Patents by Inventor Naoyuki Kitamura
Naoyuki Kitamura 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: 20240123261Abstract: The purpose is to prevent the irradiation beam from leaking between the beam irradiation port of the radiation therapy device and the patient affected area that is the target of the emitted irradiation beam, a radiation shielding jig comprising a tare filled with shielding material particles; the tare is made of a resin fabric and has a hollow three-dimensional shape with a radiation pathway portion, the shielding material particles comprising a mixture of sintered particles having a predetermined particle diameter with radiation shielding performance and resin particles having a predetermined particle diameter.Type: ApplicationFiled: October 5, 2023Publication date: April 18, 2024Inventors: Hiroaki KUMADA, Naoyuki KITAMURA, Tetsuyuki NAKAMURA, Takeshi IKEDA
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Patent number: 11866611Abstract: The purpose of the present invention is to provide a plasma spray material which is capable of forming a hydroxyapatite film that exhibits high adhesion strength with respect to substrates such as metal substrates. When used as a plasma spray material, hydroxyapatite powder having a modal diameter of 550-1000 nm in a pore diameter of at most 5000 nm as measured by a mercury intrusion method is capable of forming a hydroxyapatite film that exhibits high adhesion strength with respect to substrates such as metal substrates.Type: GrantFiled: December 6, 2018Date of Patent: January 9, 2024Assignee: TOMITA PHARMACEUTICAL CO., LTD.Inventors: Naoyuki Kitamura, Akihito Bando, Yuta Tsumura, Shota Minami
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Publication number: 20230226255Abstract: The present invention addresses the problem of providing a plasma spraying material with which it is possible to form an HAp film that has high hardness and is not susceptible to abrasion, even under conditions involving plasma spraying with low flame energy. In the present invention, an HAp powder having an average particle diameter (D50) of 15-40 ?m and a pore volume of 0.01-0.30 cc/g at a pore diameter of 2000 nm or less as measured through mercury intrusion makes it possible to form an HAp film that has high hardness, is not susceptible to abrasion, and can be subjected to plasma spraying, even under conditions involving plasma spraying with low flame energy.Type: ApplicationFiled: June 30, 2021Publication date: July 20, 2023Inventors: Naoyuki KITAMURA, Akihito BANDO, Yuta TSUMURA, Yohei KUSHIKI
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Publication number: 20230227672Abstract: An object of the present invention is to provide a calcium phosphate powder that enables the preparation of a slurry for additive manufacturing with excellent dispersion stability, and enables the production of a three-dimensional additive manufacturing article with high strength, in additive manufacturing. Provided is a calcium phosphate powder, having an average particle size (D50) of 0.1 to 5.0 ?m, and having a pore volume of mesopores (pore size: 2 to 50 nm) of 0.01 to 0.06 cc/g as measured by a gas adsorption method. The calcium phosphate powder has excellent dispersion stability in a slurry for additive manufacturing, and, by performing additive manufacturing using a slurry for additive manufacturing containing the calcium phosphate, it is possible to produce a three-dimensional additive manufacturing article with high strength, which is useful as an implant, such as an artificial bone.Type: ApplicationFiled: July 16, 2021Publication date: July 20, 2023Inventors: Yohei KUSHIKI, Akihito BANDO, Nozomu HASHIMOTO, Naoyuki KITAMURA
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Publication number: 20220336117Abstract: As a sintered body for a radiation shielding material, which can effectively shield mainly low-energy-level neutrons, that is, thermal neutrons and lower, slow neutrons, and has excellent physical properties such as bending strength and Vickers hardness, leading to high machining strength, a sintered body for a radiation shielding material comprising LiF ranging between 99 wt. % to 5 wt. %, and one or more fluorides selected from among MgF2, CaF2, AlF3, KF, NaF, and/or YF3 ranging between 1 wt. % to 95 wt. %, having physical properties of a relative density of 92% or more, a bending strength of 50 MPa or more, and a Vickers hardness of 100 or more, is provided.Type: ApplicationFiled: August 20, 2021Publication date: October 20, 2022Applicants: UNIVERSITY OF TSUKUBA, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, DAICO MFG CO., LTD.Inventors: Hiroaki KUMADA, Naoyuki KITAMURA, Tetsuyuki NAKAMURA, Takeshi IKEDA
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Publication number: 20200347239Abstract: The purpose of the present invention is to provide a plasma spray material which is capable of forming a hydroxyapatite film that exhibits high adhesion strength with respect to substrates such as metal substrates. When used as a plasma spray material, hydroxyapatite powder having a modal diameter of 550-1000 nm in a pore diameter of at most 5000 nm as measured by a mercury intrusion method is capable of forming a hydroxyapatite film that exhibits high adhesion strength with respect to substrates such as metal substrates.Type: ApplicationFiled: December 6, 2018Publication date: November 5, 2020Inventors: Naoyuki KITAMURA, Akihito BANDO, Yuta TSUMURA, Shota MINAMI
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Patent number: 10531684Abstract: Provided is a powder containing ferric pyrophosphate that affords high iron absorbability, as a main component of an oral iron preparation. The present invention relates to a composite powder containing ferric pyrophosphate, which is a powder containing ferric pyrophosphate and a sodium component, wherein (1) the content of ferric pyrophosphate is 95 wt % or higher, and (2) a (Fe+Na)/P molar ratio is 0.8 to 1.0.Type: GrantFiled: December 10, 2015Date of Patent: January 14, 2020Assignee: TOMITA PHARMACEUTICAL CO., LTD.Inventors: Sadayoshi Watanabe, Yukinori Konishi, Shota Minami, Akihito Bando, Naoyuki Kitamura
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Publication number: 20180249750Abstract: Provided is a powder containing ferric pyrophosphate that affords high iron absorbability, as a main component of an oral iron preparation. The present invention relates to a composite powder containing ferric pyrophosphate, which is a powder containing ferric pyrophosphate and a sodium component, wherein (1) the content of ferric pyrophosphate is 95 wt % or higher, and (2) a (Fe+Na)/P molar ratio is 0.8 to 1.0.Type: ApplicationFiled: December 10, 2015Publication date: September 6, 2018Inventors: SADAYOSHI WATANABE, YUKINORI KONISHI, SHOTA MINAMI, AKIHITO BANDO, NAOYUKI KITAMURA
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Patent number: 8404604Abstract: A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number ?d of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.Type: GrantFiled: February 9, 2009Date of Patent: March 26, 2013Assignees: Nihon Yamamura Glass Co., Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tatsuo Hidaka, Junichi Nakamura, Yoshitaka Mayumi, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Patent number: 8298974Abstract: An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO2, 30.5-50.0 wt. % B2O3, 1.1-8.0 wt. % Li2O, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % Y2O3, and 10.0-19.5 wt. % La2O3.Type: GrantFiled: September 25, 2009Date of Patent: October 30, 2012Assignees: Nihon Yamamura Glass Co, Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tatsuo Hidaka, Junichi Nakamura, Takuro Ikeda, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Publication number: 20120088109Abstract: A linear polyimide is produced from mellophanic dianhydride, diamine (NH2-A-NH2), and a monofunctional acid anhydride and contains a repeating unit represented by the following general formula (3): wherein A represents a divalent aromatic diamine residue or aliphatic diamine residue, B represents a monofunctional acid anhydride residue, and n represents a degree of polymerization.Type: ApplicationFiled: May 26, 2009Publication date: April 12, 2012Applicant: JFE CHEMICAL CORPORATIONInventors: Masatoshi Hasegawa, Naoyuki Kitamura
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Publication number: 20110172078Abstract: An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO2, 30.5-50.0 wt. % B2O3, 1.1-8.0 wt. % Li2O, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % Y2O3, and 10.0-19.5 wt. % La2O3.Type: ApplicationFiled: September 25, 2009Publication date: July 14, 2011Inventors: Tatsuo Hidaka, Junichi Nakamura, Takuro Ikeda, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Publication number: 20100317504Abstract: A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number ?d of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.Type: ApplicationFiled: February 9, 2009Publication date: December 16, 2010Applicant: National Institute of Advanced Industrial Sciences and TechnologyInventors: Tatsuo Hidaka, Junichi Nakamura, Yoshitaka Mayumi, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Publication number: 20100147564Abstract: Disclosed is a linear polyimide precursor having an intrinsic viscosity of not less than 0.5 dL/g and composed of a repeating unit represented by at least one formula selected from the group consisting of the general formula (1) below and the general formula (2) below. In the general formulae (1) and (2), X represents a divalent aromatic group other than a residue of 1,4-bis(4-aminophenoxy)benzene and a residue of bis(4-amino-3-methylphenyl)methane or an aliphatic group. Since this linear polyimide precursor has high glass transition temperature and high toughness, while exhibiting excellent solubility and thermoplasticity, it is suitably used as a raw material for an asymmetric polyimide which is useful as an adhesive resin for flexible printed circuits (FPC) or the like.Type: ApplicationFiled: May 8, 2008Publication date: June 17, 2010Applicant: JFE CHEMICAL CORPORATIONInventors: Masatoshi Hasegawa, Naoyuki Kitamura
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Publication number: 20100056824Abstract: A method for preparation of 1,2,3,4-benzenetetracarboxylic acid includes oxidizing 1,2,3,4,5,6,7,8-octahydrophenanthrene with potassium permanganate.Type: ApplicationFiled: March 25, 2008Publication date: March 4, 2010Applicant: JFE CHEMICAL CORPORATIONInventor: Naoyuki Kitamura
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Patent number: 7138484Abstract: A method for producing a polymerized hydrocarbon includes a step of a dehalogenation of a halogenated hydrocarbon with a magnesium-diene complex. Low-molecular-weight compounds, such as dimers or trimers of hydrocarbon units, oligomers of hydrocarbon units, or polymers of hydrocarbon units can be produced by this method while generating significantly less odor.Type: GrantFiled: September 30, 2004Date of Patent: November 21, 2006Assignee: JFE Chemical CorporationInventors: Takakazu Yamamoto, Naoyuki Kitamura, Hiroki Fukumoto
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Patent number: 7059036Abstract: An electronic component mounting apparatus which employs a first air feed device connected to an air passage at one end part of a spline shaft, and a second air feed device connected to the air passage in the vicinity of the other end of the spline shaft. The first and second air feeds function to supply air to the air passage to return an interior thereof to atmospheric pressure. The time required to return the vacuum pressure in the air passage to atmospheric pressure can be shortened by the use of the two separate air feeds.Type: GrantFiled: April 20, 2005Date of Patent: June 13, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Osamu Okuda, Yoshihiro Yoshida, Akira Kabeshita, Satoshi Shida, Naoyuki Kitamura
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Patent number: 6977313Abstract: A process is provided for the production of 2,7-dibromofluorenone. According to the process, a 2,7-dibromofluorene-contianing raw material is oxidized with molecular oxygen in the presence of a phase transfer catalyst such as a quaternary ammonium salt in a heterogeneous, mixed solvent of an aqueous solution of a caustic alkali and a water-insoluble organic solvent. Crude crystals of 2,7-dibromofluorenone, which have been obtained by the oxidization, can be purified by recrystallization to recover 2,7-dibromofluorenone as crystals having a purity of at least 99 wt. %.Type: GrantFiled: September 23, 2003Date of Patent: December 20, 2005Assignee: JFE Chemical CorporationInventors: Youko Sugio, Naoyuki Kitamura, Hiroaki Mori, Tetsuo Hachiya
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Publication number: 20050183263Abstract: An electronic component mounting apparatus which employs a first air feed device connected to an air passage at one end part of a spline shaft, and a second air feed device connected to the air passage in the vicinity of the other end of the spline shaft. The first and second air feeds function to supply air to the air passage to return an interior thereof to atmospheric pressure. The time required to return the vacuum pressure in the air passage to atmospheric pressure can be shortened by the use of the two separate air feeds.Type: ApplicationFiled: April 20, 2005Publication date: August 25, 2005Inventors: Osamu Okuda, Yoshihiro Yoshida, Akira Kabeshita, Satoshi Shida, Naoyuki Kitamura
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Patent number: 6895662Abstract: An electronic component mounting apparatus which employs a first air feed device connected to an air passage at one end part of a spline shaft, and a second air feed device connected to the air passage in the vicinity of the other end of the spline shaft. The first and second air feeds function to supply air to the air passage to return an interior thereof to atmospheric pressure. The time required to return the vacuum pressure in the air passage to atmospheric pressure can be shortened by the use of the two separate air feeds.Type: GrantFiled: August 6, 2001Date of Patent: May 24, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Osamu Okuda, Yoshihiro Yoshida, Akira Kabeshita, Satoshi Shida, Naoyuki Kitamura