Patents by Inventor Katsuya Kimoto
Katsuya Kimoto 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: 11972917Abstract: A disconnect device includes: a conductor connectable to an external conductive path; a housing that has an internal space and accommodates at least a part of the conductor; and a cooling body that is disposed in the internal space and cools an arc generated in the internal space. The cooling body includes a porous body configured with at least one of a metal oxide and an inorganic oxide.Type: GrantFiled: September 24, 2020Date of Patent: April 30, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Masato Nakamura, Shun Ito, Shinya Kimoto, Katsuya Uruma
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Publication number: 20240076230Abstract: A method for producing an acid-reactive glass powder, an acid-reactive glass powder obtained by the method, and a dental glass ionomer cement composition comprising the acid-reactive glass powder. The dental glass ionomer cement composition has good mixing property, a sufficient working time, and simultaneously can make the dental glass ionomer cement composition exhibit superior mechanical properties. More specifically, a method for producing an acid-reactive glass powder wherein an acid-reactive glass powder having a range of 2 to 10 ?m of a 50% particle size is obtainable by pulverizing a large-particle-size acid-reactive glass powder having a range of 250 to 3000 ?m of a 50% particle size in a state where a small-particle-size acid-reactive glass powder having a range of 1 to 5 ?m of a 50% particle size coexists.Type: ApplicationFiled: August 28, 2023Publication date: March 7, 2024Applicant: KABUSHIKI KAISHA SHOFUInventors: Shuji SAKAMOTO, Takuma ITAGAKI, Manami NISHIMURA, Katsuya KIMOTO
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Patent number: 11504306Abstract: A dental glass ionomer cement composition that exhibits high mechanical properties. In particular, the dental glass ionomer cement composition of the present disclosure comprising (a) non-crosslinked polyalkenoic acid, (b) water, (c) crosslinked polyalkenoic acid: 0.01 to 10 wt. %, and (d) acid-reactive glass powder, exhibits extremely high compressive strength by including the crosslinked polyalkenoic acid in the specified content range.Type: GrantFiled: September 25, 2020Date of Patent: November 22, 2022Assignee: SHOFU INC.Inventors: Shuji Sakamoto, Shun Shimosoyama, Katsuya Kimoto
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Publication number: 20220142875Abstract: The present invention provides a dental glass ionomer cement composition which can improve the mixing efficiency of a powder and a liquid to an extent where their powder to liquid ratio can be raised in mechanical mixing without reducing a fluoride-release property, and further expresses a high mechanical property. More specifically, the present invention provides a dental glass ionomer cement composition in which a powder and a liquid are separately packaged in a dental capsule, and the powder and the liquid are used by mixing immediately before their use, wherein the composition comprises (a) a hydrophobized acid reactive glass powder, (b) a polyalkene acid, and (c) water, and is not accompanied by a polymerization reaction upon setting.Type: ApplicationFiled: November 5, 2021Publication date: May 12, 2022Applicant: KABUSHIKI KAISHA SHOFUInventors: Masahiro TSUKAMOTO, Shuji SAKAMOTO, Katsuya KIMOTO
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Patent number: 11324669Abstract: An object of the present invention is to provide a dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes it difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability. The dental resin-reinforced glass ionomer cement composition consisting of a powder material and a liquid material, wherein the powder material contains (a) acid-reactive glass powder, the liquid material contains (b) water, (c) polymer of acidic group-containing polymerizable monomer, (d) hydroxyl group-containing (meth)acrylate-based polymerizable monomer and (e) tri or more functional (meth)acrylamide-based polymerizable monomer, and at least one of the powder material and the liquid material contains (f) polymerization initiator.Type: GrantFiled: March 25, 2020Date of Patent: May 10, 2022Assignee: SHOFU INC.Inventors: Jun Uchida, Katsuya Kimoto
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Publication number: 20220015991Abstract: An object of the present invention is to provide a dental glass ionomer cement composition having high safety to a human body and sufficient working time, in which mechanical properties, mixing ability in hand mixing and dischargeability out of a container after mechanical kneading are simultaneously improved with satisfactory balance compared with the prior art. Disclosed is a dental glass ionomer cement composition including 0.001 to 3% by weight of (a) a polysaccharide nanofiber having an aspect ratio of 100 or more and an average fiber diameter of 100 nm or less.Type: ApplicationFiled: July 14, 2021Publication date: January 20, 2022Applicant: KABUSHIKI KAISHA SHOFUInventors: Shun SHIMOSOYAMA, Shuji SAKAMOTO, Katsuya KIMOTO
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Publication number: 20210212906Abstract: To provide a dental glass ionomer cement composition which exhibits high mechanical properties. The dental glass ionomer cement composition of the present disclosure comprises (a) non-crosslinked polyalkenoic acid, (b) water, (c) crosslinked polyalkenoic acid: 0.01 to 10 wt. %, and (d) acid-reactive glass powder.Type: ApplicationFiled: September 25, 2020Publication date: July 15, 2021Applicant: SHOFU INC.Inventors: Shuji SAKAMOTO, Shun SHIMOSOYAMA, Katsuya KIMOTO
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Patent number: 11000453Abstract: To provide an organic-inorganic composite filler containing; a polymerizable monomer (a) having at least one functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerizable monomer (b) having no functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerization initiator (c), an inorganic filler (d), and a silane compound (e) which generates —OH group by hydrolysis.Type: GrantFiled: February 17, 2017Date of Patent: May 11, 2021Assignee: SHOFU INC.Inventors: Katsuya Kimoto, Shunsuke Miyata, Hideto Kasaba
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Patent number: 10987283Abstract: To provide a glass ionomer cement having excellent removality of the excess cement after setting because of having shape retaining property where a kneaded material does not drip and flow by their own weights, few risk of water sensitivity and excellent operability at the bonding such that excess cement can be removed easily after an application in an oral cavity in an early timing in spite of exhibiting a thin film thickness at the bonding. A dental glass ionomer cement composition for luting comprises at least; a component (a) acid reactive glass powder having an average particle diameter within a range of 4.5 to 7.0 ?m, a component (b) polymer of an acid group-containing polymerizable monomer having a weight average molecular weight within a range of 30000 to 100000, a component (c) chelating agent and a component (d) water, wherein a plastic flow distance of a kneaded material before setting is 2 mm or less, and a removal possible time of an excess cement is 2 minutes or less.Type: GrantFiled: March 19, 2019Date of Patent: April 27, 2021Assignee: SHOFU INC.Inventors: Shun Shimosoyama, Katsuya Kimoto
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Publication number: 20210000699Abstract: An object of the present invention is to provide a dental resin-reinforced glass ionomer cement composition which exhibit high surface curability even under wet conditions, which makes it difficult for the surface to become cloudy even if moisture comes in contact with at the initial stage of curing, exhibits high mechanical properties, low water absorption expansion and excellent coloring resistance in the set product and is also excellent in storage stability. The dental resin-reinforced glass ionomer cement composition consisting of a powder material and a liquid material, wherein the powder material contains (a) acid-reactive glass powder, the liquid material contains (b) water, (c) polymer of acidic group-containing polymerizable monomer, (d) hydroxyl group-containing (meth)acrylate-based polymerizable monomer and (e) tri or more functional (meth)acrylamide-based polymerizable monomer, and at least one of the powder material and the liquid material contains (f) polymerization initiator.Type: ApplicationFiled: March 25, 2020Publication date: January 7, 2021Applicant: SHOFU INC.Inventors: Jun UCHIDA, Katsuya KIMOTO
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Publication number: 20190380919Abstract: To provide a glass ionomer cement having excellent removality of the surplus cement after curing because of having shape retaining property where a kneaded material does not drip and flow by their own weights, few risk of water sensitivity and excellent operability at the bonding such that surplus cement can be removed easily after an application in an oral cavity in an early timing in spite of exhibiting a thin coating thickness at the bonding. A glass ionomer cement composition for dental luting comprises at least; a component (a) acid reactive glass powder having an average particle diameter within a range of 4.5 to 7.0 ?m, a component (b) polymer of an acid group-containing polymerizable monomer having a weight average molecular weight within a range of 30000 to 100000, a component (c) chelating agent and a component (d) water, wherein a plastic flow distance of a kneaded material before curing is 2 mm or less, and a removal possible time of a surplus cement is 2 minutes or less.Type: ApplicationFiled: March 19, 2019Publication date: December 19, 2019Applicant: SHOFU INC.Inventors: Shun SHIMOSOYAMA, Katsuya KIMOTO
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Patent number: 10463581Abstract: To provide a sealer composition for root canal filling consisting of a liquid material containing a polymer (a) of an acid group-containing polymerizable monomer in which a portion or the entirety of the acidic group in a molecule forms a salt with an alkaline metal and water (b), wherein the pH of the liquid material is in the range from 3.5 to 5.5, and a powder material containing an acid reactive inorganic powder (c), wherein, a cured product of a kneaded material of the liquid material and the powder material comprises 3 to 20 part by weight of the polymer (a), 10 to 60 part by weight of the water (b), and 30 to 85 part by weight of the acid reactive inorganic powder (c).Type: GrantFiled: February 14, 2017Date of Patent: November 5, 2019Assignee: SHOFU INC.Inventors: Shuji Sakamoto, Katsuya Kimoto, Toshiyuki Nakatsuka
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Patent number: 10307344Abstract: To provide a two-paste type sealer composition for root canal filling consisting of a first paste containing a polymer (a) of an acid group-containing polymerizable monomer in which a portion or the entirety of the acidic group in a molecule forms a salt with an alkaline metal, a non-acid reactive powder (b) and water (c), wherein the pH of the first paste is in the range from 3.5 to 5.5, and a second paste containing an acid reactive inorganic powder (d), water (c) and a thickener (e), wherein, a cured product of a kneaded material of the first paste and the second paste comprises 3 to 20 part by weight of the polymer (a), 15 to 60 part by weight of the water (c), and 30 to 70 part by weight of the acid reactive inorganic powder (d).Type: GrantFiled: February 14, 2017Date of Patent: June 4, 2019Assignee: SHOFU INC.Inventors: Shuji Sakamoto, Katsuya Kimoto, Toshiyuki Nakatsuka
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Publication number: 20170231872Abstract: To provide an organic-inorganic composite filler containing; a polymerizable monomer (a) having at least one functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerizable monomer (b) having no functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerization initiator (c), an inorganic filler (d), and a silane compound (e) which generates —OH group by hydrolysis.Type: ApplicationFiled: February 17, 2017Publication date: August 17, 2017Applicant: SHOFU INC.Inventors: Katsuya KIMOTO, Shunsuke MIYATA, Hideto KASABA
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Publication number: 20170231874Abstract: To provide a sealer composition for root canal filling consisting of a liquid material containing a polymer (a) of an acid group-containing polymerizable monomer in which a portion or the entirety of the acidic group in a molecule forms a salt with an alkaline metal and water (b), wherein the pH of the liquid material is in the range from 3.5 to 5.5, and a powder material containing an acid reactive inorganic powder (c), wherein, a cured product of a kneaded material of the liquid material and the powder material comprises 3 to 20 part by weight of the polymer (a), 10 to 60 part by weight of the water (b), and 30 to 85 part by weight of the acid reactive inorganic powder (c).Type: ApplicationFiled: February 14, 2017Publication date: August 17, 2017Applicant: SHOFU INC.Inventors: Shuji SAKAMOTO, Katsuya KIMOTO, Toshiyuki NAKATSUKA
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Publication number: 20170231873Abstract: To provide a two-paste type sealer composition for root canal filling consisting of a first paste containing a polymer (a) of an acid group-containing polymerizable monomer in which a portion or the entirety of the acidic group in a molecule forms a salt with an alkaline metal, a non-acid reactive powder (b) and water (c), wherein the pH of the first paste is in the range from 3.5 to 5.5, and a second paste containing an acid reactive inorganic powder (d), water (c) and a thickener (e), wherein, a cured product of a kneaded material of the first paste and the second paste comprises 3 to 20 part by weight of the polymer (a), 15 to 60 part by weight of the water (c), and 30 to 70 part by weight of the acid reactive inorganic powder (d).Type: ApplicationFiled: February 14, 2017Publication date: August 17, 2017Applicant: SHOFU INC.Inventors: Shuji SAKAMOTO, Katsuya KIMOTO, Toshiyuki NAKATSUKA
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Patent number: 9526677Abstract: The present invention relates to a dental curing composition to restore a lost portion of a tooth generated due to dental caries, tooth fracturing, etc. The dental curing composition has packability suitable for restoring a posterior tooth; has a paste character of avoiding stickiness to a filling instrument; has excellent shaping properties; has very little paste character over time; and has a low polymerization shrinkage property. The dental curing composition comprises: (a) a matrix resin whose viscosity at 25° C. is 10,000 to 17,000 mPa·s, (b) an organic-inorganic composite filler, (c) an inorganic filler, and (d) a polymeric initiator.Type: GrantFiled: July 28, 2015Date of Patent: December 27, 2016Assignee: KABUSHIKI KAISHA SHOFUInventors: Yuji Sadakane, Hideto Kasaba, Shunsuke Miyata, Katsuya Kimoto, Toshiyuki Nakatsuka
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Patent number: 9393082Abstract: A viscous material container that makes it unlikely that air remains in a housing when a piston is inserted from an insertion port of the housing. A first section of the housing is formed with two groove portions communicating with a first passage to discharge air in the first passage when a piston is inserted from an insertion port. The two groove portions communicate with the insertion port, and extend along a first imaginary center line.Type: GrantFiled: March 25, 2014Date of Patent: July 19, 2016Assignee: SHOFU, INC.Inventors: Tsukasa Sasaki, Ryouji Takei, Toshiyuki Nakatsuka, Katsuya Kimoto, Hideto Kasaba
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Patent number: 9345555Abstract: Provided herein is a viscous material container that is not likely to form continuous streaks or asperities on the surface of a viscous material discharged from the viscous material container even if the viscous material is highly viscous. A third section of a housing includes a wall having a wall portion that is positioned radially outwardly of a continuous angular portion with respect to a second imaginary center line, and extends along the continuous angular portion. The wall portion is configured to expand radially outward when a dental viscous material pushed out from a discharge port.Type: GrantFiled: March 25, 2014Date of Patent: May 24, 2016Assignee: SHOFU INC.Inventors: Tsukasa Sasaki, Ryouji Takei, Toshiyuki Nakatsuka, Katsuya Kimoto, Hideto Kasaba
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Publication number: 20160030299Abstract: The present invention relates to a dental curing composition to restore a lost portion of a tooth generated due to dental caries, tooth fracturing, etc. PROBLEM To provide a dental curing composition that has packability suitable for restoring a posterior tooth, that has a paste character of avoiding stickiness to a filling instrument, that is excellent in the form shaping property, whose paste character varies little over time, and that has a low polymerization shrinkage property. SOLUTION The problem is solved by a dental curing composition that includes components (a) to (d): (a) a matrix resin whose viscosity at 25° C. is 10,000 to 17,000 mPa·s, (b) an organic-inorganic composite filler, (c) an inorganic filler, and (d) a polymeric initiator.Type: ApplicationFiled: July 28, 2015Publication date: February 4, 2016Inventors: Yuji SADAKANE, Hideto KASABA, Shunsuke MIYATA, Katsuya KIMOTO, Toshiyuki NAKATSUKA