Patents by Inventor Yoshiaki Koga

Yoshiaki Koga 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: 20210070894
    Abstract: Conventionally, a photocurable composition to which an ultraviolet absorber is added is difficult to form a colorless and transparent cured resin because the ultraviolet absorber itself is colored, and thus the photocurable composition is hardly to be used in a display apparatus required for colorlessness and transparency. Provided is a photocurable composition including a specific compound, wherein a light transmittance of 385 nm is 50% or less and a yellowness index is 3.0 or less in a state in which a cured resin having a thickness of 200 ?m or less is interposed between alkali free glass plates each having a thickness of 0.7 mm.
    Type: Application
    Filed: August 31, 2018
    Publication date: March 11, 2021
    Applicant: THREEBOND CO., LTD.
    Inventors: Kazuyuki UENO, Yoshihide ARAI, Yoshiaki KOGA
  • Patent number: 9562172
    Abstract: An object of the present invention is to provide a photocurable sheet-type adhesive composition for optical use, which is used for bonding cover glass and a touch panel, a touch panel and a display module, or the like, and has high appearance reliability and storage stability even under high temperature and high humidity. The present invention is a photocurable sheet-shape adhesive for optical use, which contains the following components (A) to (D): (A) 100 parts by mass of a urethane (meth)acrylate oligomer having a weight average molecular weight of 20,000 to 100,000; (B) 3 to 70 parts by mass of a phenoxy resin having a glass transition temperature of 50 to 120° C.; (C) 0.1 to 10 parts by mass of a photopolymerization initiator; and (D) 1 to 50 parts by mass of a (meth)acrylate monomer which has 8 to 30 repeated blocks having an ether linkage in the molecule and containing at least one (meth)acryloyl group in the molecule.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 7, 2017
    Assignee: THREE BOND FINE CHEMICAL CO., LTD.
    Inventors: Yoshiaki Koga, Yoshihide Arai, Takashi Nemoto
  • Publication number: 20150024218
    Abstract: An object of the present invention is to provide a photocurable sheet-type adhesive composition for optical use, which is used for bonding cover glass and a touch panel, a touch panel and a display module, or the like, and has high appearance reliability and storage stability even under high temperature and high humidity. The present invention is a photocurable sheet-shape adhesive for optical use, which contains the following components (A) to (D): (A) 100 parts by mass of a urethane (meth)acrylate oligomer having a weight average molecular weight of 20,000 to 100,000; (B) 3 to 70 parts by mass of a phenoxy resin having a glass transition temperature of 50 to 120° C.; (C) 0.1 to 10 parts by mass of a photopolymerization initiator; and (D) 1 to 50 parts by mass of a (meth)acrylate monomer which has 8 to 30 repeated blocks having an ether linkage in the molecule and containing at least one (meth)acryloyl group in the molecule.
    Type: Application
    Filed: February 14, 2013
    Publication date: January 22, 2015
    Inventors: Yoshiaki Koga, Yoshihide Arai, Takashi Nemoto
  • Patent number: 7988866
    Abstract: In a process for treatment of powdery fumed silica, fumed silica to be discarded is collected by dispersing the fumed silica in water. Disclosed is a method for treatment of a fumed silica-containing wastewater collected in the process. The method comprises the steps of: adding an inorganic coagulant containing a metal to a fumed silica-containing wastewater in an amount of 15 to 300 mg/l. in terms of the metal, wherein the wastewater is either a wastewater containing fumed silica at a concentration of 0.05 to 3.0% by mass or a wastewater whose fumed silica content is adjusted to 0.05 to 3.0% by mass; and adding an organic polymeric coagulant to the mixture.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: August 2, 2011
    Assignee: Tokuyama Corporation
    Inventors: Shinji Tokunaga, Yoshiaki Koga, Toshihiko Inoue
  • Patent number: 7988867
    Abstract: A method of treating silicon powder-containing drainage water, comprising the steps of: including an inorganic flocculant composed of a silica sol-water-soluble metal salt having a molar ratio of silicon to metal of 0.05 to 3.0 into drainage water containing silicon powders to ensure that the metal concentration becomes 15 to 300 mg/L; and adding an organic polymer flocculant. In this method, the coagulation treatment of drainage water containing fine silicon powders can be carried out.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: August 2, 2011
    Assignee: Tokuyama Corporation
    Inventors: Shinji Tokunaga, Yoshiaki Koga, Toshihiko Inoue
  • Publication number: 20090242491
    Abstract: A method of treating silicon powder-containing drainage water, comprising the steps of: including an inorganic flocculant composed of a silica sol-water-soluble metal salt having a molar ratio of silicon to metal of 0.05 to 3.0 into drainage water containing silicon powders to ensure that the metal concentration becomes 15 to 300 mg/L; and adding an organic polymer flocculant. In this method, the coagulation treatment of drainage water containing fine silicon powders can be carried out.
    Type: Application
    Filed: August 17, 2006
    Publication date: October 1, 2009
    Inventors: Shinji Tokunaga, Yoshiaki Koga, Toshihiko Inoue
  • Patent number: 7504001
    Abstract: The objective of the present invention is to provide a papermaking method that can enhance the retention in the papermaking steps. This invention provides a method including making paper by adding to pulp slurry a silica sol which is prepared through a reaction between an aqueous solution of sodium silicate and a mineral acid, and which has, under a SiO2 concentration from 15 to 50 g/L wherein the value of the concentration is shown by [C], a viscosity from 0.12×[C] mPa·s to 15 mPa·s measured at 25° C, and a cationic component and/or an amphoteric component.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: March 17, 2009
    Assignees: Seiko PMC Corporation, Tokuyama Corporation
    Inventors: Masanori Kosuga, Masatomi Ogawa, Yoshiaki Koga
  • Publication number: 20080264871
    Abstract: In a process for treatment of powdery fumed silica, fumed silica to be discarded is collected by dispersing the fumed silica in water. Disclosed is a method for treatment of a fumed silica-containing wastewater collected in the process. The method comprises the steps of: adding an inorganic coagulant containing a metal to a fumed silica-containing wastewater in an amount of 15 to 300 mg/l. in terms of the metal, wherein the wastewater is either a wastewater containing fumed silica at a concentration of 0.05 to 3.0% by mass or a wastewater whose fumed silica content is adjusted to 0.05 to 3.0% by mass; and adding an organic polymeric coagulant to the mixture.
    Type: Application
    Filed: August 17, 2006
    Publication date: October 30, 2008
    Applicant: Tokuyana Corporation
    Inventors: Shinji Tokunaga, Yoshiaki Koga, Toshihiko Inoue
  • Patent number: 7338617
    Abstract: The invention provides metal-silica polymeric flocculants having high coagulation performance which are used for water treatment, particularly to remove suspended materials and other impurities from irrigation water, waste water or the like. A silica sol having a SiO2 concentration of from 100 to 200 g/L and a viscosity of less than 6 cp is prepared by colliding an inorganic acid aqueous solution with a silicate aqueous solution at each rate of 5 m/sec or more. The silica sol is aged to make an aged silica sol having a viscosity of 6 to 30 cp, and the aged silica sol is mixed with a water-soluble metal salt such as ferric chloride, to prepare the flocculants.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: March 4, 2008
    Assignee: Tokuyama Corporation
    Inventors: Yoshiaki Koga, Takao Hasegawa, Hiroyuki Ookubo
  • Publication number: 20070181506
    Abstract: There is provided a method for treating papermaking waste water, which comprises having a silica-aluminum based inorganic polymer flocculant having an Si/Al molar ratio of 0.2 to 1.5 contained in papermaking waste water having a pH or adjusted pH of 5 to 14 such that the concentration of the inorganic polymer flocculant becomes 1 to 250 (mg-Al/L) in terms of aluminum to control the pH of the papermaking waste water to 5 to 8 and then adding an organic polymer flocculant. The method for treating papermaking waste water has high suspended material flocculation efficiency and can flocculate suspended materials without leaving fine suspended materials and produce a flocculated precipitate which can be recycled as a valuable resource.
    Type: Application
    Filed: February 25, 2005
    Publication date: August 9, 2007
    Inventors: Yoshiaki Koga, Kazuhiko Munemasa
  • Publication number: 20060011317
    Abstract: The objective of the present invention is to provide a papermaking method that can enhance the retention in the papermaking steps. This invention provides a method including making paper by adding to pulp slurry a silica sol which is prepared through a reaction between an aqueous solution of sodium silicate and a mineral acid, and which has, under a SiO2 concentration from 15 to 50 g/L wherein the value of the concentration is shown by [C], a viscosity from 0.12×[C] mPa.s to 15 mPa.s measured at 25° C., and a cationic component and/or an amphoteric component.
    Type: Application
    Filed: March 31, 2003
    Publication date: January 19, 2006
    Inventors: Masanori Kosuga, Masatomi Ogawa, Yoshiaki Koga
  • Publication number: 20050121377
    Abstract: An apparatus for preparing a flocculant for water treatment, comprising: (a) a storage tank for an inorganic acid aqueous solution, (b) a storage tank for a silicate aqueous solution, (c) a storage tank for a metal salt aqueous solution, (d) a collision device for preparing a silica sol by colliding the inorganic acid aqueous solution stored in the inorganic acid aqueous solution storage tank with the silicate aqueous solution stored in the silicate aqueous solution storage tank at each rate of 5 m/sec or more, (e) a stirring and aging device for aging the silica sol obtained by the collision with stirring and (f) a feeding device for feeding the metal salt aqueous solution stored in the metal salt aqueous solution storage tank in order to mix the metal salt aqueous solution with the silica sol drawn from the stirring and aging device.
    Type: Application
    Filed: January 18, 2005
    Publication date: June 9, 2005
    Inventors: Yoshiaki Koga, Takao Hasegawa, Hiroyuki Ookubo
  • Patent number: 6814135
    Abstract: A widthwise one half portion of a core section 5a is constituted by a first section 20 formed by stacking a plurality of first elements having first and second linear channels 34 and 35 inside them and fins, and a widthwise other half portion thereof is similarly constituted by a second section 21 formed by stacking a plurality of second elements respectively having U-shaped channels 46 inside them and fins. The number of times the refrigerant fed into a thicknesswise one half portion on an inlet tank 47 side of the first section 20 is turned back in an opposite direction concerning a longitudinal direction of the first linear channels 34 inside this thicknesswise one half portion is made more numerous than the number of times the refrigerant fed into a thicknesswise other half portion on an outlet tank 52 side of the first section 20 is turned back in the opposite direction concerning the longitudinal direction of the second linear channels 35 inside this thicknesswise other half portion.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: November 9, 2004
    Assignee: Calsonic Kansei Corporation
    Inventors: Mitsunari Narahara, Yoshihiro Sasaki, Kazuhiro Kojima, Toru Asanuma, Yoshiaki Koga
  • Publication number: 20030070797
    Abstract: A widthwise one half portion of a core section 5a is constituted by a first section 20 formed by stacking a plurality of first elements having first and second linear channels 34 and 35 inside them and fins, and a widthwise other half portion thereof is similarly constituted by a second section 21 formed by stacking a plurality of second elements respectively having U-shaped channels 46 inside them and fins. The number of times the refrigerant fed into a thicknesswise one half portion on an inlet tank 47 side of the first section 20 is turned back in an opposite direction concerning a longitudinal direction of the first linear channels 34 inside this thicknesswise one half portion is made more numerous than the number of times the refrigerant fed into a thicknesswise other half portion on an outlet tank 52 side of the first section 20 is turned back in the opposite direction concerning the longitudinal direction of the second linear channels 35 inside this thicknesswise other half portion.
    Type: Application
    Filed: September 26, 2001
    Publication date: April 17, 2003
    Applicant: CALSONIC KANSEI CORPORATION
    Inventors: Mitsunari Narahara, Yoshihiro Sasaki, Kazuhiro Kojima, Toru Asanuma, Yoshiaki Koga
  • Publication number: 20030019815
    Abstract: The invention intends to provide metal-silica polymeric flocculants having high coagulation performance which are used for water treatment, particularly used to remove suspended materials and other impurities from irrigation water, waste water or the like, and can be stably prepared at low cost industrially.
    Type: Application
    Filed: May 24, 2002
    Publication date: January 30, 2003
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yoshiaki Koga, Takao Hasegawa, Hiroyuki Ookubo
  • Patent number: 6431265
    Abstract: The height of a bead opposing a joint where side edges of a plate are to be joined is set to be smaller than the height of a bead which does not oppose the joint by the thickness of the plate. Further, lands are provided between the beads and protrude from either the tube surface or the tube surface toward the inside of the main tube unit, and flow gaps are formed through which the heat-exchange medium flows over the lands.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: August 13, 2002
    Assignee: Calsonic Kansei Corporation
    Inventors: Masayoshi Shinhama, Junichi Hiyama, Hiroyuki Tamura, Shinya Kaneko, Enichi Ishiwa, Yoshihiro Sasaki, Yoshiaki Koga
  • Publication number: 20010045277
    Abstract: The height of a bead opposing a joint where side edges of a plate are to be joined is set to be smaller than the height of a bead which does not oppose the joint by the thickness of the plate. Further, lands are provided between the beads and protrude from either the tube surface or the tube surface toward the inside of the main tube unit, and flow gaps are formed through which the heat-exchange medium flows over the lands.
    Type: Application
    Filed: July 5, 2001
    Publication date: November 29, 2001
    Inventors: Masayoshi Shinhama, Junichi Hiyama, Hiroyuki Tamura, Shinya Kaneko, Enichi Ishiwa, Yoshihiro Sasaki, Yoshiaki Koga
  • Patent number: 6267177
    Abstract: The height of a bead opposing a joint where side edges of a plate are to be joined is set to be smaller than the height of a bead which does not oppose the joint by the thickness of the plate. Further, lands are provided between the beads and protrude from either the tube surface or the tube surface toward the inside of the main tube unit, and flow gaps are formed through which the heat-exchange medium flows over the lands.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: July 31, 2001
    Assignee: Calsonic Kansei Corporation
    Inventors: Masayoshi Shinhama, Junichi Hiyama, Hiroyuki Tamura, Shinya Kaneko, Enichi Ishiwa, Yoshihiro Sasaki, Yoshiaki Koga
  • Patent number: 6230787
    Abstract: A stack type evaporator for use in an automotive air conditioner comprises generally a first mass which includes first heat exchanging elements, each first heat exchanging element having mutually independent first and second passages; and a second mass which includes second heat exchanging elements, each second heat exchanging element having a generally U-shaped third passage which has first and second ends. The second mass is arranged beside the first mass in such a manner that the first and second heat exchanging elements are aligned on a common axis. An inlet tank passage connects to upper ends of the first passages. An upstream tank passage connects to lower ends of the first passages and the first ends of the third passages. A downstream tank passage connects to lower ends of the second passages and the second ends of the third passages. An outlet tank passage connects to upper ends of the second passages. An inlet pipe connects to the inlet tank passage.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: May 15, 2001
    Assignee: Calsonic Kansei Corporation
    Inventors: Yoshiaki Koga, Mitsunari Narahara, Toru Asanuma
  • Patent number: 5555739
    Abstract: A cooler unit housing is located in a passenger room near a dashboard of a motor vehicle. A piping arrangement of the cooler unit comprises a pipe joint which is positioned at and supported by an opening of the dashboard. The pipe joint has a first face facing toward the passenger room and a second face facing toward the engine room. An expansion valve unit is connected to the first face of the pipe joint. Coolant inlet and output pipes are arranged, each having one end connected to an evaporator in the cooler unit housing and the other end led to the expansion valve unit. A grommet is disposed between a peripheral portion of the opening and an outer wall portion of the pipe joint thereby to establish sealing therebetween.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 17, 1996
    Assignee: Calsonic Corporation
    Inventors: Toshisada Kujirai, Kaoru Ito, Yoshiaki Koga, Yutaka Moriyama, Norimitsu Takeshita, Yuji Ohira, Takahiro Ono