generated pentachlorodisilane is recovered.Type: ApplicationFiled: September 25, 2015Publication date: October 5, 2017Applicants: Denka Company Limited, L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EX PLOITATION DES PROCEDES GEORGES CLAUDEInventors: Hiroyuki YASHIMA, Takahiro KOZUKA, Seiichi TERASAKI, Jean-Marc GIRARD
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Patent number: 9074031Abstract: Provided is a method of producing a polyvinyl alcohol resin, wherein the impurities in the resin are removed efficiently with a small amount of a washing liquid. A polyvinyl alcohol obtained after a polymerization step (step S1) and a saponification step (step S2) is washed with a washing liquid consisting of methyl acetate: 1 to 40 parts by mass, methanol: 50 to 98.9 parts by mass and water: 0.1 to 10 parts by mass in a washing step (step S3). The solid matter concentration of the slurry containing the washing liquid then is 1 to 30 mass %.Type: GrantFiled: November 12, 2010Date of Patent: July 7, 2015Assignee: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Satoshi Watanabe, Takahiro Kozuka
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Patent number: 9022362Abstract: Provided are an apparatus for removing residual monomers and a method of producing a polyvinyl alcohol resin that can prevent drift of the organic solvent gas and residual of the polymerization solution on the trays and permits efficient removal of the unreacted monomers from the polymerization solution. An apparatus 1 for removing residual monomers having a column main body and valve trays 2 having multiple gas blowout ports each having openings only in a direction perpendicular to the flow direction of the polymerization solution 4 or openings directed downward in the flow direction of the polymerization solution, which are installed in multiple stages in the column main body is used in a monomer-removing step of removing monomers in a polymerization solution 4 by bringing an organic solvent gas, such as methanol gas, into contact with a polymerization solution 4 obtained from a polymerization reactor 3.Type: GrantFiled: December 6, 2010Date of Patent: May 5, 2015Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventor: Takahiro Kozuka
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Patent number: 9023287Abstract: Provided is a method and an apparatus for producing a polyvinyl alcohol that can reduce energy consumption without deterioration in quality of the product polyvinyl alcohol. First, one or more vinyl esters are polymerized or a vinyl ester and other copolymerizable monomers are copolymerized to give a polyvinyl ester. Then, a raw saponification solution containing the polyvinyl ester and an organic solvent is fed through a channel 1 and a saponification catalyst-containing solution is introduced into the center of the channel. They are then mixed with static mixers 2 and the mixture 4 is subjected to saponification reaction, as it is placed on a belt 3.Type: GrantFiled: November 12, 2010Date of Patent: May 5, 2015Assignee: Denki Kagaku Kabushiki KaishaInventor: Takahiro Kozuka
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Patent number: 8816030Abstract: Provided are a chloroprene rubber, a chloroprene rubber composition and the vulcanizate and formed body thereof superior in low-temperature properties. A chloroprene rubber is obtained by emulsion polymerization of raw monomers containing antiperiplanar trans-1-chlorobuta-1,3-diene and cis-1-chlorobuta-1,3-diene in a total amount of 0.5 mass % or more, 2,3-dichlorobuta-1,3-diene in an amount of 2.0 mass % or more, and the rest being chloroprene. A composition containing the chloroprene is vulcanized into a formed body.Type: GrantFiled: February 7, 2012Date of Patent: August 26, 2014Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Uichiro Yamagishi, Takashi Tachiyama, Takahiro Kozuka
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Publication number: 20140058055Abstract: Provided are a chloroprene rubber, a chloroprene rubber composition and the vulcanizate and formed body thereof superior in low-temperature properties. A chloroprene rubber is obtained by emulsion polymerization of raw monomers containing antiperiplanar trans-1-chlorobuta-1,3-diene and cis-1-chlorobuta-1,3-diene in a total amount of 0.5 mass % or more, 2,3-dichlorobuta-1,3-diene in an amount of 2.0 mass % or more, and the rest being chloroprene. A composition containing the chloroprene is vulcanized into a formed body.Type: ApplicationFiled: February 7, 2012Publication date: February 27, 2014Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Uichiro Yamagishi, Takashi Tachiyama, Takahiro Kozuka
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Publication number: 20130005905Abstract: Provided are a method and an apparatus for producing a polyvinyl alcohol that can remove unreacted monomers from the polymerization solution efficiently and reduce the amount of methanol injected. A polymerization solution obtained by polymerization of one or more vinyl esters or copolymerization of a vinyl ester with other monomers copolymerizable therewith is adjusted to a particular concentration by addition of liquid methanol and then brought into contact with methanol vapor in counter-current flow for separation into a monomer-free polymer solution and a monomer/methanol mixture. The monomer-free polymer solution is then saponified in the presence of a catalyst to give a polyvinyl alcohol.Type: ApplicationFiled: December 6, 2010Publication date: January 3, 2013Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventor: Takahiro Kozuka
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Publication number: 20130005906Abstract: Provided are an apparatus for removing residual monomers and a method of producing a polyvinyl alcohol resin that can prevent drift of the organic solvent gas and residual of the polymerization solution on the trays and permits efficient removal of the unreacted monomers from the polymerization solution. An apparatus 1 for removing residual monomers having a column main body and valve trays 2 having multiple gas blowout ports each having openings only in a direction perpendicular to the flow direction of the polymerization solution 4 or openings directed downward in the flow direction of the polymerization solution, which are installed in multiple stages in the column main body is used in a monomer-removing step of removing monomers in a polymerization solution 4 by bringing an organic solvent gas, such as methanol gas, into contact with a polymerization solution 4 obtained from a polymerization reactor 3.Type: ApplicationFiled: December 6, 2010Publication date: January 3, 2013Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventor: Takahiro Kozuka
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Publication number: 20120329950Abstract: Provided is a method and an apparatus for producing a polyvinyl alcohol that can reduce energy consumption without deterioration in quality of the product polyvinyl alcohol. First, one or more vinyl esters are polymerized or a vinyl ester and other copolymerizable monomers are copolymerized to give a polyvinyl ester. Then, a raw saponification solution containing the polyvinyl ester and an organic solvent is fed through a channel 1 and a saponification catalyst-containing solution is introduced into the center of the channel. They are then mixed with static mixers 2 and the mixture 4 is subjected to saponification reaction, as it is placed on a belt 3.Type: ApplicationFiled: November 12, 2010Publication date: December 27, 2012Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventor: Takahiro Kozuka
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Publication number: 20120329949Abstract: Provided is a method of producing a polyvinyl alcohol resin, wherein the impurities in the resin are removed efficiently with a small amount of a washing liquid. A polyvinyl alcohol obtained after a polymerization step (step S1) and a saponification step (step S2) is washed with a washing liquid consisting of methyl acetate: 1 to 40 parts by mass, methanol: 50 to 98.9 parts by mass and water: 0.1 to 10 parts by mass in a washing step (step S3). The solid matter concentration of the slurry containing the washing liquid then is 1 to 30 mass %.Type: ApplicationFiled: October 12, 2010Publication date: December 27, 2012Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Satoshi Watanabe, Takahiro Kozuka
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Patent number: 5575986Abstract: A compound of the following formula ##STR1## wherein m is an integer of 1 to 3, R.sub.1 and R.sub.2 are the same or different and each is hydrogen atom or lower alkyl, and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are the same or different and each is hydroxy or a group of the formula ##STR2## (wherein n is 0 or 1, X is --NH-- or --O--, Y is alkylene, A is hydrogen atom, lower alkyl, lower alkoxy, halogen atom or trifluoromethyl, and B is alkyl or alkenyl), with the proviso that two or three of R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are hydroxyl groups and that when two of them are hydroxyl groups, the cases where R.sub.3 and R.sub.5 are hydroxy, and R.sub.4 and R.sub.6 are hydroxy are excluded; a complex compound comprising said compound and a metallic atom; and a diagnostic agent containing said complex compound. The above compound is useful as a chelating agent and the complex compound comprising said compound and a metallic atom exhibits superior characteristics as a contrast medium for image diagnosis.Type: GrantFiled: April 19, 1995Date of Patent: November 19, 1996Assignee: The Green Cross CorporationInventors: Fumio Mori, Tadashi Okano, Kazuki Murakami, Masakazu Shintome, Hiromichi Mukai, Ikuko Miyagi, Takashi Imagawa, Sang-Won Kim, Taro Marukawa, Takahiro Kozuka
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Patent number: 5453264Abstract: A compound of the following formula ##STR1## wherein m is an integer of 1 to 3, R.sub.1 and R.sub.2 are the same or different and each is hydrogen atom or lower alkyl, and R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are the same or different and each is hydroxy or a ##STR2## (wherein n is 0 or 1, X is --NH-- or --O--, Y is alkylene, A is hydrogen atom, lower alkyl, lower alkoxy, halogen atom or trifluoromethyl, and B is alkyl or alkenyl), with the proviso that two or three of R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are hydroxyl groups and that when two of them are hydroxyl groups, the cases where R.sub.3 and R.sub.5 are hydroxy, and R.sub.4 and R.sub.6 are hydroxy are excluded; a complex compound comprising said compound and a metallic atom; and a diagnostic agent containing said complex compound. The above compound is useful as a chelating agent and the complex compound comprising said compound and a metallic atom exhibits superior characteristics as a contrast medium for image diagnosis.Type: GrantFiled: March 3, 1994Date of Patent: September 26, 1995Assignee: The Green Cross CorporationInventors: Fumio Mori, Tadashi Okano, Kazuki Murakami, Masakazu Shintome, Hiromichi Mukai, Ikuko Miyagi, Takashi Imagawa, Sang-Won Kim, Taro Marukawa, Takahiro Kozuka