Patents by Inventor Kenichi Yoshioka

Kenichi Yoshioka 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: 20100178487
    Abstract: A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2). (1) a thermoplastic resin particle or fiber [C] and a conductive particle or fiber [D] are contained, and weight ratio expressed by [compounding amount of [C] (parts by weight)]/[compounding amount of [D] (parts by weight)] is 1 to 1000. (2) a conductive particle or fiber of which thermoplastic resin nucleus or core is coated with a conductive substance [E] is contained.
    Type: Application
    Filed: August 7, 2007
    Publication date: July 15, 2010
    Inventors: Nobuyuki Arai, Norimitsu Natsume, Kenichi Yoshioka, Junko Kawasaki, Hiroshi Takezaki
  • Publication number: 20090318049
    Abstract: In an electrically conductive sheath-core conjugate fiber including an electrically conductive layer made of a thermoplastic polymer (A) containing electrically conductive carbon black fine particles which constitutes a sheath component and a protective layer made of a fiber-forming thermoplastic polymer (B) which constitutes a core component, the ratio of the (A) to the total weight of the (A) and the (B) is 10 to 35% by weight, the L1/L0 ratio is 1.04 to 10.0 where L1 represents the length of a boundary between the core component and the sheath component in a cross section of the conjugate fiber and L0 represents the length of the circumference of a core component, the fineness, the strength at break and the elongation at break are each adjusted within specified ranges, the shrinkage in hot water at 100° C. is within a specified range, and the fiber surface coverage of the sheath component is 85% or more.
    Type: Application
    Filed: June 21, 2007
    Publication date: December 24, 2009
    Applicant: Kuraray Co., Ltd.
    Inventors: Hitoshi Nakatsuka, Tadayoshi Koizumi, Kazuhiko Tanaka, Nobuhiro Koga, Masao Kawamoto, Kenichi Yoshioka
  • Publication number: 20090252271
    Abstract: A first intensity Az expressed as Az=az×E?, a first reference intensity A0 expressed as A0=a0×E?, a second intensity Bz expressed as Bz=bz×E, and a second reference intensity B0=b0×E, are evaluated. The first intensity and the first reference intensity are of radioactive nuclides generated by a neutron capture reaction of a heavy nuclide or a fission product nuclide. The second intensity and the second reference intensity are of radioactive fission product nuclides except nuclides generated by a neutron capture reaction. The reference intensities are measured where the void fraction is known. Also a correlation curve of (az/a0) and a void fraction is evaluated. Finally an axial void fraction distribution is evaluated based on the value of (az/a0) and the correlation curve.
    Type: Application
    Filed: December 29, 2008
    Publication date: October 8, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Makoto Ueda, Hironori Kumanomido, Ishi Mitsuhashi, Tsukasa Kikuchi, Kenichi Yoshioka, Tomoharu Sasaki, Kouji Hiraiwa
  • Publication number: 20090117800
    Abstract: An electrically conductive composite fiber comprising an electrically conductive layer formed of a polyester-based polymer (A) having a melting point of 200° C. or higher and containing from 23 to 33% by weight of electrically conductive carbon black, and a protective layer formed of a polyester-based polymer (B) having a melting point of 210° C. or higher, wherein the difference between the SP value of the (A) and the SP value of the (B) is adjusted to not greater than a predetermined value and the fiber strength and the elongation at break are adjusted within certain ranges. This can make it possible to obtain an electrically conductive composite fiber that has a superior antistatic performance, which is not degraded very much over a practical wearing for a long term, though it contains only a relatively small amount of electrically conductive carbon black, and that is suitable for the field of clothing such as clean room wears and working wears.
    Type: Application
    Filed: October 13, 2006
    Publication date: May 7, 2009
    Applicant: KURARAY CO., LTD.
    Inventors: Hitoshi Nakatsuka, Tadayoshi Koizumi, Kazuhiko Tanaka, Nobuhiro Koga, Masao Kawamoto, Kenichi Yoshioka
  • Publication number: 20090047516
    Abstract: Provided is an electrically conductive conjugate fiber formed by conjugating an electrically conductive layer (A) including 60 to 80% by weight of a thermoplastic resin and 20 to 40% by weight of electrically conductive particles and a protective layer (B) including 50 to 95% by weight of polyethylene terephthalate and 5 to 50% by weight of polyethylene-2,6-naphthalate, wherein the fiber has a degree of elongation (DE) of 100 to 350%. This provides an electrically conductive conjugate fiber which exhibits a small change with time in physical properties such as a degree of elongation or boiling water shrinkage during its transportation or storage, while having a certain degree of elongation.
    Type: Application
    Filed: March 1, 2007
    Publication date: February 19, 2009
    Applicant: KURARAY CO., LTD.
    Inventors: Tadayoshi Koizumi, Kazuhiko Tanaka, Masao Kawamoto, Hitoshi Nakatsuka, Nobuhiro Koga, Kenichi Yoshioka
  • Publication number: 20090028284
    Abstract: A method of controlling the criticality of a nuclear fuel cycle facility includes steps of producing a reactor fuel by adding less than 0.1% by weight of gadolinia to a uranium dioxide powder with a uranium enrichment of greater than 5% by weight and controlling the effective neutron multiplication factor of a uranium dioxide system in a step of handling the reactor fuel to be less than or equal to the maximum of the effective neutron multiplication factor of a uranium dioxide system with a uranium enrichment of 5% by weight.
    Type: Application
    Filed: May 14, 2008
    Publication date: January 29, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shoichi Watanabe, Ishi Mitsuhashi, Kenichi Yoshioka
  • Publication number: 20080224440
    Abstract: A crank for a bicycle, excellent in production efficiency, excellent in fatigue durability and rigidly, and light in weight. The crank has an outer shell made of a fiber-reinforced plastic, a first insert member configured and arranged to introduce a load from a pedal shaft, and a second insert member coupled to a bracket spindle and configured and arranged to transmit a load to a sprocket. The outer shell comprises at least two fiber-reinforced plastic members at least a part of each of which is molded in advance.
    Type: Application
    Filed: January 7, 2005
    Publication date: September 18, 2008
    Inventors: Yasuhisa Masuda, Kenichi Yoshioka, Tetsu Nonoshita, Takuji Kishita
  • Publication number: 20080205574
    Abstract: A control rod for nuclear reactors includes four wings including neutron absorbers containing hafnium, a front end structural member which has a cross shape in cross section and includes brackets bonded to the leading ends of the wings, and a terminal end structural member which has a cross shape in cross section and includes brackets bonded to the tailing ends of the wings. The four wings are bonded to a wing-bonding member including a cross-shaped center shaft so as to form a cross shape. The front end structural member and the wing-bonding member are made of a zirconium alloy. The wings include neutron-absorbing plates having neutron-absorbing portions and each have an outer surface which is opposed to a fuel assembly and at which a hafnium-zircaloy composite member covered with zircaloy is disposed. The neutron-absorbing plates are opposed to each other with trap spaces disposed therebetween.
    Type: Application
    Filed: February 21, 2008
    Publication date: August 28, 2008
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuuji SAITO, Mitsuharu NAKAMURA, Makoto UEDA, Yoshinori KATAYAMA, Motoji TSUBOTA, Satoko TAJIMA, Yoshiji KARINO, Kenichi YOSHIOKA, Kosaku TSUMITA
  • Publication number: 20080160860
    Abstract: The invention provides epoxy resin composition containing, as epoxy resin, the following epoxy resin (a) and epoxy resin (b), solid rubber at a ratio of 1 to 20 parts by weight to 100 parts by weight of the entire epoxy resins, and an aromatic amine as a curing agent and having a glass transition temperature of 160 to 220° C. in form of a cured material after heat curing at 180° C. for 2 hours: (a) an epoxy resin having oxazolidone rings and (b) a glycidylamine type epoxy resin.
    Type: Application
    Filed: March 2, 2005
    Publication date: July 3, 2008
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Motohiro Kuroki, Nobuyuki Tomioka, Naomi Wadahara, Kenichi Yoshioka, Hiroaki Sakata, Eisuke Wadahara, Hiroki Oosedo
  • Publication number: 20070202255
    Abstract: The present invention relates to a composite material using titanium or a titanium alloy, and concerns such a composite material obtained through processes in which after an imidazole compound has been applied to the surface of titanium or a titanium alloy, an adherend is adhered thereto. The composite material of the present invention is obtained by adhering the adhere thereto by using an adhesive resin composition containing a thermoplastic resin having a fracture energy release rate G1c of 4500 J/m2 or more. The present invention makes it possible to provide a composite material using titanium or a titanium alloy, which exerts a superior adhesive strength stably at room temperature as well as even after exposure to a high-temperature, high-humidity condition.
    Type: Application
    Filed: September 29, 2004
    Publication date: August 30, 2007
    Inventors: Tomoyuki Shinoda, Kenichi Yoshioka
  • Publication number: 20070076839
    Abstract: A first intensity Az expressed as Az=az×E?, a first reference intensity Ao expressed as Ao=ao×E?, a second intensity Bz expressed as Bz=bz×E, and a second reference intensity Bo=bo×E, are evaluated. The first intensity and the first reference intensity are of radioactive nuclides generated by a neutron capture reaction of a heavy nuclide or a fission product nuclide. The second intensity and the second reference intensity are of radioactive fission product nuclides except nuclides generated by a neutron capture reaction. The reference intensities are measured where the void fraction is known. Also a correlation curve of (az/ao) and a void fraction is evaluated. Finally an axial void fraction distribution is evaluated based on the value of (az/ao) and the correlation curve.
    Type: Application
    Filed: May 16, 2006
    Publication date: April 5, 2007
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Makoto Ueda, Hironori Kumanomido, Ishi Mitsuhashi, Tsukasa Kikuchi, Kenichi Yoshioka, Tomoharu Sasaki, Kouji Hiraiwa
  • Patent number: 6909926
    Abstract: A production control method manages the development progress of a plurality of products transmitted from production terminals of a plurality of producers, by analyzing components of the products based on standard values, and evaluating the progress in producing the products.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: June 21, 2005
    Assignee: Fujitsu Limited
    Inventor: Kenichi Yoshioka
  • Publication number: 20030163215
    Abstract: A production control method manages the development progress of a plurality of products transmitted from production terminals of a plurality of producers, by analyzing components of the products based on standard values, and evaluating the progress in producing the products.
    Type: Application
    Filed: July 12, 2002
    Publication date: August 28, 2003
    Applicant: FUJITSU LIMITED
    Inventor: Kenichi Yoshioka
  • Patent number: 6468613
    Abstract: Light metal/CFRP-made structural members which are characterized in that they are structural materials in which a CFRP material is stuck to the surface of a light metal material via an adhesive agent layer of thickness at least 10 &mgr;m and up to 500 &mgr;m, and the volume resistivity of the adhesive agent layer between said metal material and said CFRP material is at least 1×1013 &OHgr;.cm and, furthermore, the adhesive strength at room temperature is at least 15 MPa. In accordance with the present invention, since conventional light metal/CFRP structural materials can be made lighter and, furthermore, since the resistance to galvanic corrosion is outstanding and it is possible to markedly enhance the strength and the impact energy absorption performance, the development of applications and large-scale expansion into new fields becomes possible. Weight reduction and enhancing the durability and reliability of structures also makes a considerable contribution in terms of environmental protection.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: October 22, 2002
    Assignee: Toray Industries, Inc.
    Inventors: Akihiko Kitano, Kenichi Yoshioka, Kenichi Noguchi, Hitoshi Nishiyama
  • Patent number: 6384128
    Abstract: A thermoplastic resin composition capable of providing a thin walled molded article whose flame retardancy with a thickness of 1.6 mm ({fraction (1/16)} inch) in accordance with an UL 94 standard is V-0 or better, and which comprises the following components [A], [B] and [C], wherein the component [B] satisfies the following conditions (B1) and/or (B2): [A]: an electrically conductive fiber; [B]: a carbon powder; [C]: a thermoplastic resin; (B1): Raman scattering intensity ratio I2/I1 is 0.55-0.8; (B2): Raman scattering intensity ratio I2/I3 is 0.54-0.8;  where I1: local maximum value of Raman scattering intensity appearing near a Raman shift of 1360 cm−1; I2: local minimum value of the Raman scattering intensity appearing near a Raman shift of 1480 cm−1; I3: local maximum value of the Raman scattering intensity appearing neat a Raman shift of 1600 cm−1.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: May 7, 2002
    Assignee: Toray Industries, Inc.
    Inventors: Eisuke Wadahara, Kenichi Yoshioka, Soichi Ishibashi
  • Patent number: 6306474
    Abstract: The present invention relates to a carbon fiber reinforced plastic member provided with high-elongation fiber bundle regions, which are uni-directionally aligned and separately disposed within the plastic member. The plastic member provides a carbon fiber reinforced plastic of lightweight, high strength and high modulus that is safe. Even if it breaks, it shows little scatter of fragments or exposure of dangerous fracture surfaces. Preferably, the high-elongation fiber at break has an elongation exceeding about 10%.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 23, 2001
    Assignee: Toray Industries, Inc.
    Inventors: Kenichi Yoshioka, Takehiko Hirose, Kenichi Noguchi
  • Patent number: 5567796
    Abstract: A fiber or filament comprising a polyester copolymerized with 2 to 20 mole % of a compound having a specific structure, which has one or two ester-forming functional groups. The polyester fiber or filament has a low birefringence and excellent dyeability and deep color development. The polyester fiber or filament is provided, when drawn under selected conditions, with not only high shrinkage ratio but also high shrinking stress, and has excellent lightfastness, thereby being useful while replacing conventional highly shrinkable fibers.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: October 22, 1996
    Assignee: Kuraray Co., Ltd.
    Inventors: Sigeki Nakatsukasa, Kenichi Yoshioka, Kiyoshi Hirakawa, Kazuhiko Tanaka, Masao Kawamoto, Nozomu Sugoh, Atsuko Migaki, Shunro Taniguchi