Patents by Inventor Takehiro Shibuya

Takehiro Shibuya 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: 20220146607
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates a limit imaging condition based on one or more imaging parameters for determining an imaging condition, the limit imaging condition being an allowable limit relating to heat input to a superconducting magnet. The processing circuitry limits an input range of an imaging parameter input by an operator based on the limit imaging condition.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Hitoshi KANAZAWA, Seiji NOZAKI, Takehiro SHIBUYA
  • Publication number: 20220146611
    Abstract: According to one embodiment, a MRI apparatus determines a first time during which a subsidiary power supply is capable of supplying power to a cooling device based on a capacity of the subsidiary power supply when power outage of a main power supply occurs, and determines a second time needed to demagnetize a superconducting magnet based on an excitation current of the superconducting magnet and a temperature of the superconducting magnet. The MRI apparatus determines starts ramp-down of the superconducting magnet after a third time based on the first time and the second time has elapsed from initiation of power outage of the main power supply.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Kazuto NAKABAYASHI, Takehiro SHIBUYA
  • Publication number: 20220146610
    Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry is configured to calculate an allowable amount of heat input to a superconducting magnet, the allowable amount being allocated to each of a plurality of imagings scheduled during a target period. The processing circuitry is configured to determine an imaging condition based on the allowable amount in the each of the plurality of imagings.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Applicant: Canon Medical Systems Corporation
    Inventors: Hitoshi KANAZAWA, Seiji NOZAKI, Takehiro SHIBUYA
  • Publication number: 20180067181
    Abstract: A magnetic field adjusting method according to an embodiment includes: acquiring, by using a measuring device, first data related to a static magnetic field while a static magnetic field magnet is generating the static magnetic field having magnetic field intensity lower than rated magnetic field intensity required by an imaging process performed by a magnetic resonance imaging apparatus; and calculating, by using processing circuitry, a positional arrangement of a shim member used for correcting uniformity of the static magnetic field on the basis of the first data.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 8, 2018
    Applicant: Toshiba Medical Systems Corporation
    Inventors: Kazuto NOGAMI, Fumitoshi KOJIMA, Yoshitomo SAKAKURA, Hidekazu TANAKA, Takehiro SHIBUYA
  • Patent number: 8658713
    Abstract: A bone cement composition which contains titanium dioxide particles having a median diameter of 0.5 to 7.0 ?m as measured by a laser diffraction/scattering particle size distribution analyzer and a BET specific surface area of 0.5 to 7.0 m2/g as measured by a nitrogen adsorption method, and a base-forming component comprising a (meth)acrylate polymer and a (meth)acrylate monomer, wherein the content of the titanium dioxide particles is 5 to 50% by mass based on the total mass of the composition. The bone cement composition has bioactivity and is capable of forming a hardened material having a high mechanical strength.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: February 25, 2014
    Assignees: Kyoto University, Ishihara Sangyo Kaisha, Ltd.
    Inventors: Takashi Nakamura, Koji Goto, Takehiro Shibuya, Yoshimichi Ueda, Tokuo Suita, Hiroaki Nishii
  • Patent number: 8609746
    Abstract: A bone cement composition which contains large-diameter (meth)acrylate polymer particles having an average particle diameter of 10 to 60 ?m, small-diameter (meth)acrylate polymer particles having an average particle diameter of 0.1 to 2.0 ?m, a (meth)acrylate monomer and a polymerization initiator, wherein the content of the small-diameter (meth)acrylate polymer particles is 5 to 30% by mass based on the total mass of the small-diameter (meth)acrylate polymer particles and the large-diameter (meth)acrylate polymer particles, and a part or a whole of the small-diameter (meth)acrylate polymer particles are contained in the form of aggregates having an average particle diameter of 30 to 50 ?m.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: December 17, 2013
    Assignees: Kyoto University, Ishihara Sangyo Kaisha, Ltd.
    Inventors: Takashi Nakamura, Koji Goto, Takehiro Shibuya, Yoshimichi Ueda, Tokuo Suita, Masashi Imamura, Hiroaki Nishii
  • Publication number: 20120046385
    Abstract: The invention has as its objects the provision of a bone cement composition and a bone cement composition kit for obtaining the bone cement composition having bioactivity and capable of forming a hardened material having high mechanical strength practically required, and the provision of a bone cement formed material having both bioactivity and high mechanical strength practically required and a production method thereof. The bone cement composition of the invention contains titanium dioxide particles having a median diameter of 0.5 to 7.0 ?m as measured by a laser diffraction/scattering type particle size distribution analyzer and a BET specific surface area of 0.5 to 7.0 m2/g as measured by a nitrogen adsorption method, and a base-forming component comprising a (meth)acrylate polymer and a (meth)acrylate monomer, wherein the content of the titanium dioxide particles is 5 to 50% by mass based on the total mass of the composition.
    Type: Application
    Filed: February 23, 2010
    Publication date: February 23, 2012
    Inventors: Takashi Nakamura, Koji Goto, Takehiro Shibuya, Yoshimichi Ueda, Tokuo Suita, Hiroaki Nishii
  • Publication number: 20120035296
    Abstract: The invention has as its objects the provision of a bone cement composition, a bone cement composition kit for obtaining the bone cement composition, and a production method of a bone cement hardened material, which are short in doughing time that is a time required to become a state in which a good handling operation can be conducted, and have consequently capable of achieving a high working efficiency by shortening the time required before the handling operation is started. The bone cement composition of the invention contains large-diameter (meth)acrylate polymer particles having an average particle diameter of 10 to 60 ?m, small-diameter (meth)acrylate polymer particles having an average particle diameter of 0.1 to 2.0 ?m, a (meth)acrylate monomer and a polymerization initiator, wherein the content of the small-diameter (meth)acrylate polymer particles is 5 to 30% by mass based on the total mass of the small-diameter (meth)acrylate polymer particles and the large-diameter (meth)acrylate polymer particles.
    Type: Application
    Filed: February 23, 2010
    Publication date: February 9, 2012
    Inventors: Takashi Nakamura, Koji Goto, Takehiro Shibuya, Yoshimichi Ueda, Tokuo Suita, Masashi Imamura, Hiroaki Nishii
  • Patent number: 7871561
    Abstract: An artificial bone which is excellent in the ability to form bone in a living body, reliably thereof, and has high mechanical strength. The process comprises the steps of: mixing granules, composed of a titanium or a titanium alloy powder and an organic binder, with a particulate pore-forming material, pressure-molding the mixture to obtain a molded body, firing the molded body at 1200° C. to obtain a porous body, bringing the porous body into contact with an aqueous alkali solution, subsequently with water of 35° C. or higher for a period longer than that of contacting with the aqueous alkali solution and then heating the porous body at 100 to 650° C., preferably 200 to 600° C.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: January 18, 2011
    Assignee: Japan Science and Technology Agency
    Inventors: Tadashi Kokubo, Takehiro Shibuya
  • Publication number: 20090270998
    Abstract: An artificial bone which is excellent in the ability to form bone in a living body, reliably thereof, and has high mechanical strength. The process comprises the steps of: mixing granules, composed of a titanium or a titanium alloy powder and an organic binder, with a particulate pore-forming material, pressure-molding the mixture to obtain a molded body, firing the molded body at 1200° C. to obtain a porous body, bringing the porous body into contact with an aqueous alkali solution, subsequently with water of 35° C. or higher for a period longer than that of contacting with the aqueous alkali solution and then heating the porous body at 100 to 650° C., preferably 200 to 600° C.
    Type: Application
    Filed: March 22, 2006
    Publication date: October 29, 2009
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Tadashi Kokubo, Takehiro Shibuya
  • Publication number: 20060214134
    Abstract: A luminescent glass article of the present invention includes a luminescent substance dispersed uniformly in glass, in which: light transmittance is 20 to 90% at a thickness of 10 mm; and an initial luminescence intensity just after irradiation of light of 1,000 lux for 20 min is 200 to 4,000 mcd/m2.
    Type: Application
    Filed: March 31, 2004
    Publication date: September 28, 2006
    Inventors: Noriaki Masuda, Hiroshi Oshima, Takehiro Shibuya
  • Patent number: 5527836
    Abstract: A bioactive cement comprises a filler consisting of nonalkali glass powder containing Ca, monomer containing hydrophilic dimethacrylate, a polymerization starter, and a polymerization promotor. The nonalkali glass powder containing Ca comprises a composition by weight of 40-50% CaO, 30-40% SiO.sub.2, 10-20% P.sub.2 O.sub.5, 0-10% MgO, and 0-2% CaF.sub.2. The hydrophilic dimethacrylate is 2,2-bis[4-(3-methacryloxy-2-hydroxy propoxy)phenyl]propane. The bioactive cement is capable of forming a hydroxyapatite layer on a surface of a hardened cement body when the hardened cement body is brought into contact with body fluid.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: June 18, 1996
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Takao Yamamuro, Takashi Nakamura, Keiichi Kawanabe, Takehiro Shibuya, Satoru Yoshihara
  • Patent number: 5275978
    Abstract: A crystallized glass article having a surface pattern like granite, marble or other natural stones with a line pattern of a desired color or colors, which is formed by fusion bonding small masses of a crystallizable glass material mixed with inorganic pigment powder at a heat-treating temperature higher than the softening point. The surface pattern comprises crystallized glass areas defined by the small masses in the surface layer of the article and the colored line pattern defined by the pigment dispersed in the interfaces between adjacent ones of the small masses in the surface layer.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: January 4, 1994
    Assignee: Nippon Electric Glass Company, Limited
    Inventors: Takehiro Shibuya, Takashi Sakane, Yoshio Hashibe
  • Patent number: 5230954
    Abstract: A fire protective glass panel for use in a fire protective window, door, and partition wall, which comprises at least one sheet of fireproof glass plate and a fluorocarbone resin film of a chain molecular structure type bonded to a side surface of the glass plate and which has non-shattering property as well as fire protection property wherein the fireproof glass plate is a heat-resistant and light transparent crystallized glass plate or, alternatively, the fireproof glass plate is a wire glass plate and the fluorocarbone resin film has a thickness of 0.02-1 mm and is made of one of FEP, PFA, PCTFE, ETFE, and PVDF.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: July 27, 1993
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Akihiko Sakamoto, Kiyoshi Katagi, Takehiro Shibuya
  • Patent number: 5173241
    Abstract: In the injection molding of a hollow shaped article by the injection of not only molten synthetic resin but also compressed gas into a die, a method is provided by this invention which effects the supply of the compressed gas with a multistage compressor and the injected compressed gas is recovered in a recovery container connected to the suction side of the multistage compressor. For the injection molding of a hollow shaped article by the injection of not only molten synthetic resin but also compressed gas into a die, an apparatus is provided by this invention which has a gas nozzle for injecting the compressed gas into the die connected through a first switching valve to the discharge side of the multistage compressor and, at the same time, has the gas nozzle connected through a second switching valve to a recovery container connected to the suction side of the multistage compressor.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: December 22, 1992
    Assignee: Asahi Kasei Kogoyo Kabushiki Kaisha
    Inventors: Takehiro Shibuya, Yasuyoshi Ishihara, Susumu Imai
  • Patent number: 5089345
    Abstract: In a crystallized glass article consisting of crystallized glass masses fusion bonded together and having a principal surface, said principal surface having a surface pattern determined by said masses in a surface layer including said principal surface, said small crystallized glass masses in said surface layer are mainly of flaky crystallized glass pieces, each being a relatively large flattened piece, said flaky pieces overlapping one another at random to make said principal surface rough, said crystallized glass masses in another layer adjacent to and fused to said surface layer being considerably smaller than said flaky pieces. The article is produced by preparing flaky pieces and the smaller masses both of a SiO.sub.2 --Al.sub.2 O.sub.
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: February 18, 1992
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Yoshio Hashibe, Takahiro Matano, Takehiro Shibuya, Takashi Sakane, Yasuhiro Baba, Masanori Moritake
  • Patent number: 5066524
    Abstract: A crystallized glass article with a colored surface pattern, which comprises a crystallized glass substrate having a surface and small glass masses having a color different from the substrate and dispersed and fusion-bonded in the surface to form the colored surface pattern. The crystallized glass article is produced by depositing and dispersing small glass masses with a color on a surface of a substrate of a crystallizable glass with a different color which can precipitate crystals therein with softening and deforming by heat-treating at a heat treating temperature higher than the softening point of the crystallizable glass, then heating the substrate together with the small glass masses at the heat treating temperature.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: November 19, 1991
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Yasuhiro Baba, Masanori Moritake, Takashi Sakane, Yoshio Hashibe, Takehiro Shibuya
  • Patent number: 5061307
    Abstract: A crystallized glass having natural-marble-like surface patterns comprising 45 to 75 wt. % of SiO.sub.2, 1 to 25 wt. % of Al.sub.2 O.sub.3, 1 to 20 wt. % of CaO, 0.5 to 17 wt. % of MgO, 0.1 to 18 wt. % of BaO, 0 to 18 wt. % of ZnO, 1 to 15 wt. % of Na.sub.2 O, 0 to 7 wt. % of K.sub.2 O, 0 to 5 wt. % of Li.sub.2 O, 0 to 10 wt. % of B.sub.2 O.sub.3, 0 to 10 wt. % of P.sub.2 O.sub.5, 0 to 1 wt. % of As.sub.2 O.sub.3, and 0 to 1 wt. % of Sb.sub.2 O.sub.3, substantially free from nucleating agent, in which diopside type crystals are precipitated, and a method of producing the crystallized glass are disclosed.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: October 29, 1991
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Takahiro Matano, Yoshio Hashibe, Masayuki Ninomiya, Takehiro Shibuya
  • Patent number: 5034353
    Abstract: A high-mechanical strength biocompatible crystallized glass essentially comprises both crystallines consisting of tetrasilicic fluorine mica series and calcium phosphate series. The crystallized glass has substantially non-sodium oxide and useful in a dental medical care, as repairing material of tooth.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: July 23, 1991
    Assignee: Nippon Electric Glass Co. Ltd.
    Inventors: Takehiro Shibuya, Akira Matsui, Yoshinori Morita, Kiyoyuki Okunaga, Masayuki Ninomiya
  • Patent number: 4952365
    Abstract: A process for producing a foamable thermoplastic resin article having a relatively thin non-foamed outer shell with a smooth surface and a foamed core portion, which has excellent dimensional stability, by pressurizing a mold cavity under a pressure of gas less than the foaming pressure and not less than the surface smoothing pressure of the foamable resin and permitting the pressure of the gas simultaneously with completion of the injection to be communicated to an atmospheric pressure or lower.
    Type: Grant
    Filed: March 18, 1987
    Date of Patent: August 28, 1990
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Takehiro Shibuya, Takashi Nagahara, Susumu Imai