Patents by Inventor Kazumasa Takeuchi

Kazumasa Takeuchi 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: 12053820
    Abstract: A compound for dust core includes a metal powder including iron, a resin composition, and a metal salt, in which the metal salt is represented by R2M, R represents a saturated fatty acid group having 6 or more and 12 or less carbon atoms, and M represents at least one metal element between Ca and Ba.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: August 6, 2024
    Assignee: RESONAC CORPORATION
    Inventors: Arisa Taira, Chio Ishihara, Teruo Itoh, Kosuke Urashima, Kazumasa Takeuchi
  • Publication number: 20240209168
    Abstract: A monomer composition is a monomer composition for impregnating voids in a porous compact. The compact contains a metal powder and a thermosetting resin composition. The monomer composition contains at least one compound selected from the group consisting of an acrylate having a dicyclopentane structure, an acrylate having a dicyclopentene structure, a methacrylate having a dicyclopentane structure, and a methacrylate having a dicyclopentene structure.
    Type: Application
    Filed: April 19, 2021
    Publication date: June 27, 2024
    Inventors: Kazumasa TAKEUCHI, Teruo ITOH, Arisa TAIRA, Kosuke URASHIMA, Hideo MAEDA
  • Publication number: 20240177897
    Abstract: A magnetic powder includes: a plurality of magnetic particles including at least either one of a permanent magnet and a soft magnetic material; a first silicon compound covering at least a portion of the surfaces of the magnetic particles; and a second silicon compound covering at least a portion of the surfaces of the magnetic particles. The first silicon compound includes an alkyl group and silicon bonded to the alkyl group. The second silicon compound includes an alkyl chain, silicon bonded to one end of the alkyl chain, and a glycidyl group located at the other end of the alkyl chain. A number m of carbon atoms of the alkyl chain included in the second silicon compound is larger than a number n of carbon atoms of the alkyl group included in the first silicon compound.
    Type: Application
    Filed: April 15, 2022
    Publication date: May 30, 2024
    Inventors: Kazumasa TAKEUCHI, Arisa TAIRA, Teruo ITOH, Hideo MAEDA, Chio ISHIHARA
  • Patent number: 11732124
    Abstract: A compound comprises a resin composition containing an epoxy resin, a phenol resin, a wax, and an imidazole compound, and a metal element-containing powder, wherein the epoxy resin comprises a crystalline epoxy resin, the wax comprises a montanic acid ester, and the content of the metal element-containing powder is 90 mass % or more based on the total mass of the compound.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: August 22, 2023
    Assignee: RESONAC CORPORATION
    Inventors: Kazumasa Takeuchi, Chio Ishihara, Hideo Maeda, Masahiko Osaka, Takashi Inagaki
  • Publication number: 20230250257
    Abstract: A compound for bonded magnet that increases the mechanical strength (for example, crushing strength) of a bonded magnet is provided. The compound for bonded magnet includes a magnetic powder, an epoxy resin, a curing agent, a coupling agent, and a metal salt, and the metal salt is represented by R2M, in which R represents a saturated fatty acid group having 6 or more and 10 or less carbon atoms, while M represents at least one metal element between Ca and Ba.
    Type: Application
    Filed: July 13, 2021
    Publication date: August 10, 2023
    Inventors: Kazumasa TAKEUCHI, Teruo ITOH, Arisa TAIRA, Kosuke URASHIMA
  • Publication number: 20230191480
    Abstract: A compound for dust core includes a metal powder including iron, a resin composition, and a metal salt, in which the metal salt is represented by R2M, R represents a saturated fatty acid group having 6 or more and 12 or less carbon atoms, and M represents at least one metal element between Ca and Ba.
    Type: Application
    Filed: July 8, 2021
    Publication date: June 22, 2023
    Inventors: Arisa TAIRA, Chio ISHIHARA, Teruo ITOH, Kosuke URASHIMA, Kazumasa TAKEUCHI
  • Publication number: 20200391287
    Abstract: Provided is a compound powder suitable for producing a molded body having a high density. A compound powder 10 includes metal element-containing particles 1 and a resin composition 2 covering the metal element-containing particle 1, in which a melt viscosity of the resin composition 2 at 100° C. is 0.01 Pa·s or more and 10 Pa·s or less.
    Type: Application
    Filed: February 28, 2018
    Publication date: December 17, 2020
    Inventors: Kazumasa TAKEUCHI, Chio ISHIHARA, Hideo MAEDA, Teruo ITOH, Hayato SAWAMOTO, Kohei AIBA
  • Publication number: 20200385566
    Abstract: A compound comprises a resin composition containing an epoxy resin, a phenol resin, a wax, and an imidazole compound, and a metal element-containing powder, wherein the epoxy resin comprises a crystalline epoxy resin, the wax comprises a montanic acid ester, and the content of the metal element-containing powder is 90 mass % or more based on the total mass of the compound.
    Type: Application
    Filed: November 30, 2017
    Publication date: December 10, 2020
    Inventors: Kazumasa TAKEUCHI, Chio ISHIHARA, Hideo MAEDA, Masahiko OSAKA, Takashi INAGAKI
  • Patent number: 10251265
    Abstract: The present invention provides the prepreg being formed by impregnating a fiber base material with a resin composition and the resin composition comprising an acrylic resin, wherein the ratio of the peak height near 2240 cm?1 due to nitrile groups (PCN) with respect to the peak height near 1730 cm?1 due to carbonyl groups (PCO) in the IR spectrum of the cured resin composition (PCN/PCO) is no greater than 0.001 and the like in order to provide a prepreg, a film with a resin, a metal foil with a resin and a metal-clad laminate, which exhibit excellent bending resistance while also prevent ion migration and have excellent insulating reliability when printed wiring boards are fabricated, as well as a printed wiring board employing the same.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: April 2, 2019
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Akiko Kawaguchi, Nozomu Takano, Yasuyuki Mizuno, Kazumasa Takeuchi, Shigeru Haeno, Yoshinori Nagai, Masato Fukui
  • Publication number: 20190062480
    Abstract: Disclosed is a curable resin composition that includes radical polymerizable monomers including a first monofunctional radical polymerizable monomer and a second monofunctional radical polymerizable monomer. The first monofunctional radical polymerizable monomer is a monomer that forms, when polymerized alone, a homopolymer having a glass transition temperature of 20° C. or lower. The second monofunctional radical polymerizable monomer is a monomer that forms, when polymerized alone, a homopolymer having a glass transition temperature of 50° C. or higher.
    Type: Application
    Filed: August 12, 2016
    Publication date: February 28, 2019
    Inventors: Kosuke YOKOYAMA, Kazumasa TAKEUCHI, Toshiaki SHIRASAKA, Bungo OCHIAI, Kazuki CHIBA, Tomonari KIRYU
  • Publication number: 20180237599
    Abstract: Disclosed is a curable resin composition that includes radical polymerizable monomers including a monofunctional radical polymerizable monomer, a linear or branched polymer containing a polyoxyalkylene chain, and a radical polymerization initiator.
    Type: Application
    Filed: August 12, 2016
    Publication date: August 23, 2018
    Inventors: Toshiaki SHIRASAKA, Kosuke YOKOYAMA, Kazumasa TAKEUCHI, Bungo OCHIAI, Kazuki CHIBA, Tomonari KIRYU
  • Publication number: 20180237549
    Abstract: Disclosed is a composite material including a metal material; and a protective material provided on the surface of the metal material, the protective material being a cured product of a curable resin composition. The curable resin composition includes radical polymerizable monomers including a first monofunctional radical polymerizable monomer and a second monofunctional radical polymerizable monomer. The first monofunctional radical polymerizable monomer is a monomer that forms, when polymerized alone, a homopolymer having a glass transition temperature of 20° C. or lower. The second monofunctional radical polymerizable monomer is a monomer that forms, when polymerized alone, a homopolymer having a glass transition temperature of 50° C. or higher.
    Type: Application
    Filed: August 12, 2016
    Publication date: August 23, 2018
    Inventors: Kazumasa TAKEUCHI, Kosuke YOKOYAMA, Toshiaki SHIRASAKA, Bungo OCHIAI, Kazuki CHIBA, Tomonari KIRYU
  • Publication number: 20180098425
    Abstract: The present invention provides the prepreg being formed by impregnating a fiber base material with a resin composition and the resin composition comprising an acrylic resin, wherein the ratio of the peak height near 2240 cm?1 due to nitrile groups (PCN) with respect to the peak height near 1730 cm?1 due to carbonyl groups (PCO) in the IR spectrum of the cured resin composition (PCN/PCO) is no greater than 0.001 and the like in order to provide a prepreg, a film with a resin, a metal foil with a resin and a metal-clad laminate, which exhibit excellent bending resistance while also prevent ion migration and have excellent insulating reliability when printed wiring boards are fabricated, as well as a printed wiring board employing the same.
    Type: Application
    Filed: December 5, 2017
    Publication date: April 5, 2018
    Inventors: Akiko Kawaguchi, Nozomu Takano, Yasuyuki Mizuno, Kazumasa Takeuchi, Shigeru Haeno, Yoshinori Nagai, Masato Fukui
  • Patent number: 9132611
    Abstract: A resin composition comprising a polyamideimide and a polyfunctional glycidyl compound, the polyamideimide having 2 or more carboxyl groups on at least one end of the molecular chain.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: September 15, 2015
    Assignee: HITACHI CHEMICAL CO., LTD.
    Inventor: Kazumasa Takeuchi
  • Patent number: 8664534
    Abstract: It is an object of the present invention to provide a printed circuit board that can be housed at high density in the enclosures of electronic devices. The printed circuit board (40) according to a preferred embodiment of the invention has a construction with a substrate (1), a conductor (7) formed in a flexible region (36) and conductors (8,9) formed in non-flexible regions (46). The conductor (7) formed in the flexible region (36) has a total thickness of 1-30 ?m, and the conductors (8,9) formed in the non-flexible regions (46) have a total thickness of 30-150 ?m.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: March 4, 2014
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Kazumasa Takeuchi, Nozomu Takano, Masaki Yamaguchi, Makoto Yanagida
  • Patent number: 8507100
    Abstract: The invention aims to provide a resin primer which can stick an insulator layer to a conductor foil whereof the surface is not much roughened with sufficient adhesive force, a conductor foil with resin, a laminated sheet and a method of manufacturing same. The resin primer of the invention comprises a resin having film-forming ability and a breaking energy of 0.15 J or more. The conductor foil with resin of the invention comprises a resin layer comprising a conductor foil and the aforesaid resin primer. Further, the laminated sheet of the invention comprises the conductor foil, an insulating layer disposed facing the conductor foil, and a resin layer comprising the aforesaid resin primer disposed between the conductor foil and insulating layer so that it is in contact therewith. This laminated sheet can be manufactured by heating and pressurizing a laminate comprising the aforesaid conductor foil with resin, and a prepreg laminated on this resin layer.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: August 13, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Kenji Tanaka, Kazumasa Takeuchi, Nobuyuki Ogawa, Katsuyuki Masuda
  • Patent number: 8433236
    Abstract: A paper processing apparatus includes: a discharging unit that discharges the paper onto a staple tray; a paper returning unit that reverses the paper discharged by the discharging unit and performs alignment in a conveying direction by abutting the paper against a rear end reference fence; a supporting unit that supports the discharging unit in a state capable of coming in contact with or separating from the paper; a contact and separation unit by which the discharging unit comes in contact with or separates from the paper; and a pressurizing unit that is moved by the contact and separation unit, does not load the discharging unit in a standby state where the discharging unit is held apart from the paper, and applies contact pressure in a state where the discharging unit is in contact with the paper.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: April 30, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Terumitsu Azuma, Shigefumi Soga, Takeshi Hirabayashi, Kentaro Fukami, Daishi Watanabe, Kazumasa Takeuchi, Hiroki Yoshida
  • Publication number: 20120315438
    Abstract: A resin primer which can stick an insulator layer to a conductor foil, whose surface is not much roughened, with sufficient adhesive force, a conductor foil with resin, a laminated sheet and a method of manufacturing the same. The resin primer includes a resin having film-forming ability and a breaking energy of 0.15 J or more. The conductor foil with resin includes a conductor foil and the aforesaid resin primer. The laminated sheet includes the conductor foil, an insulating layer disposed facing the conductor foil, and a resin layer including the aforesaid resin primer disposed between the conductor foil and insulating layer so that it is in contact therewith. This laminated sheet can be manufactured by heating and pressurizing a laminate including the aforesaid conductor foil with resin, and a prepreg laminated on this resin.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 13, 2012
    Inventors: Kenji TANAKA, Kazumasa TAKEUCHI, Nobuyuki OGAWA, Katsuyuki MASUDA
  • Publication number: 20120285732
    Abstract: It is an object of the present invention to provide a multilayer circuit board that can be housed at high density in the enclosures of electronic devices. According to a preferred embodiment of the invention, a multilayer circuit board (12) has a structure wherein non-flexible printed circuit boards (6) are laminated via cover lays (10) onto both sides of a flexible printed circuit board (1). In the multilayer circuit board (12), the cover lays (10) protect the regions of the printed circuit board (1) where the printed circuit boards (6) are not situated, while also functioning as adhesive layers (11) for bonding with the printed circuit boards (6). In other words, the same layers are used as the cover lays (10) and adhesive layers (11) in the multilayer circuit board (12).
    Type: Application
    Filed: July 16, 2012
    Publication date: November 15, 2012
    Inventors: Kazumasa TAKEUCHI, Nozomu Takano, Masaki Yamaguchi, Makoto Yanagida
  • Publication number: 20120244332
    Abstract: A resin composition comprising a polyamideimide and a polyfunctional glycidyl compound, the polyamideimide having 2 or more carboxyl groups on at least one end of the molecular chain.
    Type: Application
    Filed: September 28, 2010
    Publication date: September 27, 2012
    Applicant: HITACHI CHEMICAL COMPANY, LTD
    Inventor: Kazumasa Takeuchi