Patents by Inventor Kenji Hatanaka
Kenji Hatanaka 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).
-
Patent number: 11707346Abstract: The present invention provides a dental mill blank that exhibits desirable resistance against wear in opposing teeth. The present invention relates to a dental mill blank comprising: an inorganic filler containing an inorganic filler (A) and an inorganic filler (B); and a polymer, the inorganic filler (A) partly forming an aggregate, and the dental mill blank satisfying the following formulae (I) to (III), 0.001?a<0.32??(I) 0.3?b?10??(II) 5?x?80??(III), where a is an average primary particle diameter of the inorganic filler (A) in micrometers, b is an average primary particle diameter of the inorganic filler (B) in micrometers, and x is an average particle diameter of the aggregate in micrometers. Preferably, the dental mill blank comprises an island component containing the aggregate, and a sea component containing the inorganic filler (A) and the inorganic filler (B).Type: GrantFiled: December 26, 2018Date of Patent: July 25, 2023Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Masashi Inoue, Kenji Hatanaka
-
Patent number: 11400030Abstract: The present invention provides a two-paste dental curable composition achieving clinically acceptable bond durability to dental adherends including dental glass ceramic restorations (particularly lithium disilicate-containing glass ceramic restorations) without using conventionally used primers. The present invention relates to a two-paste dental curable composition comprising: a first agent comprising a polymerizable monomer (a) having an acid group, a polymerizable monomer (b) having no acid group, a polymerization initiator (c), and a filler (d); and a second agent comprising a polymerizable monomer (b) having no acid group, at least one filler (e) selected from the group consisting of a basic glass filler and alumina, a polymerization accelerator (f), and a silane coupling agent (g) represented by the following general formula [I]: (The definitions of the symbols are omitted.Type: GrantFiled: June 28, 2018Date of Patent: August 2, 2022Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Mariko Kawana, Kenji Hatanaka, Momoe Abe
-
Patent number: 10987281Abstract: The present invention provides a self-adhesive dental composite resin maintaining mechanical strength, showing excellent storage stability, undergoing little change in transparency and properties of the paste during long-term storage, and having a small solidification risk during long-term storage. The present invention relates to a self-adhesive dental composite resin comprising: an acid group-containing (meth)acrylic polymerizable monomer (a); a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group; a photopolymerization initiator (c); and a filler (d), wherein the filler (d) is treated with a surface treatment agent and has an average particle diameter of 0.01 to 50.0 ?m, the surface treatment agent comprises a silane coupling agent (A) represented by the following general formula (1): CH2?C(R1)—COO—(CH2)p—Si—R2qR3(3-q)??(1), and an organosilazane (B) represented by the following general formula (2): R4R5R6—Si—NH—Si—R7R8R9??(2).Type: GrantFiled: October 20, 2017Date of Patent: April 27, 2021Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Shumei Ishihara, Yamato Nojiri, Mitsuru Takei, Kenji Hatanaka
-
Publication number: 20200360120Abstract: The present invention provides a dental mill blank that exhibits desirable resistance against wear in opposing teeth. The present invention relates to a dental mill blank comprising: an inorganic filler containing an inorganic filler (A) and an inorganic filler (B); and a polymer, the inorganic filler (A) partly forming an aggregate, and the dental mill blank satisfying the following formulae (I) to (III), 0.001?a<0.32??(I) 0.3?b?10??(II) 5?x?80??(III), where a is an average primary particle diameter of the inorganic filler (A) in micrometers, b is an average primary particle diameter of the inorganic filler (B) in micrometers, and x is an average particle diameter of the aggregate in micrometers. Preferably, the dental mill blank comprises an island component containing the aggregate, and a sea component containing the inorganic filler (A) and the inorganic filler (B).Type: ApplicationFiled: December 26, 2018Publication date: November 19, 2020Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Masashi INOUE, Kenji HATANAKA
-
Publication number: 20200179237Abstract: The present invention provides a self-adhesive dental composite resin maintaining mechanical strength, showing excellent storage stability, undergoing little change in transparency and properties of the paste during long-term storage, and having a small solidification risk during long-term storage. The present invention relates to a self-adhesive dental composite resin comprising: an acid group-containing (meth)acrylic polymerizable monomer (a); a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group; a photopolymerization initiator (c); and a filler (d), wherein the filler (d) is treated with a surface treatment agent and has an average particle diameter of 0.01 to 50.0 ?m, the surface treatment agent comprises a silane coupling agent (A) represented by the following general formula (1): CH2?C(R1)—COO—(CH2)p—Si—R2qR3(3-q)??(1), and an organosilazane (B) represented by the following general formula (2): R4R5R6—Si—NH—Si—R7R8R9??(2).Type: ApplicationFiled: October 20, 2017Publication date: June 11, 2020Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Shumei ISHIHARA, Yamato NOJIRI, Mitsuru TAKEI, Kenji HATANAKA
-
Publication number: 20200155421Abstract: The present invention provides a two-paste dental curable composition achieving clinically acceptable bond durability to dental adherends including dental glass ceramic restorations (particularly lithium disilicate-containing glass ceramic restorations) without using conventionally used primers. The present invention relates to a two-paste dental curable composition comprising: a first agent comprising a polymerizable monomer (a) having an acid group, a polymerizable monomer (b) having no acid group, a polymerization initiator (c), and a filler (d); and a second agent comprising a polymerizable monomer (b) having no acid group, at least one filler (e) selected from the group consisting of a basic glass filler and alumina, a polymerization accelerator (f), and a silane coupling agent (g) represented by the following general formula [I]: (The definitions of the symbols are omitted.Type: ApplicationFiled: June 28, 2018Publication date: May 21, 2020Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Mariko KAWANA, Kenji HATANAKA, Momoe ABE
-
Patent number: 10603250Abstract: The present invention provides a dentinal tubule occlusion material excellent in terms of initial degree of dentinal tubule occlusion, resistance of dentinal tubule occlusion to acids, handling properties, and storage stability. The present invention relates to an one-pack type dentinal tubule occlusion material comprising fluorapatite particles (A) having an average particle diameter of 0.6 to 10 ?m, inorganic particles (B) having an average particle diameter of 0.6 to 10 ?m and reactive with water to form apatite, and a non-aqueous dispersant (C).Type: GrantFiled: October 29, 2015Date of Patent: March 31, 2020Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Kenji Hatanaka, Shumei Ishihara
-
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
-
Patent number: 9962319Abstract: A dentinal tubule sealant including apatite particles (A) having an average particle diameter of 500 nm or less, a filler (B) having an average particle diameter of 1 to 10 ?m, and a dispersant (C), wherein the weight ratio (A/B) of the apatite particles (A) to the filler (B) is 0.05 to 15, the dentinal tubule sealant contains 15 to 95 parts by weight of the dispersant (C) relative to 100 parts by weight in total of the apatite particles (A) and the filler (B), and the total amount of the apatite particles (A), the filler (B), and the dispersant (C) is 85 parts by weight or more relative to 100 parts by weight of the dentinal tubule sealant. There is thereby provided a dentinal tubule sealant excelling in dentinal tubule sealability immediately after treatment, durability of dentinal tubule sealing, ease of operation, and storage stability.Type: GrantFiled: September 29, 2014Date of Patent: May 8, 2018Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Shumei Ishihara, Kenji Hatanaka
-
Patent number: 9827268Abstract: The present invention provides a curable calcium phosphate composition for biological hard tissue repair that yields a cured product excellent in durability in a wet environment such as in a body or an oral cavity. The present invention relates to a curable calcium phosphate composition for biological hard tissue repair, including tetracalcium phosphate particles (A), calcium hydrogen phosphate particles (B), calcium carbonate particles (C), and water (D), the curable calcium phosphate composition including 5 to 75 parts by weight of the tetracalcium phosphate particles (A), 10 to 70 parts by weight of the calcium hydrogen phosphate particles (B), and 2 to 50 parts by weight of the calcium carbonate particles (C) per 100 parts by weight of the total of the tetracalcium phosphate particles (A), the calcium hydrogen phosphate particles (B), and the calcium carbonate particles (C).Type: GrantFiled: August 4, 2014Date of Patent: November 28, 2017Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Kenji Hatanaka, Shumei Ishihara
-
Publication number: 20170333295Abstract: The present invention provides a dentinal tubule occlusion material excellent in terms of initial degree of dentinal tubule occlusion, resistance of dentinal tubule occlusion to acids, handling properties, and storage stability. The present invention relates to an one-pack type dentinal tubule occlusion material comprising fluorapatite particles (A) having an average particle diameter of 0.6 to 10 ?m, inorganic particles (B) having an average particle diameter of 0.6 to 10 ?m and reactive with water to form apatite, and a non-aqueous dispersant (C).Type: ApplicationFiled: October 29, 2015Publication date: November 23, 2017Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Kenji HATANAKA, Shumei ISHIHARA
-
Patent number: 9526675Abstract: The present invention provides a dentinal tubule sealing material excellent in durability of dentinal tubule sealing performance (acid resistance) and also in storage stability. The present invention relates to a dentinal tubule sealing material including tetracalcium phosphate particles (A), calcium hydrogen phosphate particles (B), calcium carbonate particles (C), and a non-aqueous dispersant (D), the dentinal tubule sealing material including 5 to 75 parts by weight of the tetracalcium phosphate particles (A), 10 to 70 parts by weight of the calcium hydrogen phosphate particles (B), and 2 to 50 parts by weight of the calcium carbonate particles (C) per 100 parts by weight of the total of the tetracalcium phosphate particles (A), the calcium hydrogen phosphate particles (B), and the calcium carbonate particles (C).Type: GrantFiled: August 4, 2014Date of Patent: December 27, 2016Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Kenji Hatanaka, Shumei Ishihara
-
Patent number: 9427381Abstract: A dental curable composition containing fluoroaluminosilicate glass particles (A), basic calcium phosphate particles (B1), acidic calcium phosphate particles (B2), a polyalkenic acid (C), tartaric acid (D), and water (E), wherein the dental curable composition contains 70 to 99 parts by weight of (A), 1 to 30 parts by weight in total of (B1) and (B2), 10 to 40 parts by weight of (C), 0.3 to 10 parts by weight of (D), and 10 to 90 parts by weight of (E) each relative to 100 parts by weight in total of (A), (B1), and (B2), and a Ca/P ratio of a sum of (B1) and (B2) is from 1.10 to 1.95. Accordingly, provided is a dental curable composition that is high in mechanical strength, particularly compressive strength, and excellent in remineralization capability.Type: GrantFiled: September 26, 2013Date of Patent: August 30, 2016Assignee: KURARAY NORITAKE DENTAL INC.Inventors: Shumei Ishihara, Kenji Hatanaka
-
Publication number: 20160228336Abstract: A dentinal tubule sealant including apatite particles (A) having an average particle diameter of 500 nm or less, a filler (B) having an average particle diameter of 1 to 10 ?m, and a dispersant (C), wherein the weight ratio (A/B) of the apatite particles (A) to the filler (B) is 0.05 to 15, the dentinal tubule sealant contains 15 to 95 parts by weight of the dispersant (C) relative to 100 parts by weight in total of the apatite particles (A) and the filler (B), and the total amount of the apatite particles (A), the filler (B), and the dispersant (C) is 85 parts by weight or more relative to 100 parts by weight of the dentinal tubule sealant. There is thereby provided a dentinal tubule sealant excelling in dentinal tubule sealability immediately after treatment, durability of dentinal tubule sealing, ease of operation, and storage stability.Type: ApplicationFiled: September 29, 2014Publication date: August 11, 2016Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Shumei ISHIHARA, Kenji HATANAKA
-
Publication number: 20160193118Abstract: The present invention provides a dentinal tubule sealing material excellent in durability of dentinal tubule sealing performance (acid resistance) and also in storage stability. The present invention relates to a dentinal tubule sealing material including tetracalcium phosphate particles (A), calcium hydrogen phosphate particles (B), calcium carbonate particles (C), and a non-aqueous dispersant (D), the dentinal tubule sealing material including 5 to 75 parts by weight of the tetracalcium phosphate particles (A), 10 to 70 parts by weight of the calcium hydrogen phosphate particles (B), and 2 to 50 parts by weight of the calcium carbonate particles (C) per 100 parts by weight of the total of the tetracalcium phosphate particles (A), the calcium hydrogen phosphate particles (B), and the calcium carbonate particles (C).Type: ApplicationFiled: August 4, 2014Publication date: July 7, 2016Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Kenji HATANAKA, Shumei ISHIHARA
-
Publication number: 20160175355Abstract: The present invention provides a curable calcium phosphate composition for biological hard tissue repair that yields a cured product excellent in durability in a wet environment such as in a body or an oral cavity. The present invention relates to a curable calcium phosphate composition for biological hard tissue repair, including tetracalcium phosphate particles (A), calcium hydrogen phosphate particles (B), calcium carbonate particles (C), and water (D), the curable calcium phosphate composition including 5 to 75 parts by weight of the tetracalcium phosphate particles (A), 10 to 70 parts by weight of the calcium hydrogen phosphate particles (B), and 2 to 50 parts by weight of the calcium carbonate particles (C) per 100 parts by weight of the total of the tetracalcium phosphate particles (A), the calcium hydrogen phosphate particles (B), and the calcium carbonate particles (C).Type: ApplicationFiled: August 4, 2014Publication date: June 23, 2016Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Kenji HATANAKA, Shumei ISHIHARA
-
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
-
Publication number: 20150202123Abstract: A dental curable composition containing fluoroaluminosilicate glass particles (A), basic calcium phosphate particles (B1), acidic calcium phosphate particles (B2), a polyalkenic acid (C), tartaric acid (D), and water (E), wherein the dental curable composition contains 70 to 99 parts by weight of (A), 1 to 30 parts by weight in total of (B1) and (B2), 10 to 40 parts by weight of (C), 0.3 to 10 parts by weight of (D), and 10 to 90 parts by weight of (E) each relative to 100 parts by weight in total of (A), (B1), and (B2), and a Ca/P ratio of a sum of (B1) and (B2) is from 1.10 to 1.95. Accordingly, provided is a dental curable composition that is high in mechanical strength, particularly compressive strength, and excellent in remineralization capability.Type: ApplicationFiled: September 26, 2013Publication date: July 23, 2015Applicant: KURARAY NORITAKE DENTAL INC.Inventors: Shumei Ishihara, Kenji Hatanaka
-
Publication number: 20070277304Abstract: A bathing apparatus for thermotherapy includes a bathtub provided with sensors for measuring a water temperature in the bathtub and for measuring the body temperature of a bather. A water supply/heating device adjusts the temperature of water by heating the water in a boiler based on the difference in temperatures measured by the sensors and circulates the water through a circulating passage leading to the bathtub. An oxidation-reduction potential reducing unit is provided in the circulating passage. It includes a container through which water in the circulating passage passes, and vitreous inorganic particles stored in the container for reducing the oxidation-reduction potential of water in the circulating passage when brought into contact with the water in the circulating passage.Type: ApplicationFiled: September 27, 2006Publication date: December 6, 2007Inventors: Kenichi Horinoue, Kenji Hatanaka
-
Patent number: 6500902Abstract: A fitting composition capable of fitting a body-worn tool to be used in contact with skin, such as spectacles, a hearing aid, and an artificial limb, suitably to the body shape of individual wearer and thereby realizing the function of the body-worn tool in a steady state, as well as providing an excellent wear-feeling, a body-worn tool produced using the same, and a method of producing the same. The fitting composition for body-worn tools to be used in contact with skin including (a) a thermoplastic block copolymer having at least one polymer block (A) mainly composed of an aromatic vinyl compound and at least one elastic polymer block (B); (b) a (meth)acrylic monomer; and (c) a polymerization initiator.Type: GrantFiled: June 21, 2001Date of Patent: December 31, 2002Assignees: Kuraray Co., Ltd., Japan Institute of Advanced DentistryInventors: Satoshi Yamaguchi, Junichi Yamauchi, Kenji Hatanaka, Mizuho Maeda, Eiichi Masuhara