Patents by Inventor Yasuki Nagai

Yasuki Nagai 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: 20230050632
    Abstract: A neutron producing target is irradiated with a deuteron beam accelerated by a deuteron accelerator to generate neutrons, and first samples are directly irradiated with the fast neutrons produced in the neutron producing target. The fast neutrons, which have initially been scattered by a nuclear reaction in the first samples and have passed through the first samples, are multi-scattered by a neutron scattering material made of a light element disposed around the neutron producing target and the first samples to generate, by a nuclear reaction with the first samples and second samples, various radioisotopes in large amounts at the same time from the first samples and the second samples. Thereby, a new RI production technology can generate various radioisotopes in large amounts at the same time.
    Type: Application
    Filed: February 12, 2020
    Publication date: February 16, 2023
    Applicant: CHIYODA TECHNOL CORPORATION
    Inventors: Yasuki NAGAI, Masako KAWABATA
  • Patent number: 10345748
    Abstract: A sliding member includes a first fiber sheet composed of ultrafine fibers composed of a first polymer of a polysulfide-based polymer, a polyimide-based polymer, a polyamide-based polymer or a polyamideimide-based polymer, the ultrafine fiber, when composed of the polyimide-based polymer or the polyamideimide-based polymer, having an average fiber diameter of 0.5 ?m or more and 5 ?m or less, the ultrafine fiber, when composed of the polysulfide-based polymer or the polyamide-based polymer, having an average fiber diameter of 1 ?m or more and 15 ?m or less.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: July 9, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Yasuki Nagai
  • Publication number: 20180173141
    Abstract: A sliding member includes a first fiber sheet composed of ultrafine fibers composed of a first polymer of a polysulfide-based polymer, a polyimide-based polymer, a polyamide-based polymer or a polyamideimide-based polymer, the ultrafine fiber, when composed of the polyimide-based polymer or the polyamideimide-based polymer, having an average fiber diameter of 0.5 ?m or more and 5 ?m or less, the ultrafine fiber, when composed of the polysulfide-based polymer or the polyamide-based polymer, having an average fiber diameter of 1 ?m or more and 15 ?m or less.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 21, 2018
    Inventor: Yasuki NAGAI
  • Patent number: 9857720
    Abstract: A field effect (FE) electric charger device that electrically charges a surface of a charge-target member, the FE electric charger device including: an electric charger element; a power source supplying the electric charger element with current; and a lead electrode generating an electric field upon voltage application and causing the electric charger element to discharge. In the FE electric charger device, the electric charger element has a density no smaller than 0.4 g/cm3, and includes a plurality of filaments each including a plurality of sp2 carbon molecules bonded together.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: January 2, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Yasuki Nagai
  • Patent number: 9835996
    Abstract: A sliding member includes siloxane having a reactive substituent, and a holding member having a group which can react with the substituent and bonds to the substituent to hold the siloxane.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: December 5, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Yasuki Nagai
  • Publication number: 20170139360
    Abstract: A sliding member comprises: siloxane having a reactive substituent; and a holding member having a group which can react with the substituent and bonds to the substituent to hold the siloxane.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 18, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventor: Yasuki NAGAI
  • Publication number: 20170082938
    Abstract: A field effect (FE) electric charger device that electrically charges a surface of a charge-target member, the FE electric charger device including: an electric charger element; a power source supplying the electric charger element with current; and a lead electrode generating an electric field upon voltage application and causing the electric charger element to discharge. In the FE electric charger device, the electric charger element has a density no smaller than 0.4 g/cm3, and includes a plurality of filaments each including a plurality of sp2 carbon molecules bonded together.
    Type: Application
    Filed: September 21, 2016
    Publication date: March 23, 2017
    Inventor: Yasuki NAGAI
  • Patent number: 8236208
    Abstract: An optical cellulose ester film comprising a cellulose ester (A); at least one ester based plasticizer (B) selected from ester based plasticizers composed of a polyhydric alcohol and a univalent carboxylic acid, or ester based plasticizers composed of a polyvalent carboxylic acid and a monohydric alcohol; at least one stabilizer (C) selected from the group consisting of a phenol based stabilizer, a hindered amine based stabilizer, or a phosphorous based stabilizer; and a hydrogen bonding solvent (D).
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: August 7, 2012
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Akihiko Takeda, Kazuto Kiyohara, Satomi Kawabe, Yasuki Nagai, Takayuki Suzuki, Kazuaki Nakamura, Takashi Konishi
  • Patent number: 8012384
    Abstract: A method for manufacturing a polarizing plate protective film including the steps of: 1) mixing a cellulose ester resin and an organic additive to obtain a mixing composition, 2) placing the mixing composition in a mold to obtain an integral molding, and 3) heating to melt the integral molding so as to form the polarizing plate protective film, wherein the integral molding has a size of 1 mm×1 mm×1 mm to 20 mm×20 mm×20 mm, and the cellulose ester resin is contained in the integral molding in a state of particles.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: September 6, 2011
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Yasuki Nagai, Kazuto Kiyohara, Masahiko Yamasaki, Akihiko Takeda
  • Publication number: 20100215137
    Abstract: A radioisotope is produced through any of the following reactions using a target material: (1) (n, 2n) reaction: two-neutron pickup reaction induced by neutrons, (2) (n, 3n) reaction: three-neutron pickup reaction induced by neutrons, (3) (n, n?) reaction: neutron inelastic scattering reaction, (4) (n, p) reaction: one proton-pickup reaction induced by neutrons, (5) (n, np) reaction: one neutron- and one proton-pickup reaction induced by neutrons, (6) (n, 4He) reaction: one 4He-pickup reaction induced by neutrons.
    Type: Application
    Filed: January 19, 2010
    Publication date: August 26, 2010
    Inventors: Yasuki Nagai, Masumi Oshima, Masashi Hashimoto, Yuichi Hatsukawa, Hideo Harada, Tadahiro Kin, Osamu Iwamoto, Nobuyuki Iwamoto, Mariko Segawa, Tikara Konno, Kentaro Ochiai
  • Publication number: 20090081388
    Abstract: An optical cellulose ester film comprising a cellulose ester (A); at least one ester based plasticizer (B) selected from ester based plasticizers composed of a polyhydric alcohol and a univalent carboxylic acid, or ester based plasticizers composed of a polyvalent carboxylic acid and a monohydric alcohol; at least one stabilizer (C) selected from the group consisting of a phenol based stabilizer, a hindered amine based stabilizer, or a phosphorous based stabilizer; and a hydrogen bonding solvent (D).
    Type: Application
    Filed: November 14, 2006
    Publication date: March 26, 2009
    Inventors: Akihiko Takeda, Kazuto Kiyohara, Satomi Kawabe, Yasuki Nagai, Takayuki Suzuki, Kazuaki Nakamura, Takashi Konishi
  • Publication number: 20060060997
    Abstract: A method for manufacturing a polarizing plate protective film including the steps of: 1) mixing a cellulose ester resin and an organic additive to obtain a mixing composition, 2) placing the mixing composition in a mold to obtain an integral molding, and 3) heating to melt the integral molding so as to form the polarizing plate protective film, wherein the integral molding has a size of 1 mm×1 mm×1 mm to 20 mm×20 mm×20 mm, and the cellulose ester resin is contained in the integral molding in a state of particles.
    Type: Application
    Filed: September 7, 2005
    Publication date: March 23, 2006
    Inventors: Yasuki Nagai, Kazuto Kiyohara, Masahiko Yamasaki, Akihiko Takeda
  • Patent number: 6235444
    Abstract: The present invention relates to toner comprising a binder resin and a colorant, wherein the toner is manufactured by a wet-type granulation method using an organic dispersing agent, an aqueous extract liquid having a surface tension of 50 to 72 mN/m at 25° C., the aqueous extract liquid obtained by mixing 1 part-by-weight toner and 50 parts-by-weight distilled water for 1 hour at 80° C.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: May 22, 2001
    Assignee: Minolta Co., Ltd.
    Inventors: Yasuki Nagai, Junji Machida, Yuji Shintani, Mitsutoshi Nakamura
  • Patent number: 6001528
    Abstract: The present invention relates to a process for preparing a toner for electrophotography, which comprises at least the steps of: providing a toner composition solution by mixing a binder resin, a colorant, a charge-control agent and an organic solvent; mixing the resulting toner composition solution with a dispersion solution containing a dispersing agent by utilizing a collision shearing force of beads or using a colloid mill method, thereby obtaining an O/W type emulsion; heating the resulting emulsion so as to eliminate said organic solvent; and obtaining a toner by washing and drying precipitated particles, wherein a viscosity .eta..sub.Z of the toner composition solution and a viscosity .eta..sub.B of the dispersion solution satisfies a specified the relationship between .eta..sub.A and .eta..sub.B.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: December 14, 1999
    Assignee: Minolta Co., Ltd.
    Inventors: Yasuki Nagai, Junji Machida
  • Patent number: 5731120
    Abstract: The present invention provides a carrier comprising:a magnetic core; anda specified coating layer formed onto the surface of the core, said layer comprising a copolymer of a specified organopolysiloxysane with a radical monomer, which may be cured by a curing agent, being excellent in resistance to spent phenomenon, environmental resistance and durability.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: March 24, 1998
    Assignee: Minolta Co., Ltd.
    Inventors: Yukio Tanigami, Ichiro Demizu, Mitsutoshi Nakamura, Yasuki Nagai, Osamu Maeda
  • Patent number: 5698850
    Abstract: Radiation made to enter an entire envelope formed of lead or copper, which is included in a radiation detector, results in generating neutrons. Then, the neutrons enter an NaI (Tl) crystal, a CsI crystal, a BiGeO crystal, a BaF.sub.2 crystal, a GSO (Gd.sub.2 SiO.sub.5) crystal or a GdO crystal, forming a scintillator portion of the radiation detector, and as a result, gamma rays are generated due to a neutron capture reaction. The energy of the gamma rays is measured, thereby detecting the nonuniformity of sensitivity of the scintillator portion of the radiation detector.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: December 16, 1997
    Assignee: President of Tokyo Institute of Technology
    Inventor: Yasuki Nagai
  • Patent number: 5622802
    Abstract: A toner for electrostatic latent image developing comprises a binder resin and a coloring agent. The binder resin is preferably a polyester resin having specified properties. The coloring agent is preferably a C. I. Pigment Blue 15-3, C. I. Pigment Red 122 or C. I. Pigment Yellow 17. The toner is prepared by emulsion dispersion of a colored resin solution, including the binder resin and the coloring agent in a non-water soluble organic solvent, in an aqueous dispersion. Subsequently, the non-water soluble organic solvent and the aqueous dispersion are removed to produce fine toner particles, which are washed, dried and sorted to produce the toner.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 22, 1997
    Assignee: Minolta Co., Ltd.
    Inventors: Ichiro Demizu, Yasuki Nagai, Mitsutoshi Nakamura, Yukio Tanigami, Hideaki Ueda
  • Patent number: 5604067
    Abstract: A resin-formed toner for developing electrostatic latent images manufactured by a wet process, wherein 10 parts by weight of said toner is added to 100 parts by weight of deionized water to produce a solution having electrical conductance of 1.about.100 .mu.S/sec. And a resin-formed toner for developing electrostatic latent images which is manufactured by wet process using a water-insoluble inorganic salt comprising calcium as a dispersion stabilizing agent, wherein the amount of calcium present in the toner is 0.2.about.10 ppm.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: February 18, 1997
    Assignee: Minolta Co., Ltd.
    Inventors: Yasuki Nagai, Hideaki Ueda, Ichiro Demizu, Mitsutoshi Nakamura, Yukio Tanigami
  • Patent number: 5547794
    Abstract: A toner for electrostatic latent image developing containing at least a binder resin, a coloring agent and a charge controller that are dissolved or dispersed in a non-water soluble organic solvent to form an emulsion dispersion of a colored resin solution in aqueous dispersion. The toner of the present invention is produced by forming the emulsion dispersion of a colored resin solution in aqueous dispersion followed by removal of the non-water soluble organic solvent and water to obtain a toner having a residual organic solvent content of about 5 to about 100 ppm and a residual moisture content of about 0.05 to about 1.0 percent-by-weight of total toner weight.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: August 20, 1996
    Assignee: Minolta Co., Ltd.
    Inventors: Ichiro Demizu, Yasuki Nagai, Mitsutoshi Nakamura, Yukio Tanigami, Hideaki Ueda