Patents by Inventor Takuma Matsuo

Takuma Matsuo 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).

  • Publication number: 20240127982
    Abstract: An information processing apparatus includes a converting portion having a plurality of electrical conductors to be arranged in mutual separation and a medium arranged so as to mutually connect the plurality of electrical conductors, wherein the converting portion is the information processing apparatus to convert an input signal to an output signal. The medium includes the electrolyte and is configured to be capable of controlling an electrical conductivity of an electrically conductive path mutually electrically connecting the plurality of electrical conductors, and the medium is selected such that the electrical conductivity of the electrically conductive path changes over time with the input signal not being present.
    Type: Application
    Filed: January 27, 2022
    Publication date: April 18, 2024
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, TOKYO UNIVERSITY OF SCIENCE FOUNDATION, TOYOTA PHYSICAL AND CHEMICAL RESEARCH INSTITUTE, NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, NAGASE & CO., LTD.
    Inventors: Hiroyuki AKINAGA, Hisashi SHIMA, Yasuhisa NAITOH, Hiroshi SATOU, Dan SATOU, Takuma MATSUO, Kentaro KINOSHITA, Toshiyuki ITOH, Toshiki NOKAMI, Masakazu KOBAYASHI
  • Patent number: 11958970
    Abstract: A resin block suitable for dental cutting work may include a resin matrix (A) and spherical filler (B) whose average particle size ranges from 230 to 1000 nm. When 10 mm thick and measured with a colorimeter, the lightness (V) is less than 5.0 and the saturation (C) is less than 2.0 in a Munsell color system of colored light on a black background and a white background. When 1 mm thick, the lightness (V) is less than 5.0 and the saturation (C) is 0.05 or more on a black background, but on a white background, the lightness (V) is 6.0 or more and the saturation (C) is less than 2.0 for Munsell colored light. Resin blocks can be used for dental restoration such that dental prostheses produced from the block not using a pigment/dye are compatible with natural teeth color tone, and the color tone compatibility endures.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: April 16, 2024
    Assignee: Tokuyama Dental Corporation
    Inventors: Takuma Matsuo, Hironobu Akizumi
  • Publication number: 20230039514
    Abstract: Provided is a curable composition that is for dentistry and that contains: a polymerizable monomer (A); an inorganic filler (B) having an average particle size of 0.1-1 ?m; an organic-inorganic composite filler (C) having an aggregate structure in which inorganic primary particles having an average particle size of 10-1000 nm are bonded together through a resin layer covering the surface of the particles, to form a void having a specific pore volume; and a polymerization initiator (D). In the organic-inorganic composite filler (C), a curved surface-shaped organic-inorganic composite filler (C1) formed of organic-inorganic composite aggregate particles having a curved surface shape, and an amorphous organic-inorganic composite filler (C2) formed of amorphous organic-inorganic composite aggregate particles having an edge portion, are mixed such that C1/(C1+C2) equals 0.2-0.8 in terms of the number of particles having a particle size of 5 ?m or more.
    Type: Application
    Filed: November 26, 2020
    Publication date: February 9, 2023
    Applicant: TOKUYAMA DENTAL CORPORATION
    Inventors: Hiroshi Morisaki, Tatsuya Yamazaki, Takuma Matsuo, Hironobu Akizumi
  • Publication number: 20230045524
    Abstract: Provided is a dental filling and repairing material kit that is for repairing a tooth having a cavity and that includes a first polymerization curable composition (A) for forming a surface exposed layer exposed to a surface after repairing and a second polymerization curable composition (B) for forming a foundation layer to serve as a foundation of the surface exposed layer. The first polymerization curable composition (A) is formed into a cured body that expresses a structure color by dispersion of inorganic spherical particles in a specific dispersion state in a matrix. Regarding the second polymerization curable composition (B), the brightness (V) of colored light when a sample of said composition with a thickness of 1 mm is measured by using a color difference meter under a black background, is not less than 5 in terms of a color measurement value in the Munsell color system.
    Type: Application
    Filed: November 27, 2020
    Publication date: February 9, 2023
    Applicant: TOKUYAMA DENTAL CORPORATION
    Inventors: Hironobu Akizumi, Hiroshi Morisaki, Takuma Matsuo
  • Patent number: 11453761
    Abstract: Provided is a composite material which comprises a resin matrix and inorganic particles dispersed therein, wherein the inorganic particles comprise: one or more groups (G-PID) of spherical particles uniform in particle diameter which comprise aggregates of inorganic spherical particles having a specific average primary-particle diameter, have a narrow particle-size-distribution width, and have a lower refractive index than the resin matrix; and a group (G-SFP) of ultrafine particles. The inorganic spherical particles which constitute all the groups of spherical particles uniform in particle diameter contained in the resin matrix have an arrangement structure which is a short-range order structure satisfying a specific requirement. Also provided are a curable composition giving the composite material and a method for producing the curable composition.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: September 27, 2022
    Assignee: TOKUYAMA DENTAL CORPORATION
    Inventors: Takuma Matsuo, Hiroshi Morisaki, Hironobu Akizumi
  • Publication number: 20220218450
    Abstract: Provided are a blank for dental cutting having a part to be cut made from a resin material, wherein the resin material includes a composite material in which inorganic particles are dispersed in a resin matrix, the inorganic particles are made from aggregates of inorganic spherical particles having a specific average primary particle diameter, have a narrow particle size distribution, and include one or a plurality of spherical particle groups of the same particle diameter (G-PID) having a refractive index smaller than that of the resin matrix and an ultrafine particle group (G-SFP), and the arrangement structure of all of the inorganic spherical particles constituting the spherical particle groups of the same particle diameter in the resin matrix has a short-range ordered structure that fulfills specific conditions, and a method for producing the same.
    Type: Application
    Filed: May 13, 2020
    Publication date: July 14, 2022
    Applicant: TOKUYAMA DENTAL CORPORATION
    Inventors: Takuma Matsuo, Anna Soshi, Yuukou Nagasawa, Hironobu Akizumi
  • Publication number: 20210324178
    Abstract: Provided is a composite material which comprises a resin matrix and inorganic particles dispersed therein, wherein the inorganic particles comprise: one or more groups (G-PID) of spherical particles uniform in particle diameter which comprise aggregates of inorganic spherical particles having a specific average primary-particle diameter, have a narrow particle-size-distribution width, and have a lower refractive index than the resin matrix; and a group (G-SFP) of ultrafine particles. The inorganic spherical particles which constitute all the groups of spherical particles uniform in particle diameter contained in the resin matrix have an arrangement structure which is a short-range order structure satisfying a specific requirement. Also provided are a curable composition giving the composite material and a method for producing the curable composition.
    Type: Application
    Filed: August 29, 2019
    Publication date: October 21, 2021
    Applicant: TOKUYAMA DENTAL CORPORATION
    Inventors: Takuma Matsuo, Hiroshi Morisaki, Hironobu Akizumi
  • Patent number: 11078303
    Abstract: Provided is a curable composition containing a polymerizable monomer (A), an organic-inorganic composite filler (B), and a polymerization initiator (C), wherein the organic-inorganic composite filler (B) includes an organic resin matrix (b1) and a spherical inorganic filler (b2) having an average primary particle size of 230-1000 nm, 90% or more of the number of individual particles constituting the spherical inorganic filler (b2) are present in a range of 5% greater or less than the average primary particle size, and the curable composition satisfies the following formulas (1) and (2): nP<nFb2??(formula 1) and nMb1<nFb2??(formula 2) In the formulas, nP represents the refractive index of the polymer of the polymerizable monomer (A) at 25° C., nFb2 represents the refractive index of the spherical inorganic filler (b2) at 25° C., and nMb1 represents the refractive index of the organic resin matrix (b1) at 25° C.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: August 3, 2021
    Assignee: TOKUYAMA DENTAL CORPORATION
    Inventors: Hironobu Akizumi, Takuma Matsuo
  • Patent number: 11065183
    Abstract: Provided is a curable composition comprising a polymerizable monomer (A); spherical particles (B) having an average primary-particle diameter in a range of 230 nm to 1,000 nm; and a polymerization initiator (C), in which 90% or more of individual particles constituting the spherical particles (B) lies in a range of ±5% based on the average primary-particle diameter, and the refractive index of the spherical particles (B) is larger than the refractive index of a polymer of the polymerizable monomer (A). When a 1 mm-thick cured product is formed from the curable composition and the Y value (Yb) of the colored light of the cured product on a black background and the Y value (Yw) of the colored light of the cured product on a white background are each measured using a color difference meter, the ratio therebetween, Yb/Yw, being within a range of 0.2 to 0.5.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: July 20, 2021
    Assignee: TOKUYAMA DENTAL CORPORATION
    Inventors: Takuma Matsuo, Hironobu Akizumi
  • Publication number: 20210095113
    Abstract: A resin block suitable for dental cutting work may include a resin matrix (A) and spherical filler (B) whose average particle size ranges from 230 to 1000 nm. When 10 mm thick and measured with a colorimeter, the lightness (V) is less than 5.0 and the saturation (C) is less than 2.0 in a Munsell color system of colored light on a black background and a white background. When 1 mm thick, the lightness (V) is less than 5.0 and the saturation (C) is 0.05 or more on a black background, but on a white background, the lightness (V) is 6.0 or more and the saturation (C) is less than 2.0 for Munsell colored light. Resin blocks can be used for dental restoration such that dental prostheses produced from the block not using a pigment/dye are compatible with natural teeth color tone, and the color tone compatibility endures.
    Type: Application
    Filed: March 28, 2019
    Publication date: April 1, 2021
    Applicant: Tokuyama Dental Corporation
    Inventors: Takuma MATSUO, Hironobu AKIZUMI
  • Patent number: 10653586
    Abstract: To provide a cured product having high fracture energy, provided are a curable composition, including: organic-inorganic composite particles; (a polymerizable monomer; a polymerization initiator; and inorganic particles, in which a cured body formed by curing the curable composition includes: a matrix formed by curing all constituent components of the curable composition except for the organic-inorganic composite particles; and the organic-inorganic composite particles dispersed and contained in the cured body, and in which an elastic modulus M of the matrix is larger than an elastic modulus P of the organic-inorganic composite particles by 3.0 GPa or more, a curable composition for dental use, and an organic-inorganic composite particle for dental use.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: May 19, 2020
    Assignee: TOKUYAMA DENTAL COOPERATION
    Inventors: Junichiro Yamagawa, Tatsuya Yamazaki, Takuma Matsuo, Takuya Suzuki
  • Publication number: 20200121564
    Abstract: Provided is a curable composition comprising a polymerizable monomer (A); spherical particles (B) having an average primary-particle diameter in a range of 230 nm to 1,000 nm; and a polymerization initiator (C), in which 90% or more of individual particles constituting the spherical particles (B) lies in a range of ±5% based on the average primary-particle diameter, and the refractive index of the spherical particles (B) is larger than the refractive index of a polymer of the polymerizable monomer (A). When a 1 mm-thick cured product is formed from the curable composition and the Y value (Yb) of the colored light of the cured product on a black background and the Y value (Yw) of the colored light of the cured product on a white background are each measured using a color difference meter, the ratio therebetween, Yb/Yw, being within a range of 0.2 to 0.5.
    Type: Application
    Filed: April 16, 2018
    Publication date: April 23, 2020
    Applicant: TOKUYAMA DENTAL CORPORATION
    Inventors: Takuma Matsuo, Hironobu Akizumi
  • Publication number: 20190292278
    Abstract: Provided is a curable composition containing a polymerizable monomer (A), an organic-inorganic composite filler (B), and a polymerization initiator (C), wherein the organic-inorganic composite filler (B) includes an organic resin matrix (b1) and a spherical inorganic filler (b2) having an average primary particle size of 230-1000 nm, 90% or more of the number of individual particles constituting the spherical inorganic filler (b2) are present in a range of 5% greater or less than the average primary particle size, and the curable composition satisfies the following formulas (1) and (2): nP<nFb2??(formula 1) and nMb1<nFb2??(formula 2) In the formulas, nP represents the refractive index of the polymer of the polymerizable monomer (A) at 25° C., nFb2 represents the refractive index of the spherical inorganic filler (b2) at 25° C., and nMb1 represents the refractive index of the organic resin matrix (b1) at 25° C.
    Type: Application
    Filed: November 28, 2017
    Publication date: September 26, 2019
    Applicant: TOKUYAMA DENTAL CORPORATION
    Inventors: Hironobu Akizumi, Takuma Matsuo
  • Publication number: 20190038515
    Abstract: To provide a cured product having high fracture energy, provided are a curable composition, including: organic-inorganic composite particles; (a polymerizable monomer; a polymerization initiator; and inorganic particles, in which a cured body formed by curing the curable composition includes: a matrix formed by curing all constituent components of the curable composition except for the organic-inorganic composite particles; and the organic-inorganic composite particles dispersed and contained in the cured body, and in which an elastic modulus M of the matrix is larger than an elastic modulus P of the organic-inorganic composite particles by 3.0 GPa or more, a curable composition for dental use, and an organic-inorganic composite particle for dental use.
    Type: Application
    Filed: October 27, 2016
    Publication date: February 7, 2019
    Inventors: Junichiro YAMAGAWA, Tatsuya YAMAZAKI, Takuma MATSUO, Takuya SUZUKI
  • Publication number: 20060242385
    Abstract: Disclosed is a technology of generating an instruction set architecture (hereinafter, referred to as ‘ISA’) and a series of logic circuit configuration information of a processor for executing an application program from an application program described in a high-level language. The present invention also relates to a custom LSI development platform technology which can design, develop, and manufacture the application specific custom LSI in a short time by applying the generated ISA and logic circuit configuration information to a dynamic logic circuit reconfigurable processor. Furthermore, disclosed is a dynamically reconfigurable processor, which is reconfigurable using the generated logic circuit configuration information. Associated methods are also disclosed.
    Type: Application
    Filed: November 4, 2005
    Publication date: October 26, 2006
    Inventors: Kazuaki Murakami, Makoto Shuto, Lovic Gauthier, Takuma Matsuo, Tetsuya Hasebe, Shuichi Kikuchi