Patents by Inventor Taku Kato
Taku Kato 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: 20240141155Abstract: Provided is a method for producing a fluoropolymer composition, comprising bringing a fluoropolymer raw material into contact with an oxidizing agent, wherein the fluoropolymer raw material is obtained by polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) derived from a monomer (I) represented by the general formula (I). CX1X3?CX2R(—CZ1Z2-A0)m??(I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.Type: ApplicationFiled: December 26, 2023Publication date: May 2, 2024Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yoshinori NANBA, Kenji ICHIKAWA, Taketo KATO, Taku YAMANAKA
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Publication number: 20240117077Abstract: A composition containing polytetrafluoroethylene and substantially free from a compound represented by Formula (3): (H—(CF2)8—SO3)qM2 wherein M2 is H, a metal atom, NR54 (where R5s may be the same as or different from each other and are each H or an organic group having 1 to 10 carbon atoms), an imidazolium optionally having a substituent, a pyridinium optionally having a substituent, or a phosphonium optionally having a substituent, and q is 1 or 2. Also disclosed is a molded boy including the composition.Type: ApplicationFiled: November 7, 2023Publication date: April 11, 2024Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro TAIRA, Kazuhiro MISHIMA, Chiaki OKUI, Tadao HAYASHI, Hirotoshi YOSHIDA, Yuuji TANAKA, Masayoshi MIYAMOTO, Taku YAMANAKA, Taketo KATO
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Publication number: 20240117087Abstract: A method for producing a fluoropolymer which method includes polymerizing a perfluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the content of a polymerized unit derived from the perfluoromonomer in the fluoropolymer is 90 mol % or more based on all polymerized units of the fluoropolymer, the polymer (1) is a polymer of a monomer (1) represented by the general formula (1): CF2?CF—O—R-(Rf-SO3M)m, a polymerized unit (1) derived from the monomer (1) in the polymer (1) is 50% by mass or more based on all polymerized units of the polymer (1), and the content of a dimer and a trimer of the monomer (1) in the polymer (1) is 1.0% by mass or less based on the polymer (1).Type: ApplicationFiled: November 17, 2023Publication date: April 11, 2024Applicant: DAIKIN INDUSTRIES, LTDInventors: Yoshinori NANBA, Rina TAMAI, Takuma IWASAKA, Soushi TSUCHIYA, Kenji ICHIKAWA, Taketo KATO, Masaki IRIE, Taku YAMANAKA
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Patent number: 11952441Abstract: A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.Type: GrantFiled: October 3, 2019Date of Patent: April 9, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Taketo Kato, Yohei Fujimoto, Kenji Ichikawa, Hiroyuki Sato, Yoshinori Nanba, Hirotoshi Yoshida, Kengo Ito, Chiaki Okui, Masamichi Sukegawa, Taku Yamanaka
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Patent number: 10899891Abstract: A polymerizable composition includes 100 parts by mass of a reactive polysiloxane being a polycondensation product of an alkoxy silicon compound including at least an alkoxy silicon compound of formula [1], and 10 to 500 parts by mass of a polymerizable compound having at least one polymerizable double bond. (X is a phenyl group having at least one substituent having a polymerizable double bond, a naphthyl group having at least one substituent having a polymerizable double bond, a biphenyl group having at least one substituent having a polymerizable double bond, or a phenanthryl group having at least one substituent having a polymerizable double bond, Ar1 is a condensed ring hydrocarbon group having two or more benzene ring structures, or a hydrocarbon ring assembly group in which two or more aromatic rings are directly bonded through a single bond, and R1 is methyl group, ethyl group, or isopropyl group).Type: GrantFiled: May 24, 2017Date of Patent: January 26, 2021Assignee: NISSAN CHEMICAL CORPORATIONInventors: Takehiro Nagasawa, Taku Kato, Keisuke Shuto
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Patent number: 10894800Abstract: A polymerizable silane compound that yields a cured product exhibiting a high refractive index and a low Abbe number, used in a polymerizable composition for preparing a molded article having higher transparency. A polysiloxane being a polycondensation product of the compound of formula [1]: (wherein X is a phenyl group having at least one substituent having a polymerizable double bond, a naphthyl group having at least one substituent having a polymerizable double bond, a biphenyl group having at least one substituent having a polymerizable double bond, or a phenanthryl group having at least one group having a polymerizable double bond, Ar1 is a condensed polycyclic hydrocarbon group (optionally substituted with a C1-6 alkyl group), or a hydrocarbon ring assembly group wherein two or more aromatic rings are directly bonded through a single bond (optionally substituted with a C1-6 alkyl group), and R1 is a methyl, ethyl, or isopropyl group).Type: GrantFiled: May 9, 2017Date of Patent: January 19, 2021Assignee: NISSAN CHEMICAL CORPORATIONInventors: Keisuke Shuto, Taku Kato, Takehiro Nagasawa
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Patent number: 10787535Abstract: A polymerizable composition which can be cured into a cured product exhibiting a low Abbe's number and is suitable for producing a molded article having a further high transparency. A polymerizable composition including 100 parts by mass of a reactive silsesquioxane compound containing a phenanthrene ring (a), and 10 to 500 parts by mass of a polymerizable compound having at least one polymerizable double bond (b), a cured product of the polymerizable composition, and a method for producing a molded article by using of the polymerizable composition.Type: GrantFiled: March 30, 2017Date of Patent: September 29, 2020Assignee: NISSAN CHEMICAL CORPORATIONInventors: Takehiro Nagasawa, Taku Kato, Keisuke Shuto
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Patent number: 10703863Abstract: There is provided a polymerizable composition suitable to produce a molded product in which high refractive index is maintained, and dimensional change and a transmittance change further caused by a high-temperature heat history can be suppressed. A polymerizable composition comprising (a) 100 parts by mass of a specific reactive silsesquioxane compound and (b) 10 to 2,000 parts by mass of a specific fluorene compound, and a cured product obtained by curing the polymerizable composition, and a resin lens manufactured from the polymerizable composition.Type: GrantFiled: September 1, 2016Date of Patent: July 7, 2020Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Kei Yasui, Takehiro Nagasawa, Taku Kato, Keisuke Shuto
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Patent number: 10676643Abstract: A coating film-forming composition includes a hydrolysis-condensation product of a hydrolyzable silane and fine inorganic particles subjected to a special dispersion treatment, that can be formed into a highly heat-resistant, highly transparent coating film capable of exhibiting a high refractive index and having a large thickness and excellent storage stability as a coating composition; and a process for producing the coating film-forming composition.Type: GrantFiled: March 27, 2017Date of Patent: June 9, 2020Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Taku Kato, Masayoshi Suzuki, Natsumi Murakami, Daiki Iijima, Tomoki Furukawa, Yoshinari Koyama
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Patent number: 10450418Abstract: A polymerizable composition suitable for producing a molded article that can maintain a high refractive index and a low Abbe's number and can be restrained from dimensional changes due to a high-temperature thermal history has (a) 100 parts by mass of a specific reactive silsesquioxane compound, (b) 10 to 500 parts by mass of a specific fluorene compound and (c) 1 to 100 parts by mass of a specific aromatic vinyl compound. A cured product can be obtained by curing the polymerizable composition.Type: GrantFiled: August 12, 2016Date of Patent: October 22, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Takehiro Nagasawa, Taku Kato, Kentaro Ohmori, Keisuke Shuto, Kenji Takase
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Patent number: 10431962Abstract: An ignition plug includes a metallic shell containing iron as a main component, carbon in an amount of 0.20 wt. % to 0.30 wt. %, manganese in an amount of 0.30 wt. % to 0.45 wt. %, and sulfur in an amount of 0.005 wt. % to 0.009 wt. %. The ratio of the manganese content (wt. %) to the sulfur content (wt. %); i.e., Mn/S is 40 to 65.Type: GrantFiled: July 10, 2017Date of Patent: October 1, 2019Assignee: NGK SPARK PLUG CO., LTD.Inventors: Taku Kato, Yohei Kozakai
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Publication number: 20190292324Abstract: A polymerizable composition suitable for producing a molded article that can maintain a high refractive index and a low Abbe's number and can be restrained from dimensional changes due to a high-temperature thermal history has (a) 100 parts by mass of a specific reactive silsesquioxane compound, (b) 10 to 500 parts by mass of a specific fluorene compound and (c) 1 to 100 parts by mass of a specific aromatic vinyl compound. A cured product can be obtained by curing the polymerizable composition.Type: ApplicationFiled: August 12, 2016Publication date: September 26, 2019Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Takehiro NAGASAWA, Taku KATO, Kentaro OHMORI, Keisuke SHUTO, Kenji TAKASE
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Publication number: 20190256664Abstract: A polymerizable composition includes 100 parts by mass of a reactive polysiloxane being a polycondensation product of an alkoxy silicon compound including at least an alkoxy silicon compound of formula [1], and 10 to 500 parts by mass of a polymerizable compound having at least one polymerizable double bond. (X is a phenyl group having at least one substituent having a polymerizable double bond, a naphthyl group having at least one substituent having a polymerizable double bond, a biphenyl group having at least one substituent having a polymerizable double bond, or a phenanthryl group having at least one substituent having a polymerizable double bond, Ar1 is a condensed ring hydrocarbon group having two or more benzene ring structures, or a hydrocarbon ring assembly group in which two or more aromatic rings are directly bonded through a single bond, and R1 is methyl group, ethyl group, or isopropyl group).Type: ApplicationFiled: May 24, 2017Publication date: August 22, 2019Applicant: NISSAN CHEMICAL CORPORATIONInventors: Takehiro NAGASAWA, Taku KATO, Keisuke SHUTO
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Publication number: 20190256533Abstract: A polymerizable silane compound that yields a cured product exhibiting a high refractive index and a low Abbe number, used in a polymerizable composition for preparing a molded article having higher transparency. A polysiloxane being a polycondensation product of the compound of formula [1]: (wherein X is a phenyl group having at least one substituent having a polymerizable double bond, a naphthyl group having at least one substituent having a polymerizable double bond, a biphenyl group having at least one substituent having a polymerizable double bond, or a phenanthryl group having at least one group having a polymerizable double bond, Ar1 is a condensed polycyclic hydrocarbon group (optionally substituted with a C1-6 alkyl group), or a hydrocarbon ring assembly group wherein two or more aromatic rings are directly bonded through a single bond (optionally substituted with a C1-6 alkyl group), and R1 is a methyl, ethyl, or isopropyl group).Type: ApplicationFiled: May 9, 2017Publication date: August 22, 2019Applicant: NISSAN CHEMICAL CORPORATIONInventors: Keisuke SHUTO, Taku KATO, Takehiro NAGASAWA
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Publication number: 20190237944Abstract: An ignition plug includes a metallic shell containing iron as a main component, carbon in an amount of 0.20 wt. % to 0.30 wt. %, manganese in an amount of 0.30 wt. % to 0.45 wt. %, and sulfur in an amount of 0.005 wt. % to 0.009 wt. %. The ratio of the manganese content (wt. %) to the sulfur content (wt. %); i.e., Mn/S is 40 to 65.Type: ApplicationFiled: July 10, 2017Publication date: August 1, 2019Applicant: NGK SPARK PLUG CO., LTD.Inventors: Taku KATO, Yohei KOZAKAI
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Patent number: 10361850Abstract: According to one embodiment, an authenticator which authenticates an authenticatee, which stores first key information (NKey) that is hidden, includes a memory configured to store second key information (HKey) which is hidden, a random number generation module configured to generate random number information, and a data generation module configured to generate a session key (SKey) by using the second key information (HKey) and the random number information. The authenticator is configured such that the second key information (HKey) is generated from the first key information (NKey) but the first key information (NKey) is not generated from the second key information (HKey).Type: GrantFiled: November 30, 2017Date of Patent: July 23, 2019Assignee: TOSHIBA MEMORY CORPORATIONInventors: Taku Kato, Tatsuyuki Matsushita, Yuji Nagai, Fangming Zhao
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Patent number: 10361851Abstract: According to one embodiment, an authenticator which authenticates an authenticatee, which stores first key information (NKey) that is hidden, includes a memory configured to store second key information (HKey) which is hidden, a random number generation module configured to generate random number information, and a data generation module configured to generate a session key (SKey) by using the second key information (HKey) and the random number information. The authenticator is configured such that the second key information (HKey) is generated from the first key information (NKey) but the first key information (NKey) is not generated from the second key information (HKey).Type: GrantFiled: March 27, 2018Date of Patent: July 23, 2019Assignee: TOSHIBA MEMORY CORPORATIONInventors: Taku Kato, Tatsuyuki Matsushita, Yuji Nagai, Fangming Zhao
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Patent number: 10351651Abstract: A imprint material is provided, and a film that is prepared from the material and to which the pattern is transferred. An imprint material including: (A), (B), (C) and (D) components; a ratio of the amount of the (B) component to a total amount of the (A) component and the (B) component of 100% by mass is 5% by mass or more and 25% by mass or less: (A) a silsesquioxane compound having a repeating unit of Formula (1) and having two or more polymerizable groups of X0 in Formula (1); (B) a silicone compound having a repeating unit of Formula (2) and having two polymerizable groups at ends thereof; (C) a photopolymerization initiator; and (D) a solvent wherein the formulae, R1 and R2 are each independently a C1-3 alkyl group; R0 is a C1-3 alkylene group; and k is an integer of 0 to 3.Type: GrantFiled: October 6, 2014Date of Patent: July 16, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Junpei Kobayashi, Taku Kato, Keisuke Shuto, Masayoshi Suzuki
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Patent number: 10331030Abstract: A novel imprint material and film produced from the material, on which a pattern is transferred. An imprint material having: a component (A); a component (B); a component (C); and a component (D), wherein, (A): a compound of Formula (1), Formula (2), or Formula (3): wherein, X is C1-5 linear alkylene, R1 is H or CH3; each of R2, R3, and R4 is independently H, CH3, or C2H5; and the sum of the number of carbon atoms on R2, R3, and R4 is 0 to 2; (B): a silsesquioxane compound having a repeating unit of Formula (4), and having two or more polymerizable groups of Y; (C): a silicone compound having a repeating unit of Formula (5), and having two polymerizable groups on its ends: wherein, each of R6 and R7 is independently C1-3 alkyl; R5 is C1-3 alkylene; and k is 0 to 3; and (D): photopolymerization initiator.Type: GrantFiled: July 24, 2015Date of Patent: June 25, 2019Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Junpei Kobayashi, Taku Kato, Keisuke Shuto, Masayoshi Suzuki
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Publication number: 20190169345Abstract: A polymerizable composition which can be cured into a cured product exhibiting a low Abbe's number and is suitable for producing a molded article having a further high transparency. A polymerizable composition including 100 parts by mass of a reactive silsesquioxane compound containing a phenathrene ring (a), and 10 to 500 parts by mass of a polymerizable compound having at least one polymerizable double bond (b), a cured product of the polymerizable composition, and a method for producing a molded article by using of the polymerizable composition.Type: ApplicationFiled: March 30, 2017Publication date: June 6, 2019Applicant: NISSAN CHEMICAL CORPORATIONInventors: Takehiro NAGASAWA, Taku KATO, Keisuke SHUTO