Patents by Inventor Hajime Kitano

Hajime Kitano 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: 20100286301
    Abstract: This invention relates to a photo-curing or electron beam-curing adherent resin composition being excellent in the adhesiveness to various adherends such as metal oxide, metal, resin and so on, and more particularly to an adherent resin composition of a photo-curing or electron beam-curing type comprising a difunctional urethane (metha)acrylate oligomer (A) and a monomer component (B), characterized in that the urethane (metha)acrylate oligomer includes a urethane prepolymer portion composed of a polyol and a polyisocyanate wherein repetitive number of urethane prepolymer portion (n) is 10-30, and the monomer component (B) is a cyclic monomer having a (metha)acryloyl group.
    Type: Application
    Filed: December 9, 2008
    Publication date: November 11, 2010
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Junji Sakata, Hajime Kitano, Hiroyuki Kanesugi
  • Patent number: 7705823
    Abstract: Each embodiment relates to an image display device which comprises an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on one or both substrates is applied, are made to fly and move so as to display an image.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: April 27, 2010
    Assignee: Bridgestone Corporation
    Inventors: Norio Nihei, Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe, Reiji Hattori
  • Publication number: 20100076107
    Abstract: The invention provides a photocurable liquid rubber composition containing a liquid styrene-butadiene copolymer having, at each end of a molecular chain thereof, a functional group having a photocurable unsaturated hydrocarbon group, a (meth)acryloyl group-containing monomer, and a photopolymerization initiator. The composition can be used without solvent, which realizes easy control of the viscosity thereof, and which exhibits high break strength after curing.
    Type: Application
    Filed: February 8, 2008
    Publication date: March 25, 2010
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Hajime Kitano, Chikara Yamada, Shuuyou Akama
  • Patent number: 7646530
    Abstract: In particles for image displaying used in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles are made to fly and move so as to display an image, each particle has a micro-irregularity at its surface. Moreover, in an image display device, in which one or more kind of particles are sealed between opposed substrates, at least one substrate being transparent, and, in which the particles, to which an electrostatic field produced by two kinds of electrodes having different potentials is applied, are made to fly and move so as to display an image, use is made of each particle having a micro-irregularity at its surface.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: January 12, 2010
    Assignee: Bridgestone Corporation
    Inventors: Koji Takagi, Kazuya Murata, Norio Nihei, Gaku Yakushiji, Hajime Kitano, Yoshitomo Masuda, Takahiro Kawagoe
  • Publication number: 20090290208
    Abstract: The present invention provides particles for display media constituting the display media used for an information display panel, in which the display media are sealed between two substrates, at least one of two substrates being transparent, and, in which the display media, to which an electrostatic field is applied, are made to move so as to display information, comprising: the particles having a substantially spherical shape, which are made by polymerizing raw materials including monomers, which include (acrylic or methacrylic) resin-hydrocarbon resin copolymer in the particles, in which a part of or all of the monomers are a multifunctional monomer having a plurality of polymerization reactive groups in one molecule, and which have minute irregularities on their surface evenly. By such a construction, the particles for display media can obtain irregularities firmly fixed on their surface. Poor display can be solved by using the same.
    Type: Application
    Filed: December 14, 2005
    Publication date: November 26, 2009
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Kazuya Murata, Takao Ohuchi, Hajime Kitano
  • Publication number: 20090292061
    Abstract: A flame-retardant composition includes: a powdery acid-modified hydrogenated block copolymer (a) having a bulk density of 0.1 to 0.4 g/ml and which is a hydrogenated block copolymer modified by addition of an unsaturated carboxylic acid or a derivative thereof, the hydrogenated block copolymer comprises a polymer block A composed mainly of a vinyl aromatic compound unit and a polymer block B composed mainly of a conjugated diene unit, and has a weight average molecular weight of 50,000 to 500,000; a polyolefin resin (b); a non-aromatic rubber softener (c); and a metal hydrate (d). The flame-retardant composition contains the components (a), (b), (c) and (d) in proportions that satisfy the following relationships (1) to (3): 0.1?Wa/(Wa+Wb)?0.9??(1) 0.05?Wc/(Wa+Wb+Wc)?0.5??(2) 0.4?Wd/(Wa+Wb+Wc+Wd)?0.
    Type: Application
    Filed: September 12, 2006
    Publication date: November 26, 2009
    Applicant: Kuraray Co., Ltd.
    Inventors: Hajime Kitano, Koichi Wada, Hideo Takamatsu
  • Patent number: 7525719
    Abstract: The present invention intends to provide particles for displaying images used in an image display device capable of displaying and eliminating repeatedly accompanied by flight and movement of particles utilizing Coulomb force, being superior in stability, particularly in repetition durability, memory characteristic stability, adaptability for temperature change, having capability of regulating charge amount, and accordingly, favorable images with sufficient contrast should be stably obtained. The present invention provides particles coated with a resin; specifying Span of particle diameter distribution, charge attenuation property, thermal change of the surface hardness, tensile break strength, Izod impact strength (with a notch), abrasion loss (Taber), tensile elastic modulus, flexural elastic modulus, or tear strength. The present invention also proposes about the structure of the particles.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: April 28, 2009
    Assignee: Bridgestone Corporation
    Inventors: Gaku Yakushiji, Hajime Kitano, Kazuya Murata, Norio Nihei, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe
  • Patent number: 7495819
    Abstract: In the case of filling and setting the liquid powders or the particles in a plurality of cells formed by the partition walls on the substrate, the method includes the steps of: setting a nozzle at an upper portion of a container; setting the substrate, on which the partition walls are arranged, at a lower portion of the container; scattering the liquid powders or the particles dispersed in a gas from the nozzle arranged at the upper portion in the container; and filling the liquid powders or the particles in the cells on the substrate arranged at the lower portion in the container.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: February 24, 2009
    Assignee: Bridgestone Corporation
    Inventors: Ryou Sakurai, Kazuyoshi Akuzawa, Hirotaka Yamazaki, Hiroyuki Anzai, Hajime Kitano, Kazuya Murata, Gaku Yakushiji, Norihiko Kaga, Taichi Kobayashi, Toshiaki Arai, Yoshitomo Masuda
  • Patent number: 7483202
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: January 27, 2009
    Assignee: Bridgestone Corporation
    Inventors: Ryo Sakurai, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano
  • Publication number: 20080174854
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Application
    Filed: March 21, 2008
    Publication date: July 24, 2008
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Ryo SAKURAI, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano
  • Patent number: 7369299
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: May 6, 2008
    Assignee: Bridgestone Corporation
    Inventors: Ryo Sakurai, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano
  • Patent number: 7321459
    Abstract: In the image display device according to the first aspect of the invention, a liquid powder composed of a solid material stably floating as a dispersant in a gas and exhibiting a high fluidity in an aerosol state is sealed between opposed substrates, at least one substrate being transparent, and the liquid powder is moved. Moreover, in the image display device according to the second aspect of the invention, a porous spacer is arranged between opposed substrates, at least one substrate being transparent, a liquid powder composed of a solid material stably floating as a dispersant in gas and exhibiting a high fluidity in an aerosol state is sealed, and the liquid powder is moved.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: January 22, 2008
    Assignee: Bridgestone Corporation
    Inventors: Yoshitomo Masuda, Gaku Yakushiji, Kazuya Murata, Norio Nihei, Koji Takagi, Itsuo Tanuma, Hajime Kitano, Takahiro Kawagoe
  • Patent number: 7311969
    Abstract: In a semiconductive member having a coating film containing a conductive agent formed on the surface of a substrate such as an elastic material, or a semiconductive member having an elastic material as a substrate containing a conductive agent, the conductive agent is coated with an ion-containing resin or a resin having high charge attenuation properties.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: December 25, 2007
    Assignee: Kabushiki Kaisha Bridgestone
    Inventors: Yoshitomo Masuda, Gaku Yakushiji, Takao Ohuchi, Hajime Kitano
  • Patent number: 7247674
    Abstract: The present invention concerns a polymer composition comprising: a block copolymer (a) including a polymer block A, which is composed mainly of an ?-methylstyrene, and a hydrogenated or unhydrogenated polymer block B, which is composed of a conjugated diene or isobutylene and has a weight average molecular weight of 30,000 to 200,000; an acrylic resin (b); and a softener (c), wherein proportions (by mass) of the respective components in the polymer composition are such that each of the following relationships (1) and (2) holds: 0.05?Wb/Wa?2 and??(1) Wc/(Wa+Wb+Wc)?0.5??(2) wherein Wa, Wb, and Wc represent amounts (by mass) of the block copolymer (a), the acrylic resin (b) and the softener (c), respectively.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: July 24, 2007
    Assignee: Kuraray Co., Ltd.
    Inventors: Hajime Kitano, Kenji Shachi, Noboru Higashida, Koichi Wada, Mizuho Maeda
  • Patent number: 7224510
    Abstract: A reversible image display panel which comprises a pair of substrates one of which is transparent and a group of particles charged with single polarity, a group of particles with single color charged with single polarity, a group of particles having portions with different colors and different charge characteristics, or two groups of particles with different charge characteristics each enclosed between the substrates, characterized in applying an electric field across the substrates, and displaying images by flying and moving the particles. The reversible image display panel and the image display device in accordance with the invention have fast response speed and simple structure, being superior in stability and vividity. In an occasion of driving, generation of the strong electric field is unnecessary for them and accordingly, electric circuits can be assembled employing general purpose electronic materials.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: May 29, 2007
    Assignee: Bridgestone Corporation
    Inventors: Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Norio Nihei, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe
  • Publication number: 20060263927
    Abstract: In an image display panel: in which at least one group of particles or liquid particles is sealed between opposed substrates, at least one of two substrates being transparent; in which the particles or the liquid powders, to which an electrostatic field is applied, are made to move so as to display an image; and in which partition walls arranged between the substrates according to need, use is made of the substrate in which at least a surface, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (first aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is subjected to a hydrophobic treatment (second aspect), at least a surface of the partition wall, to which the particles or the liquid powders are contacted, is coated by a material having a small charge decay property (third aspect), a universal hardness of a binder resin used for a material constituting the partition wall is not less than 400 N/mm2, whi
    Type: Application
    Filed: February 25, 2004
    Publication date: November 23, 2006
    Inventors: Ryo Sakurai, Hidetoshi Hiraoka, Taichi Kobayashi, Hirotaka Yamazaki, Hajime Kitano
  • Publication number: 20060238488
    Abstract: Each embodiment relates to an image display device which comprises an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on one or both substrates is applied, are made to fly and move so as to display an image.
    Type: Application
    Filed: February 7, 2003
    Publication date: October 26, 2006
    Inventors: Norio Nihei, Hajime Kitano, Gaku Yakushiji, Kazuya Murata, Koji Takagi, Yoshitomo Masuda, Takahiro Kawagoe, Reiji Hattori
  • Publication number: 20060231401
    Abstract: In the case of filling and setting the liquid powders or the particles in a plurality of cells formed by the partition walls on the substrate, the method includes the steps of: setting a nozzle at an upper portion of a container; setting the substrate, on which the partition walls are arranged, at a lower portion of the container; scattering the liquid powders or the particles dispersed in a gas from the nozzle arranged at the upper portion in the container; and filling the liquid powders or the particles in the cells on the substrate arranged at the lower portion in the container.
    Type: Application
    Filed: December 17, 2003
    Publication date: October 19, 2006
    Inventors: Ryou Sakurai, Kazuyoshi Akuzawa, Hirotaka Yamazaki, Hiroyuki Anzai, Hajime Kitano, Kazuya Murata, Gaku Yakushiji, Norihiko Kaga, Taichi Kobayashi, Toshiaki Arai, Yoshitomo Masuda
  • Publication number: 20060209008
    Abstract: An image display device according to first to third aspects of the invention has an image display panel, in which two or more groups of particles having different colors and different charge characteristics are sealed between two substrates, at least one of two substrates being transparent, and, in which the particles, to which an electrostatic field produced by a pair of electrodes provided on respective substrates is applied, are made to fly and move so as to display an image. In the first aspect of the invention, micro-concave portions and/or micro-convex portions are provided to a part of or an overall of a surface of the electrode (first embodiment) or micro-cutout holes are provided to a part of or an overall of a surface of the electrode (second embodiment).
    Type: Application
    Filed: April 17, 2003
    Publication date: September 21, 2006
    Applicant: Bridgestone Corporation
    Inventors: Norio Nihei, Hajime Kitano, Koji Takagi, Gaku Yakushiji, Kazuya Murata, Ryou Sakurai, Yoshinori Iwabuchi, Hirotaka Yamazaki, Yoshitomo Masuda, Reiji Hattori
  • Patent number: 7105600
    Abstract: A polymer composition obtainable by subjecting a particular crosslinkable polymer composition to dynamic crosslinking. The crosslinkable polymer composition contains. (a) a block copolymer comprising two or more polymer blocks of a vinyl aromatic compound and one or more (hydrogenated) polymer blocks of a conjugated diene; (b) an olefin copolymer having a density of 0.88 to 0.92 g/cm2 and obtained through copolymerization of ethylene and an ?-olefin having 4 to 12 carbon atoms; (c) a softening agent; and (d) an organic peroxide in respective amounts that satisfy the following relational expressions {circle around (1)} to {circle around (3)}: 0.66?Wb/Wa?4{circle around (1)} 0?Wc/(Wa+Wb+Wc)?0.25{circle around (2)} 0.001?Wd/(Wa+Wb+Wc)?0.01{circle around (3)} wherein Wa, Wb, Wc and Wd represent the respective amounts (by mass) of the components (a), (b), (c) and (d), that are present in the polymer composition prior to the dynamic crosslinking.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: September 12, 2006
    Assignee: Kuraray Co., Ltd.
    Inventors: Hajime Kitano, Koichi Wada, Masanari Uno