Patents by Inventor Kenji Kosuge

Kenji Kosuge 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).

  • Patent number: 10669432
    Abstract: An insulating coating film obtained by mixing 0.5 parts by mass to 10 parts by mass of a copolymer of a fluoroolefin and an ethylenically unsaturated compound when converted into a solid content with 100 parts by mass in solid content of a mixture composed of a metal phosphate and a specific organic resin or a mixture composed of colloidal silica and a specific organic resin is designed to be provided on a surface of an electrical steel sheet, and in this manner, it is possible to obtain an electrical steel sheet having good corrosion resistance under a wet environment and having good properties related to the insulating coating film such as a space factor and adhesiveness.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: June 2, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Koji Muneda
  • Patent number: 10665372
    Abstract: An electrical steel sheet provides: a steel strip (1) for an electrical steel sheet; and an insulating film (2) formed at a surface of the steel strip (1) and containing metal phosphate and organic resin. At least a part of the metal phosphate includes at least one kind of crystal structure selected from a group consisting of a cubic system, a tetragonal system, a hexagonal system, and an orthorhombic system. The organic resin contains at least one kind selected from a group consisting of an acryl-based resin, an epoxy-based resin, and a polyester resin having a carboxyl group or a hydroxyl group at a surface of an emulsion particle for one part by mass to 50 parts by mass relative to 100 parts by mass of the metal phosphate.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 26, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Hiroyasu Fujii
  • Patent number: 10340065
    Abstract: A treatment solution is applied on a surface of a base iron; and the treatment solution is baked and dried. The treatment solution contains a first component: 100 parts by mass in solid content, and a second component composed of particles of one or more kinds selected from a group consisting of a polyolefin wax, an epoxy resin and an acrylic resin, the particles having an average particle size of 2.0 ?m to 15.0 ?m and a melting point of 60° C. to 140° C.: 5 parts by mass to 45 parts by mass in resin solid content. The first component contains a colloidal silica: 100 parts by mass, and an emulsion of one kind selected from a group consisting of an acrylic resin, an epoxy resin and a polyester resin which have an average particle size of 0.05 ?m to 0.50 ?m, or an emulsion of a mixture or copolymer of two or three kinds selected from the group: 40 parts by mass to 400 parts by mass in resin solid content.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: July 2, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Satoshi Arai, Kiyokazu Ishizuka
  • Publication number: 20180240579
    Abstract: An electrical steel sheet provides: a steel strip (1) for an electrical steel sheet; and an insulating film (2) formed at a surface of the steel strip (1) and containing metal phosphate and organic resin. At least a part of the metal phosphate includes at least one kind of crystal structure selected from a group consisting of a cubic system, a tetragonal system, a hexagonal system, and an orthorhombic system. The organic resin contains at least one kind selected from a group consisting of an acryl-based resin, an epoxy-based resin, and a polyester resin having a carboxyl group or a hydroxyl group at a surface of an emulsion particle for one part by mass to 50 parts by mass relative to 100 parts by mass of the metal phosphate.
    Type: Application
    Filed: April 25, 2018
    Publication date: August 23, 2018
    Applicant: Nippon Steel Corporation
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Hiroyasu Fujii
  • Patent number: 9984801
    Abstract: An electrical steel sheet is provided which is capable of improving heat conductivity. The electrical steel sheet includes: a steel strip (1) for an electrical steel sheet; and an insulating film (2) formed at a surface of the steel strip (1) and containing metal phosphate and organic resin. At least a part of the metal phosphate includes at least one kind of crystal structure selected from a group consisting of a cubic system, a tetragonal system, a hexagonal system, and an orthorhombic system. The organic resin contains at least one kind selected from a group consisting of an acryl-based resin, an epoxy-based resin, and a polyester resin having a carboxyl group or a hydroxyl group at a surface of an emulsion particle for one part by mass to 50 parts by mass relative to 100 parts by mass of the metal phosphate.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: May 29, 2018
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Hiroyasu Fujii
  • Publication number: 20180022927
    Abstract: An electrical steel sheet has an insulating coating on a steel sheet surface. The insulating coating includes one or more selected from an inorganic salt, an oxide, and an organic resin. The insulating coating includes the inorganic salt and/or the oxide in an amount of 50% or more by mass in total based on the total mass of the insulating coating. The insulating coating has a fluorine concentration ranging from 2 ppm to 130 ppm. The insulating coating is free of a chromium compound. The insulating coating of this electrical steel sheet has excellent coating compatibility.
    Type: Application
    Filed: February 2, 2016
    Publication date: January 25, 2018
    Inventors: Kazutoshi TAKEDA, Kenji KOSUGE, Tatsuya TAKASE, Koji MUNEDA
  • Publication number: 20160284455
    Abstract: A treatment solution is applied on a surface of a base iron; and the treatment solution is baked and dried. The treatment solution contains a first component: 100 parts by mass in solid content, and a second component composed of particles of one or more kinds selected from a group consisting of a polyolefin wax, an epoxy resin and an acrylic resin, the particles having an average particle size of 2.0 ?m to 15.0 ?m and a melting point of 60° C. to 140° C.: 5 parts by mass to 45 parts by mass in resin solid content. The first component contains a colloidal silica: 100 parts by mass, and an emulsion of one kind selected from a group consisting of an acrylic resin, an epoxy resin and a polyester resin which have an average particle size of 0.05 ?m to 0.50 ?m, or an emulsion of a mixture or copolymer of two or three kinds selected from the group: 40 parts by mass to 400 parts by mass in resin solid content.
    Type: Application
    Filed: June 10, 2016
    Publication date: September 29, 2016
    Inventors: Kazutoshi TAKEDA, Kenji Kosuge, Satoshi Arai, Kiyokazu Ishizuka
  • Patent number: 8591671
    Abstract: A non-oriented electrical steel sheet contains Cr: 0.3 mass % to 5.3 mass %, Si: 1.5 mass % to 4 mass %, Al: 0.4 mass % to 3 mass %, and W: 0.0003 mass % to 0.01 mass %. A C content is 0.006 mass % or less, a Mn content is 1.5 mass % or less, a S content is 0.003 mass % or less, and a N content is 0.003 mass % or less, and the balance is composed of Fe and inevitable impurities.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: November 26, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Takahide Shimazu, Hotaka Honma, Yousuke Kurosaki, Hisashi Mogi, Kenji Kosuge, Takeaki Wakisaka
  • Publication number: 20130209789
    Abstract: An insulating coating film obtained by mixing 0.5 parts by mass to 10 parts by mass of a copolymer of a fluoroolefin and an ethylenically unsaturated compound when converted into a solid content with 100 parts by mass in solid content of a mixture composed of a metal phosphate and a specific organic resin or a mixture composed of colloidal silica and a specific organic resin is designed to be provided on a surface of an electrical steel sheet, and in this manner, it is possible to obtain an electrical steel sheet having good corrosion resistance under a wet environment and having good properties related to the insulating coating film such as a space factor and adhesiveness.
    Type: Application
    Filed: October 25, 2011
    Publication date: August 15, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Koji Muneda
  • Publication number: 20130115443
    Abstract: An electrical steel sheet (10) is provided with a base iron (1) and an insulating film (2) formed on a surface of the base iron (1). The insulating film (2) contains: a first component: 100 parts by mass, the first component containing: a metal phosphate: 100 parts by mass; and one kind selected from a group consisting of an acrylic resin, an epoxy resin and a polyester resin which have an average particle size of 0.05 ?m to 0.50 ?m, or a mixture or copolymer of two or three kinds selected from the group: 1 part by mass to 50 parts by mass; and a second component composed of dispersion or powder of a fluorine resin having an average particle size of 0.05 ?m to 0.35 ?m: 0.5 parts by mass to 10 parts by mass.
    Type: Application
    Filed: July 15, 2011
    Publication date: May 9, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Kohji Muneda
  • Publication number: 20120321502
    Abstract: A non-oriented electrical steel sheet contains Cr: 0.3 mass % to 5.3 mass %, Si: 1.5 mass % to 4 mass %, Al: 0.4 mass % to 3 mass %, and W: 0.0003 mass % to 0.01 mass %. A C content is 0.006 mass % or less, a Mn content is 1.5 mass % or less, a S content is 0.003 mass % or less, and a N content is 0.003 mass % or less, and the balance is composed of Fe and inevitable impurities.
    Type: Application
    Filed: February 21, 2011
    Publication date: December 20, 2012
    Inventors: Takahide Shimazu, Hotaka Honma, Yousuke Kurosaki, Hisashi Logi, Kenji Kosuge, Takeaki Wakisaka
  • Publication number: 20120171467
    Abstract: An electrical steel sheet (10) is provided with a base iron (1) and an insulating film (2) formed on a surface of the base iron (1). The insulating film (2) includes 100 parts by mass of a first component containing a metal phosphate, and 5 parts by mass to 45 parts by mass of a second component composed of particles of one or more kinds selected from a group consisting of a polyolefin wax, an epoxy resin and an acrylic resin, the particles having an average particle size of 2.0 ?m to 15.0 ?m and a melting point of 60° C. to 140° C.
    Type: Application
    Filed: September 2, 2010
    Publication date: July 5, 2012
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Satoshi Arai, Kiyokazu Ishizuka
  • Publication number: 20120088096
    Abstract: The present invention provides an electromagnetic steel sheet having an insulating coating on a surface of the electromagnetic steel sheet, the insulating coating including: a binder solution solid content containing metal phosphate; and a silica or silicate filler having an average particle diameter in a range of 2.0 ?m to 15.0 ?m and an average specific surface area in a range of 1.0 m2/g to 40.0 m2/g, a content of the silica or silicate filler being 1 to 40 parts by mass relative to 100 parts by mass of the binder solution solid content.
    Type: Application
    Filed: June 14, 2010
    Publication date: April 12, 2012
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Hiroyasu Fujii
  • Publication number: 20110212335
    Abstract: An electrical steel sheet provides: a steel strip (1) for an electrical steel sheet; and an insulating film (2) formed at a surface of the steel strip (1) and containing metal phosphate and organic resin. At least a part of the metal phosphate includes at least one kind of crystal structure selected from a group consisting of a cubic system, a tetragonal system, a hexagonal system, and an orthorhombic system. The organic resin contains at least one kind selected from a group consisting of an acryl-based resin, an epoxy-based resin, and a polyester resin having a carboxyl group or a hydroxyl group at a surface of an emulsion particle for one part by mass to 50 parts by mass relative to 100 parts by mass of the metal phosphate.
    Type: Application
    Filed: November 10, 2009
    Publication date: September 1, 2011
    Inventors: Kazutoshi Takeda, Kenji Kosuge, Tatsuya Takase, Hiroyasu Fujii
  • Patent number: 7214277
    Abstract: A quench solidification method, wherein a steel cast strip having a mean grain size 50 ?m or more is prepared and then the steel cast strip is rolled to produce a non-oriented electrical steel sheet having high magnetic flux density in both L and C directions. However the magnetic flux density reduces when the cold reduction rate exceeds 70%. To avoid this problem the non-oriented electrical steel sheet is manufactured with a ratio of at least 4 of the integrated intensity of the {100} plane for a given sample of steel to the integrated intensity of {100} plane for a “random” sample in which crystal grains have random orientations; and a cold reduction rate of the cold-rolling is between 70% and 85%. The superheating degree of the molten steel can be 70° C. or more.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: May 8, 2007
    Assignee: Nippon Steel Corporation
    Inventors: Yousuke Kurosaki, Takeshi Kubota, Hideaki Yamamura, Takashi Arai, Eiichiro Ishimaru, Yoshihiro Arita, Isao Suichi, Kenji Kosuge
  • Patent number: 7100247
    Abstract: A clip fixing structure in which there is no possibility for producing a frictional scratch at an outer surface of a cylinder when it is fixed. The fixing section formed at the rear part of the clip section is bent along widthwise opposing sides and form to face at the rear surface as seen in a front elevational view of the clip section, and the fixing piece sections are provided with the engaging sections. Then, the clip set section formed at the cylinder is adapted to a forward or rearward size and a width size of the inner space of at least the fixing section, its part is protruded in a protruded shape becoming the fixing reference point where the fixing section is fitted, and both side surfaces of the clip set section corresponding to the engaging sections are provided with the holding sections for fixing and holding the fixing section to the clip set section.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: September 5, 2006
    Assignee: Tokyo Kinzoku Industry Co., Ltd.
    Inventors: Shigeki Fujihara, Kenji Kosuge, Hirozumi Fujiwara
  • Publication number: 20040200548
    Abstract: A quench solidification method, wherein a steel cast strip having a mean grain size 50 &mgr;m or more is prepared and then the steel cast strip is rolled to produce a non-oriented electrical steel sheet having high magnetic flux density in both L and C directions. However the magnetic flux density reduces when the cold reduction rate exceeds 70%. To avoid this problem the non-oriented electrical steel sheet is manufactured with a ratio of at least 4 of the integrated intensity of the {100} plane for a given sample of steel to the integrated intensity of {100} plane for a “random” sample in which crystal grains have random orientations; and a cold reduction rate of the cold-rolling is between 70% and 85%. The superheating degree of the molten steel can be 70° C. or more.
    Type: Application
    Filed: April 8, 2004
    Publication date: October 14, 2004
    Inventors: Yousuke Kurosaki, Takeshi Kubota, Hideaki Yamamura, Takashi Arai, Eiichiro Ishimaru, Yoshihiro Arita, Isao Suichi, Kenji Kosuge
  • Publication number: 20040099777
    Abstract: A clip fixing structure in which there is no possibility for producing a frictional scratch at an outer surface of a cylinder when it is fixed, its fixing is conveniently carried out, its productivity is improved and at the same time a loss of material is restricted, and it can be sufficiently adapted for its fixing to a high-class writing instrument.
    Type: Application
    Filed: October 3, 2003
    Publication date: May 27, 2004
    Applicant: TOKYO KINZOKU INDUSTRY CO., LTD.
    Inventors: Shigeki Fujihara, Kenji Kosuge, Hirozumi Fujiwara
  • Patent number: 6635125
    Abstract: A grain-oriented electrical steel sheet excellent in film and iron loss characteristics. The steel sheet contains up to 0.005% of C, 2.0 to 7.0& Si in terms of weight % and the balance iron and unavoidable impurities. An oxide film which mainly contains forsterite is formed on the surface and an insulating coating is formed on the oxide film. The peak intensity of Si obtained by glow discharge spectral analysis (GDS analysis) from the oxide film surface is at least ½ of that of Al, and the depth of the peak position of Si from the oxide film surface us up to {fraction (1/10)} of the depth of that of Al. The sheet satisfies the formulas for a ratio y(%) with which peeling of the oxide film does not take place when subjected to a bending test with a curvature of 20 mm and for core loss characteristic W (W/kg): y(%)≧−122.45t+112.55 W (W/kg)≦2.37t+0.280 wherein t represents a sheet thickness in terms of mm.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: October 21, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Kenji Kosuge, Kishio Mochinaga, Eiichi Nanba, Nobuo Tachibana, Shinya Ishii, Naoki Yagi
  • Publication number: 20020139444
    Abstract: The present invention provides a grain-oriented electrical steel sheet excellent in film characteristics and iron loss characteristics, a process for producing the same and a decarburization annealing facility used for the process.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 3, 2002
    Applicant: Nippon Steel Corporation
    Inventors: Kenji Kosuge, Kishio Mochinaga, Eiichi Nanba, Nobuo Tachibana, Shinya Ishii, Naoki Yagi