Patents by Inventor Toshio Kitamura
Toshio 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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Patent number: 11737957Abstract: A dental curable composition capable of use as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. When a block shape usable as the resin material is produced, while mechanical properties and aesthetic properties required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. The dental curable composition includes (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.001 to 1 part by weight of (d) a chain transfer agent being a terpenoid compound based on 100 parts by weight of the polymerizable monomer (a).Type: GrantFiled: August 30, 2018Date of Patent: August 29, 2023Assignee: SHOFU INC.Inventors: Toshiyuki Nakatsuka, Toshio Kitamura, Masanori Goto, Tomohiro Kai, Satoshi Takano, Yoshiyuki Jogetsu
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Publication number: 20230255734Abstract: The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering.Type: ApplicationFiled: April 19, 2023Publication date: August 17, 2023Applicant: SHOFU INC.Inventors: Toshio KITAMURA, Rieko AIBA
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Patent number: 11660172Abstract: The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering. There is provided a dental cutting zirconia blank wherein the dental cutting zirconia blank has at least one layer consisting of zirconia powder containing 4 to 15 mol % of yttria or erbium oxide as a stabilizer, a relationship among pre-sintering density, final-sintering density and relative density satisfies the following relation: 54?Relative density(%)={(Pre-sintering density)/(Perfect-sintering density)}×100?70.Type: GrantFiled: November 7, 2017Date of Patent: May 30, 2023Assignee: SHOFU INC.Inventors: Toshio Kitamura, Rieko Aiba
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Patent number: 11622840Abstract: To provide a liquid material which can only adjust transparency by applying on a part of a zirconia crown having high transparency, without coloring. The present disclosure provides an opaque imparting liquid used for a prosthesis device cut and machined from a dental zirconia for cutting and machining, comprising; (a) 10 to 39 wt. % of a water-soluble aluminum compound and/or a water-soluble lanthanum compound, (b) 60 to 89 wt. % of water, and (c) 1 to 20 wt. % of an organic solvent.Type: GrantFiled: March 28, 2019Date of Patent: April 11, 2023Assignee: SHOFU INC.Inventors: Toshio Kitamura, Shuhei Takahashi
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Publication number: 20220347927Abstract: A manufacturing method for a prosthetic apparatus for dental purpose according to one aspect of the present invention includes: acquiring scan data of a model that is a reproduction of at least a part of an inside of an oral cavity of a patient; creating shape data of a shaped body for dental purpose on a basis of the scan data; producing a shaped body on a basis of the shape data; covering at least a part of the shaped body and at least a part of a model with film, the shaped body attached to the model; releasing air in a part covered with the film to deform the film and bring the shaped body into close contact with the model; and curing the shaped body in a state where the shaped body is in close contact with the model.Type: ApplicationFiled: September 17, 2020Publication date: November 3, 2022Inventors: Kenji KONO, Hidefumi FUJIMURA, Toshiyuki TANAKA, Yuushin OKIMOTO, Sayaka ISHIDA, Toshio KITAMURA
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Patent number: 11311350Abstract: To provide a resin cured body for dental cutting processing used for cutting and machining using a dental CAD/CAM system, wherein the resin cured body consists of the cured body of a composition comprising: (a) an inorganic filler containing 55 wt. % or more of an element belonging to group II and/or group XIII of the periodic table in terms of an oxide, (b) a polymerizable monomer, and (c) a polymerization initiator.Type: GrantFiled: September 28, 2018Date of Patent: April 26, 2022Assignee: SHOFU INC.Inventors: Mamoru Hosokawa, Toshio Kitamura
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Patent number: 11008671Abstract: An object of the present invention is to improve quality of a group-III nitride crystal, and also improve performance and manufacturing yield of a semiconductor device manufactured using the crystal. Provided is a nitride crystal represented by the composition formula of InxAlyGa1-x-yN (satisfying 0?x?1, 0?y?1, 0?x+y?1), with a hardness exceeding 22.0 GPa as measured by a nanoindentation method using an indenter with a maximum load applied thereto being within a range of 1 mN or more and 50 mN or less.Type: GrantFiled: May 23, 2019Date of Patent: May 18, 2021Assignees: SCIOCS COMPANY LIMITED, SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hajime Fujikura, Taichiro Konno, Takayuki Suzuki, Toshio Kitamura, Tetsuji Fujimoto, Takehiro Yoshida
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Patent number: 10945927Abstract: To provide a phosphate-based dental investment material which can used for metal and press ceramic and especially can impart the lubricity to the surface of a press ceramic, and a phosphate-based dental investment material which can be subjected to a flash heating for press ceramic, can obtain sufficient the hardening expansion, and can easily remove the investment material after press molding. A phosphate-based dental investment material of the present disclosure comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt. %; (b) ammonium dihydrogenphosphate: 8 to 25 wt. % and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica.Type: GrantFiled: May 17, 2018Date of Patent: March 16, 2021Assignee: SHOFU INC.Inventors: Toshio Kitamura, Masahiro Kazama
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Publication number: 20200113658Abstract: To provide a zirconia perfect sintered body which has a chroma of an excellent color tone and excellent translucency as compared with a zirconia mill blank for dental cutting and machining prepared from a zirconia raw material powder containing various stabilizing materials while maintaining high strength, and does not cause deformation.Type: ApplicationFiled: February 20, 2018Publication date: April 16, 2020Applicant: SHOFU INC.Inventors: Seiji BAN, Shuhei TAKAHASHI, Toshio KITAMURA, Rieko AIBA
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Publication number: 20200032417Abstract: An object of the present invention is to improve quality of a group-III nitride crystal, and also improve performance and manufacturing yield of a semiconductor device manufactured using the crystal. Provided is a nitride crystal represented by the composition formula of InxAlyGa1-x-yN (satisfying 0?x?1, 0?y?1, 0?x+y?1), with a hardness exceeding 22.0 GPa as measured by a nanoindentation method using an indenter with a maximum load applied thereto being within a range of 1 mN or more and 50 mN or less.Type: ApplicationFiled: May 23, 2019Publication date: January 30, 2020Inventors: Hajime FUJIKURA, Taichiro KONNO, Takayuki SUZUKI, Toshio KITAMURA, Tetsuji FUJIMOTO, Takehiro YOSHIDA
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Publication number: 20190388196Abstract: To provide a liquid material which can only adjust transparency by applying on a part of a zirconia crown having high transparency, without coloring. The present disclosure provides an opaque imparting liquid used for a prosthesis device cut and machined from a dental zirconia for cutting and machining, comprising; (a) 10 to 39 wt. % of a water-soluble aluminum compound and/or a water-soluble lanthanum compound, (b) 60 to 89 wt. % of water, and (c) 1 to 20 wt. % of an organic solvent.Type: ApplicationFiled: March 28, 2019Publication date: December 26, 2019Applicant: SHOFU INC.Inventors: Toshio KITAMURA, Shuhei TAKAHASHI
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Publication number: 20190380815Abstract: To provide a dental zirconia blank which has high permeability, can reproduce a color tone close to a natural tooth and a strength to be able to tolerate in oral cavity. Furthermore, to provide a dental zirconia blank from which a prosthesis device of 4 or more units having high strength can be prepared. To provide a dental zirconia blank having a plurality of layers, comprising; a first layer consisting of a high permeability ceramic containing 91.6 to 96.5 mol % of zirconium oxide and 3.5 to 8.4 mol % of yttrium oxide, and a second layer consisting of a low permeability ceramic containing 95.6 to 98.5 mol % of zirconium oxide and 1.5 to 4.4 mol % of yttrium oxide, wherein a content rate of yttrium oxide in the low permeability ceramic is lower than a content rate of yttrium oxide in the high permeability ceramic by 0.5 to 5.4 mol %, and the first layer is positioned at one end of the plurality of layers in a layering direction.Type: ApplicationFiled: March 19, 2019Publication date: December 19, 2019Applicant: SHOFU INC.Inventors: Rieko AIBA, Shuhei TAKAHASHI, Toshio KITAMURA
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Patent number: 10470982Abstract: Provided herein is a curable silicone composition that has high optical transparency after being cured and that is in a putty form to be hand-mixable. A curable silicone composition contains: a specific organopolysiloxane as a component (1); a specific organohydrogenpolysiloxane as a component (2); a filler as a component (3); and a catalyst as a component (4). The difference between the refractive index of one of the components (1) to (3) that has the highest refractive index and the refractive index of one of the components (1) to (3) that has the lowest refractive index is 0.1000 or less. The complex viscosity of any of constituent compositions of the curable silicon composition before the curable silicone composition is cured is 10 Pa·s to 100000 Pa·s, as measured under predetermined measurement condition.Type: GrantFiled: September 26, 2014Date of Patent: November 12, 2019Assignee: SHOFU INC.Inventors: Shun Shimosoyama, Toshio Kitamura
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Publication number: 20190209528Abstract: An object of the present invention is to provide a new medicinal drug, a method, use, and a compound; which are for refractory leukemia associated with MLL, for which existing chemotherapy is not effective. According to the present invention, there is provided a medicinal drug for preventing or curing leukemia associated with MLL, containing 5-hydroxy-1H-imidazole-4-carboxamide, or a salt thereof or a hydrate thereof.Type: ApplicationFiled: March 12, 2019Publication date: July 11, 2019Applicant: FUJIFILM CorporationInventors: Hiroyuki IWAMURA, Motoki SAITO, Susumu GOYAMA, Toshio KITAMURA
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Publication number: 20190192257Abstract: To provide a resin cured body for dental cutting processing used for cutting and machining using a dental CAD/CAM system, wherein the resin cured body consists of the cured body of a composition comprising: (a) an inorganic filler containing 55 wt. % or more of an element belonging to group II and/or group XIII of the periodic table in terms of an oxide, (b) a polymerizable monomer, and (c) a polymerization initiator.Type: ApplicationFiled: September 28, 2018Publication date: June 27, 2019Applicant: SHOFU INC.Inventors: Mamoru HOSOKAWA, Toshio KITAMURA
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Patent number: 10290489Abstract: There is provided a method for manufacturing a group-III nitride substrate, including: (a) preparing a substrate which is made of a group III-nitride crystal and which has a high oxygen concentration domain where an oxygen concentration is higher than that of a matrix of the crystal; (b) irradiating the substrate with laser beam aiming at the high oxygen concentration domain, forming a through-hole penetrating the substrate in a thickness direction, and removing at least a part of the high oxygen concentration domain from the substrate; and (c) embedding at least a part of an inside of the through-hole by growing the group-III nitride crystal in the through-hole.Type: GrantFiled: October 20, 2017Date of Patent: May 14, 2019Assignees: Sciocs Company Limited, Sumitomo Chemical Company, LimitedInventors: Toshio Kitamura, Masatomo Shibata, Takehiro Yoshida
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Patent number: 10253432Abstract: A semiconductor substrate manufacturing method includes: epitaxially growing a columnar III nitride semiconductor single crystal on a principal place of a circular substrate; removing a hollow cylindrical region at an outer peripheral edge side of the III nitride semiconductor single crystal to leave a solid columnar region at an inside of the hollow cylindrical region of the III nitride semiconductor single crystal; and slicing the solid columnar region after removing the hollow cylindrical region. The hollow cylindrical region is removed such that the shape of the III nitride semiconductor single crystal is always keeps an axial symmetry that a center axis of the III nitride semiconductor single crystal is defined as a symmetric axis.Type: GrantFiled: January 28, 2014Date of Patent: April 9, 2019Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Masatomo Shibata, Takehiro Yoshida, Toshio Kitamura, Yukio Abe
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Publication number: 20180369076Abstract: A dental curable composition capable of use as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. When a block shape usable as the resin material is produced, while mechanical properties and aesthetic properties required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. The dental curable composition includes (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.001 to 1 part by weight of (d) a chain transfer agent being a terpenoid compound based on 100 parts by weight of the polymerizable monomer (a).Type: ApplicationFiled: August 30, 2018Publication date: December 27, 2018Inventors: Toshiyuki NAKATSUKA, Toshio KITAMURA, Masanori GOTO, Tomohiro KAI, Satoshi TAKANO, Yoshiyuki JOGETSU
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Publication number: 20180333337Abstract: To provide a phosphate-based dental investment material which can used for metal and press ceramic and especially can impart the lubricity to the surface of a press ceramic, and a phosphate-based dental investment material which can be subjected to a flash heating for press ceramic, can obtain sufficient the hardening expansion, and can easily remove the investment material after press molding. A phosphate-based dental investment material of the present disclosure comprising a powder material and a liquid material, wherein the powder material contains (a) magnesium oxide: 5 to 20 wt. %; (b) ammonium dihydrogenphosphate: 8 to 25 wt. % and the liquid material contains (c) aqueous solution including a cation-treated colloidal silica.Type: ApplicationFiled: May 17, 2018Publication date: November 22, 2018Applicant: SHOFU INC.Inventors: Toshio KITAMURA, Masahiro KAZAMA
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Patent number: 10085923Abstract: The present invention relates to a dental curable composition that can be suitably used as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. An object of the present invention is to provide a dental curable composition in which, when a block shape usable as a resin material for dental cutting and machining is produced while mechanical properties such as hardness, bending strength and compressive strength as well as aesthetic property required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. There is provided a dental curable composition including (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and including 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.Type: GrantFiled: June 12, 2015Date of Patent: October 2, 2018Assignee: SHOFU INC.Inventors: Toshiyuki Nakatsuka, Toshio Kitamura, Masanori Goto, Tomohiro Kai, Satoshi Takano, Yoshiyuki Jogetsu