Patents by Inventor Hiroaki Kumada

Hiroaki Kumada 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: 20240123261
    Abstract: The purpose is to prevent the irradiation beam from leaking between the beam irradiation port of the radiation therapy device and the patient affected area that is the target of the emitted irradiation beam, a radiation shielding jig comprising a tare filled with shielding material particles; the tare is made of a resin fabric and has a hollow three-dimensional shape with a radiation pathway portion, the shielding material particles comprising a mixture of sintered particles having a predetermined particle diameter with radiation shielding performance and resin particles having a predetermined particle diameter.
    Type: Application
    Filed: October 5, 2023
    Publication date: April 18, 2024
    Inventors: Hiroaki KUMADA, Naoyuki KITAMURA, Tetsuyuki NAKAMURA, Takeshi IKEDA
  • Publication number: 20220336117
    Abstract: As a sintered body for a radiation shielding material, which can effectively shield mainly low-energy-level neutrons, that is, thermal neutrons and lower, slow neutrons, and has excellent physical properties such as bending strength and Vickers hardness, leading to high machining strength, a sintered body for a radiation shielding material comprising LiF ranging between 99 wt. % to 5 wt. %, and one or more fluorides selected from among MgF2, CaF2, AlF3, KF, NaF, and/or YF3 ranging between 1 wt. % to 95 wt. %, having physical properties of a relative density of 92% or more, a bending strength of 50 MPa or more, and a Vickers hardness of 100 or more, is provided.
    Type: Application
    Filed: August 20, 2021
    Publication date: October 20, 2022
    Applicants: UNIVERSITY OF TSUKUBA, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, DAICO MFG CO., LTD.
    Inventors: Hiroaki KUMADA, Naoyuki KITAMURA, Tetsuyuki NAKAMURA, Takeshi IKEDA
  • Patent number: 10961160
    Abstract: A fluoride sintered body suitable for a moderator which moderates high-energy neutrons so as to generate neutrons for medical care with which an affected part of the deep part of the body is irradiated to make a tumor extinct comprises MgF2 of a compact polycrystalline structure having a bulk density of 2.90 g/cm3 or more and as regards mechanical strengths, a bending strength of 10 MPa or more and a Vickers hardness of 71 or more.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: March 30, 2021
    Assignees: UNIVERSITY OF TSUKUBA, DAICO MFG CO., LTD.
    Inventors: Hiroaki Kumada, Tetsuyuki Nakamura, Takuji Shigeoka, Takeshi Ikeda
  • Patent number: 10777330
    Abstract: A MgF2 system fluoride sintered body for a radiation moderator having a compact polycrystalline structure excellent in radiation moderation performance, especially neutron moderation performance, contains CaF2 of 90% by weight at the maximum and has a relative density of 95.2% or more.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: September 15, 2020
    Assignees: TECHNO EYE CORPORATION, DAICO MFG CO., LTD., UNIVERSITY OF TSUKUBA
    Inventors: Hiroaki Kumada, Tetsuyuki Nakamura, Takeshi Ikeda, Takuji Shigeoka
  • Patent number: 9789335
    Abstract: A MgF2—CaF2 binary system sintered body for a radiation moderator having a compact polycrystalline structure excellent in radiation moderation performance, especially neutron moderation performance, comprises MgF2 containing CaF2 from 0.2% by weight to 90% by weight inclusive, having a bulk density of 2.96 g/cm3 or more, and a bending strength of 15 MPa or more and a Vickers hardness of 90 or more as regards mechanical strengths.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: October 17, 2017
    Assignees: TECHNO EYE CORPORATION, DAICO MFG CO., LTD., UNIVERSITY OF TSUKUBA
    Inventors: Hiroaki Kumada, Tetsuyuki Nakamura, Takeshi Ikeda, Takuji Shigeoka
  • Publication number: 20160351282
    Abstract: A MgF2 system fluoride sintered body for a radiation moderator having a compact polycrystalline structure excellent in radiation moderation performance, especially neutron moderation performance, contains CaF2 of 90% by weight at the maximum and has a relative density of 95.2% or more.
    Type: Application
    Filed: December 18, 2015
    Publication date: December 1, 2016
    Applicants: UNIVERSITY OF TSUKUBA, TECHNO EYE CORPORATION, DAICO MFG CO., LTD.
    Inventors: Hiroaki KUMADA, Tetsuyuki NAKAMURA, Takeshi IKEDA, Takuji SHIGEOKA
  • Publication number: 20160082282
    Abstract: A MgF2-CaF2 binary system sintered body for a radiation moderator having a compact polycrystalline structure excellent in radiation moderation performance, especially neutron moderation performance, comprises MgF2 containing CaF2 from 0.2% by weight to 90% by weight inclusive, having a bulk density of 2.96 g/cm3 or more, and a bending strength of 15 MPa or more and a Vickers hardness of 90 or more as regards mechanical strengths.
    Type: Application
    Filed: April 13, 2015
    Publication date: March 24, 2016
    Inventors: Hiroaki KUMADA, Tetsuyuki NAKAMURA, Takeshi IKEDA, Takuji SHIGEOKA
  • Publication number: 20160002116
    Abstract: A fluoride sintered body suitable for a moderator which moderates high-energy neutrons so as to generate neutrons for medical care with which an affected part of the deep part of the body is irradiated to make a tumor extinct comprises MgF2 of a compact polycrystalline structure having a bulk density of 2.90 g/cm3 or more and as regards mechanical strengths, a bending strength of 10 MPa or more and a Vickers hardness of 71 or more.
    Type: Application
    Filed: May 27, 2014
    Publication date: January 7, 2016
    Inventors: Hiroaki KUMADA, Tetsuyuki NAKAMURA, Takuji SHIGEOKA, Takeshi IKEDA
  • Publication number: 20110068302
    Abstract: The present invention provides a molded multi-layer body having a layer of liquid crystal polymer and is excellent in strength, which contains two or more thermoplastic resin layers and one or more adhesive layers, wherein at least one of the thermoplastic resin layers is a layer (A) containing liquid crystal polymer, at least one of the thermoplastic resin layers is a layer (B) containing thermoplastic resin other than the liquid crystal polymer, and the layer (A) and the layer (B) are stacked via an adhesive layer (C) containing an epoxy group-containing ethylene copolymer consisting of: (a) 50 to 99% by weight of ethylene units; (b) 0.1 to 30% by weight of unsaturated carboxylic acid glycidyl ester units or unsaturated glycidyl ether units; and (c) 0 to 50% by weight of (meth)acrylate units.
    Type: Application
    Filed: December 1, 2010
    Publication date: March 24, 2011
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yasuhiro YAMASHITA, Shino Matsumi, Hiroaki Kumada, Takanari Yamaguchi
  • Publication number: 20080132673
    Abstract: The present invention provides a film comprising component A and component B, wherein the component A is at least one compound selected from a group consisting of aromatic polyamides, aromatic polyimides, and aromatic polyamideimides, and component B is a liquid crystal polymer showing optical anisotropy in molten state, and methods for preparing films.
    Type: Application
    Filed: January 16, 2008
    Publication date: June 5, 2008
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Hiroyuki Sato, Yasuo Shinohara, Hiroaki Kumada
  • Publication number: 20060141275
    Abstract: The present invention provides a molded multi-layer body having a layer of liquid crystal polymer and is excellent in strength, which contains two or more thermoplastic resin layers and one or more adhesive layers, wherein at least one of the thermoplastic resin layers is a layer (A) containing liquid crystal polymer, at least one of the thermoplastic resin layers is a layer (B) containing thermoplastic resin other than the liquid crystal polymer, and the layer (A) and the layer (B) are stacked via an adhesive layer (C) containing an epoxy group-containing ethylene copolymer consisting of: (a) 50 to 99% by weight of ethylene units; (b) 0.1 to 30% by weight of unsaturated carboxylic acid glycidyl ester units or unsaturated glycidyl ether units; and (c) 0 to 50% by weight of (meth)acrylate units.
    Type: Application
    Filed: November 29, 2005
    Publication date: June 29, 2006
    Inventors: Yasuhiro Yamashita, Shino Matsumi, Hiroaki Kumada, Takanari Yamaguchi
  • Publication number: 20060127687
    Abstract: A process for preparing an aramid laminate, which comprises impregnating a surface and an interior an aramid paper with a liquid crystal polymer, and laminating a layer comprising an aramid paper and a layer comprising a liquid crystal polymer.
    Type: Application
    Filed: December 17, 2003
    Publication date: June 15, 2006
    Inventors: Takanari Yamaguchi, Hiroaki Kumada
  • Patent number: 7008693
    Abstract: Highly heat-resistant labels usable with the adherends which can be exposed to high temperatures are provided and include the following: (1) a highly heat-resistant label comprising a support base and a hot-melt adhesive layer composed of a thermoplastic resin showing optical anisotropy in molten state and/or a thermoplastic polyimide; (2) a label of (1), further having an agglutinant layer, wherein the agglutinant layer, hot-melt adhesive layer and support base are laminated in that order; and (3) a label of (1) or (2), wherein the thermoplastic resin showing optical anisotropy in molten state comprises a completely aromatic liquid crystal polyester.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: March 7, 2006
    Assignees: Sumitomo Chemical Company, Yushi-Seihin Co., Ltd.
    Inventors: Shino Matsumi, Takanari Yamaguchi, Hiroaki Kumada, Masaru Kijima, Shinji Kinoshita, Koji Age
  • Publication number: 20060019110
    Abstract: The present invention provides a film comprising component A and component B, wherein the component A is at least one compound selected from a group consisting of aromatic polyamides, aromatic polyimides, and aromatic polyamideimides, and component B is a liquid crystal polymer showing optical anisotropy in molten state.
    Type: Application
    Filed: June 27, 2005
    Publication date: January 26, 2006
    Inventors: Hiroyuki Sato, Yasuo Shinohara, Hiroaki Kumada
  • Patent number: 6843887
    Abstract: Provided is low hygroscopic paper obtainable by heat-pressing composite paper comprising a pulp component and/or fiber component and, a liquid crystal polymer filler component made of a liquid crystal polymer exhibiting optical anisotropy in molten state, at a temperature higher than the flow initiation temperature of said liquid crystal polymer by 30° C. or more. The low hygroscopic paper has also excellent machanical strength and heat resistance, and can be used as a substrate paper such as a prepreg particularly useful for electric and electronic circuit boards.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: January 18, 2005
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroaki Kumada, Takanari Yamaguchi
  • Publication number: 20040038025
    Abstract: Highly heat-resistant labels usable with the adherends which can be exposed to high temperatures are provided.
    Type: Application
    Filed: June 10, 2003
    Publication date: February 26, 2004
    Inventors: Shino Matsumi, Takanari Yamaguchi, Hiroaki Kumada, Masaru Kijima, Shinji Kinoshita, Koji Age
  • Publication number: 20030017353
    Abstract: Provided is an indication label having excellent heat resistance and hydroscopic resistance, comprising a supporting substrate having a printable surface and an adhesive layer on the other surface of the printable surface, wherein the supporting substrate is made of a liquid crystal polymer showing optical anisotropy in molten state. The label is suitably used under high temperature and high humidity.
    Type: Application
    Filed: May 20, 2002
    Publication date: January 23, 2003
    Inventors: Takanari Yamaguchi, Hiroaki Kumada
  • Publication number: 20030010376
    Abstract: Provided is an outer covering for solar battery, comprising a resin laminate having a liquid crystal polymer layer showing optical anisotropy in molten state, which has excellent water vapor-barrier property and imparts durability to the solar
    Type: Application
    Filed: April 10, 2002
    Publication date: January 16, 2003
    Inventors: Takanari Yamaguchi, Hiroaki Kumada
  • Publication number: 20020153111
    Abstract: Provided is low hygroscopic paper obtainable by heat-pressing composite paper comprising a pulp component and/or fiber component and, a liquid crystal polymer filler component made of a liquid crystal polymer exhibiting optical anisotropy in molten state, at a temperature higher than the flow initiation temperature of said liquid crystal polymer by 30 ° C. or more. The low hygroscopic paper has also excellent machanical strength and heat resistance, and can be used as a substrate paper such as a prepreg particularly useful for electric and electronic circuit boards.
    Type: Application
    Filed: March 21, 2002
    Publication date: October 24, 2002
    Inventors: Hiroaki Kumada, Takanari Yamaguchi
  • Publication number: 20020048641
    Abstract: Provided is elastomer molded products including a construction comprising a liquid crystal polymer layer and an elastomer layer or a construction wherein liquid crystal polymer flakes are dispersed in the elastomer. The elastomer molded products are excellent in gas barrier properties and can be made thin without sacrificing the flexibility as elastomer.
    Type: Application
    Filed: June 18, 2001
    Publication date: April 25, 2002
    Inventors: Takanari Yamaguchi, Yasuaki Hidaka, Hiroaki Kumada