Patents by Inventor Naoki Nishigaki
Naoki Nishigaki 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: 20220142754Abstract: The present invention provides a dental mill blank having an excellent mechanical strength and an excellent water resistance according to which a decrease in mechanical strength can be suppressed even in an environment where water is present, for example, inside an oral cavity. The present invention relates to a dental mill blank including: a polymer (A); and continuous inorganic fibers (B) that are oriented substantially in one direction, wherein the dental mill blank has a decreasing rate of 40% or less in three-point flexural strength after immersion in 70° C. water for seven days.Type: ApplicationFiled: February 13, 2020Publication date: May 12, 2022Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Hirotaka HORIGUCHI, Naoki NISHIGAKI
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Patent number: 11304879Abstract: The present invention provides a dental adhesive composition that, even after photocuring with a high-output LED irradiator, shows high bond strength not only for dentin untreated by phosphoric acid etching but also for dentin treated by phosphoric acid etching. The present invention relates to a dental adhesive composition comprising a phosphoric acid group-containing polymerizable monomer (A), the phosphoric acid group-containing polymerizable monomer (A) comprising: a dihydrogen phosphate monoester group-containing polymerizable monomer (A-1) represented by general formula (1); a hydrogen phosphate diester group-containing polymerizable monomer (A-2) represented by general formula (2); and a phosphoric acid tetraester group-containing polymerizable monomer (A-3) represented by general formula (3).Type: GrantFiled: April 19, 2019Date of Patent: April 19, 2022Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Yamato Nojiri, Naoki Nishigaki, Mitsunobu Kawashima
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Publication number: 20220071852Abstract: The present invention provides a dental adhesive composition that exhibits high bond strength (initial bond strength and bond durability) to sandblasted zirconia. The present invention relates to a dental adhesive composition comprising a dihydrogen phosphate monoester group-containing polymerizable monomer (A) represented by a general formula (1) and a dihydrogen phosphate monoester group-containing compound (B) represented by a general formula (2). (The definitions of the symbols are omitted.Type: ApplicationFiled: December 20, 2019Publication date: March 10, 2022Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Yamato NOJIRI, Naoki NISHIGAKI, Mitsunobu KAWASHIMA
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Publication number: 20210145701Abstract: The present invention provides a dental adhesive composition that, even after photocuring with a high-output LED irradiator, shows high bond strength not only for dentin untreated by phosphoric acid etching but also for dentin treated by phosphoric acid etching. The present invention relates to a dental adhesive composition comprising a phosphoric acid group-containing polymerizable monomer (A), the phosphoric acid group-containing polymerizable monomer (A) comprising: a dihydrogen phosphate monoester group-containing polymerizable monomer (A-1) represented by general formula (1); a hydrogen phosphate diester group-containing polymerizable monomer (A-2) represented by general formula (2); and a phosphoric acid tetraester group-containing polymerizable monomer (A-3) represented by general formula (3).Type: ApplicationFiled: April 19, 2019Publication date: May 20, 2021Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Yamato NOJIRI, Naoki NISHIGAKI, Mitsunobu KAWASHIMA
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Patent number: 10786435Abstract: The present invention provides a composition for optical three-dimensional modeling that offers desirable shape accuracy in optical three-dimensional modeling, and that provides desirable transparency and mechanical characteristics upon being cured. The present invention relates to a composition for optical three-dimensional modeling comprising a polymerizable monomer (a), an ultraviolet-absorbing inorganic particle (b), and a photopolymerization initiator (c).Type: GrantFiled: October 13, 2017Date of Patent: September 29, 2020Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Kenji Suzuki, Naoki Nishigaki
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Publication number: 20190254936Abstract: The present invention provides a composition for optical three-dimensional modeling that offers desirable shape accuracy in optical three-dimensional modeling, and that provides desirable transparency and mechanical characteristics upon being cured. The present invention relates to a composition for optical three-dimensional modeling comprising a polymerizable monomer (a), an ultraviolet-absorbing inorganic particle (b), and a photopolymerization initiator (c).Type: ApplicationFiled: October 13, 2017Publication date: August 22, 2019Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Kenji SUZUKI, Naoki NISHIGAKI
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Patent number: 10231905Abstract: The present invention relates to providing a dental curable composition that, when cured, has high metal ion release ability and highly durable physical properties. The dental curable composition of the present invention includes: a sugar compound having an —XM group, where —X is an acid anion group and M is a metal cation; and a curable component.Type: GrantFiled: March 25, 2014Date of Patent: March 19, 2019Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Mitsunobu Kawashima, Mitsuru Takei, Naoki Nishigaki, Shumei Ishihara, Kenji Hatanaka, Hiroshige Ishino, Akiko Tsuji
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Patent number: 9915568Abstract: A circuit device including: a detection circuit (10) that performs A/D conversion of a first detection voltage (VD1) that is detected by using a thermopile (2), and outputs a first detection value (DT1) that is a digital value, and performs A/D conversion of a second detection voltage (VD2) that is detected by using a thermistor (4), and outputs a second detection value (DT2) that is a digital value; and a control unit (50) that obtains a self-temperature by using the second detection value (DT2), obtains a second electromotive voltage that corresponds to the self-temperature by using the self-temperature, obtains a first electromotive voltage that corresponds to an object's temperature by using the first detection value (DT1) and the second electromotive voltage, and obtains the object's temperature by using the first electromotive voltage.Type: GrantFiled: March 23, 2015Date of Patent: March 13, 2018Assignee: SEIKO EPSON CORPORATIONInventors: Kota Onishi, Tsutae Hinata, Yukinari Shibata, Chihiro Fukumoto, Naoki Nishigaki, Koji Kawaguchi
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Patent number: 9271901Abstract: The present invention provides a one-part dental adhesive composition that exhibits excellent adhesive property and bond durability to a tooth structure (particularly dentin) and has high stability to ambient light, in which respective components have been mixed uniformly. The present invention is a one-part dental adhesive composition including a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having a fluorocarbon group represented by the general formula (1), water (C), and a polymerization initiator (D). A content of the polymerizable monomer (A) having an acidic group is 5.5 to 35 parts by weight in 100 parts by weight of the total amount of polymerizable monomers. (In the formula, R1 denotes a hydrogen atom or a methyl group, and Rf denotes a fluoroalkyl group having 1 to 20 carbon atoms.Type: GrantFiled: March 25, 2011Date of Patent: March 1, 2016Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Ai Hinamoto, Naoki Nishigaki, Naofumi Murata
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Publication number: 20160038382Abstract: The present invention relates to providing a dental curable composition that, when cured, has high metal ion release ability and highly durable physical properties. The dental curable composition of the present invention includes: a sugar compound having an —XM group, where —X is an acid anion group and M is a metal cation; and a curable component.Type: ApplicationFiled: March 25, 2014Publication date: February 11, 2016Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Mitsunobu KAWASHIMA, Mitsuru TAKEI, Naoki NISHIGAKI, Shumei ISHIHARA, Kenji HATANAKA, Hiroshige ISHINO, Akiko TSUJI
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Publication number: 20150276499Abstract: A circuit device including: a detection circuit (10) that performs A/D conversion of a first detection voltage (VD1) that is detected by using a thermopile (2), and outputs a first detection value (DT1) that is a digital value, and performs A/D conversion of a second detection voltage (VD2) that is detected by using a thermistor (4), and outputs a second detection value (DT2) that is a digital value; and a control unit (50) that obtains a self-temperature by using the second detection value (DT2), obtains a second electromotive voltage that corresponds to the self-temperature by using the self-temperature, obtains a first electromotive voltage that corresponds to an object's temperature by using the first detection value (DT1) and the second electromotive voltage, and obtains the object's temperature by using the first electromotive voltage.Type: ApplicationFiled: March 23, 2015Publication date: October 1, 2015Inventors: Kota ONISHI, Tsutae HINATA, Yukinari SHIBATA, Chihiro FUKUMOTO, Naoki NISHIGAKI, Koji KAWAGUCHI
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Publication number: 20130012615Abstract: The present invention provides a one-part dental adhesive composition that exhibits excellent adhesive property and bond durability to a tooth structure (particularly dentin) and has high stability to ambient light, in which respective components have been mixed uniformly. The present invention is a one-part dental adhesive composition including a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having a fluorocarbon group represented by the general formula (1), water (C), and a polymerization initiator (D). A content of the polymerizable monomer (A) having an acidic group is 5.5 to 35 parts by weight in 100 parts by weight of the total amount of polymerizable monomers. (In the formula, R1 denotes a hydrogen atom or a methyl group, and Rf denotes a fluoroalkyl group having 1 to 20 carbon atoms.Type: ApplicationFiled: March 25, 2011Publication date: January 10, 2013Applicant: Kuraray Noritake Dental, Inc.Inventors: Ai Hinamoto, Naoki Nishigaki, Naofumi Murata
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Patent number: 7977405Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a polymerizable monomer (B) having one polymerizable group and at least one hydroxyl group. When a suitable component is added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.Type: GrantFiled: January 16, 2008Date of Patent: July 12, 2011Assignee: Kurray Medical Inc.Inventors: Hiroshige Ishino, Takahiro Sekiguchi, Koichi Okada, Naoki Nishigaki
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Publication number: 20100130682Abstract: The present invention provides a polymerizable composition that exhibits excellent adhesive properties to a tooth structure (particularly dentin) when applied as a dental material, and a polymerizable monomer that is used as a component of the polymerizable composition. The present invention is a polymerizable monomer (A) that is a compound having at least two polymerizable groups. The polymerizable monomer (A) has a retention time of 7 minutes to 30 minutes in a high-performance liquid chromatography (HPLC) measurement conducted under a condition in which a column with an inner diameter of 3.9 mm and a length of 300 mm, packed with a C18 packing material having been crushed to have an average particle size of 10 ?m and a pore size of 125 angstroms, is used, an eluent is a mixed solvent of methanol and water contained at a ratio of 3:7, a flow rate is 1.0 mL/minute, a measurement temperature is 50° C.Type: ApplicationFiled: January 16, 2008Publication date: May 27, 2010Applicant: Kuraray Medical Inc.Inventors: Ai Hinamoto, Hiroshige Ishino, Takahiro Sekiguchi, Koichi Okada, Mitsuru Takei, Naoki Nishigaki
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Publication number: 20100048762Abstract: The present invention provides a composition that exhibits excellent adhesive properties to tooth structure (particularly dentin) when applied as a dental material. The present invention is a composition containing a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups, and a bisacylphosphine oxide (B) represented by the following formula (1): where the respective symbols are as defined in the specification.Type: ApplicationFiled: January 16, 2008Publication date: February 25, 2010Applicant: Kuraray Medical Inc.Inventors: Hiroshige Ishino, Takahiro Sekiguchi, Koichi Okada, Naoki Nishigaki, Ai Hinamoto, Mariko Sugiura
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Publication number: 20100036075Abstract: The present invention provides a composition suitable for a dental composition. The present invention is a composition containing: a polymerizable monomer (A) having an unconjugated carbon chain with at least four carbon atoms bonded continuously, at least two polymerizable groups, and at least two hydroxyl groups; and a polymerizable monomer (B) having one polymerizable group and at least one hydroxyl group. When a suitable component is added to this composition, the resultant composition can be used suitably for dental materials such as a primer, bonding material, composite resin, and cement.Type: ApplicationFiled: January 16, 2008Publication date: February 11, 2010Applicant: Kuraray Medical Inc.Inventors: Hiroshige Ishino, Takahiro Sekiguchi, Koichi Okada, Naoki Nishigaki
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Patent number: 7655722Abstract: The present invention relates to adhesive compositions having: a phosphate group-containing monomer (a) having a fluorocarbon group represented by Chemical Formula 1; and a solvent (b), where R is a hydrogen atom or a methyl group, n, p and q are natural numbers 2?n?10, p+q?n and p+q+n?13.Type: GrantFiled: April 13, 2006Date of Patent: February 2, 2010Assignee: Kuraray Medical Inc.Inventors: Kazumitsu Nakatsuka, Naoki Nishigaki, Mitsunobu Kawashima
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Patent number: 7615582Abstract: A hydrophobic acidic group-containing polymeric monomer (a); a water-soluble polymeric monomer (b); water (c); a photopolymerization initiator (d); an aromatic tertiary amine (e) having an electron-withdrawing group; a cross-linkable polymeric monomer (f); and a basic compound (g) for producing a water-soluble salt through a reaction with a part of the hydrophobic acidic group-containing polymeric monomer (a) are included as essential compounding ingredients. A one-part dental adhesive composition that exhibits high adhesive strength and high storage stability in adhesion between a teeth, and more particularly enamel or dentine, and a dental repairing material, and more particularly a resin material, is provided.Type: GrantFiled: December 8, 2004Date of Patent: November 10, 2009Assignee: Kuraray Medical Inc.Inventors: Kazumitsu Nakatsuka, Naoki Nishigaki
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Publication number: 20090023856Abstract: The invention provides an adhesive composition including a specific phosphate group-containing monomer (a) having a fluorocarbon group, and a solvent (b). An adhesive composition that is suitably used in the fields of medical care, electronic industry, precision machinery industry, jewel industry and so on, exhibits high bond strength and high adhesive durability and is minimally varied in bond strength is provided. The adhesive composition of this invention exhibits high adhesive durability and high coloring resistance on dental restorative materials such as ceramics, a composite resin cured substance, porcelain and a metal, and in particular, on a novel dental restorative material such as hybrid ceramics or a metal oxide-based high strength ceramics, and therefore it is suitably used in the dental field.Type: ApplicationFiled: April 13, 2006Publication date: January 22, 2009Applicant: Kuraray Medical Inc.Inventors: Kazumitsu Nakatsuka, Naoki Nishigaki, Mitsunobu Kawashima
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Publication number: 20070100020Abstract: A hydrophobic acidic group-containing polymeric monomer (a); a water-soluble polymeric monomer (b); water (c); a photopolymerization initiator (d); an aromatic tertiary amine (e) having an electron-withdrawing group; a cross-linkable polymeric monomer (f); and a basic compound (g) for producing a water-soluble salt through a reaction with a part of the hydrophobic acidic group-containing polymeric monomer (a) are included as essential compounding ingredients. A one-part dental adhesive composition that exhibits high adhesive strength and high storage stability in adhesion between a teeth, and more particularly enamel or dentine, and a dental repairing material, and more particularly a resin material, is provided.Type: ApplicationFiled: December 8, 2004Publication date: May 3, 2007Applicant: Kuraray Medical Inc.Inventors: Kazumitsu Nakatsuka, Naoki Nishigaki