Patents by Inventor Kazumasa Fujimura

Kazumasa Fujimura 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: 11328845
    Abstract: The present invention relates to an RFeB-based magnet in which a treatment (grain boundary diffusion treatment) for diffusing atoms of the heavy rare earth element RH is performed in a base material including an RLFeB-based sintered magnet obtained by subjecting crystal grains in a raw-material powder including a powder of an RLFeB-based alloy containing the light rare earth element RL, Fe and B to orientation in a magnetic field and then sintering the oriented raw-material powder, or an RLFeB-based hot-deformed magnet obtained by subjecting the same raw-material powder to hot pressing and then to hot deforming to thereby orient the crystal grains in the raw-material powder, and a method for producing the RFeB-based magnet.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: May 10, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Jumpei Hinata, Hayato Hashino, Fumiya Kitanishi, Kazuya Gomi, Kazumasa Fujimura
  • Patent number: 11295880
    Abstract: The present invention relates to an RFeB-based magnet in which a treatment (grain boundary diffusion treatment) for diffusing atoms of the heavy rare earth element RH is performed in a base material including an RLFeB-based sintered magnet obtained by subjecting crystal grains in a raw-material powder including a powder of an RLFeB-based alloy containing the light rare earth element RL, Fe and B to orientation in a magnetic field and then sintering the oriented raw-material powder, or an RLFeB-based hot-deformed magnet obtained by subjecting the same raw-material powder to hot pressing and then to hot deforming to thereby orient the crystal grains in the raw-material powder, and a method for producing the RFeB-based magnet.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: April 5, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Jumpei Hinata, Hayato Hashino, Fumiya Kitanishi, Kazuya Gomi, Kazumasa Fujimura
  • Publication number: 20180374617
    Abstract: The present invention relates to an RFeB-based magnet in which a treatment (grain boundary diffusion treatment) for diffusing atoms of the heavy rare earth element RH is performed in a base material including an RLFeB-based sintered magnet obtained by subjecting crystal grains in a raw-material powder including a powder of an RLFeB-based alloy containing the light rare earth element RL, Fe and B to orientation in a magnetic field and then sintering the oriented raw-material powder, or an RLFeB-based hot-deformed magnet obtained by subjecting the same raw-material powder to hot pressing and then to hot deforming to thereby orient the crystal grains in the raw-material powder, and a method for producing the RFeB-based magnet.
    Type: Application
    Filed: June 25, 2018
    Publication date: December 27, 2018
    Inventors: Jumpei HINATA, Hayato Hashino, Fumiya Kitanishi, Kazuya Gomi, Kazumasa Fujimura
  • Patent number: 6251510
    Abstract: There is provided a process for preparing a resin sheet for thermoforming which can be fabricated into containers and lids or caps for containers in the food packaging industries, particularly those which are resistant to heating in a microwave oven, which containers and lids or caps are excellent in transparency, antifog property, impact resistance, and heat resistance are obtained. A process for preparing an antifogged sheet comprising a propylene resin sheet with an antifogging agent comprising a polyglycerol fatty acid ester or a sucrose fatty acid ester as an effective ingredient.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: June 26, 2001
    Assignee: Japan Polychem Corporation
    Inventors: Yoshinobu Nagaoka, Akihiko Egashira, Kazumasa Fujimura, Toshimitsu Hasegawa, Tomokazu Hirose, Hiroshi Kuzui, Toru Tagawa
  • Patent number: 5757681
    Abstract: An electronic apparatus with an input pen is provided with an apparatus main body wherein the input pen is housed, and a hard cover which is attached to the apparatus main body in a covering manner so as to be freely opened and closed. The apparatus main body is provided with a lock button that is pressed from outside toward inside, a pressing member that presses and urges the inside end of the housed input pen outwardly, an engaging member that engages the hard cover in its closed state, a cover holding member that releases the engagement where it is shifted, and a pen holding member that engages the input pen. Here, the lock button is connected to the pen holding member, and the cover holding member is placed with a space to the inside end face of the lock button so that, when the lock button has been shifted until there is no space left, it is pressed by the lock button.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: May 26, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Suzuki, Kazumasa Fujimura
  • Patent number: 5714531
    Abstract: A propylene resin extruded article comprising 100 parts by weight of a propylene resin, 0.03 to 2 parts by weight of a metal salt of a rosin compound, 0.01 to 1 part by weight of a tertiary amine light stabilizer, and 0.01 to 0.5 part by weight of an aromatic phosphite and/or phosphonite antioxidant, and a propylene resin extruded article further comprising 0.01 to 0.5 part by weight of an antistatic agent in addition to the above components. The resin compound comprising the above components does not contaminate extrusion equipment, and the extruded articles are excellent in transparency, hue, thermal aging resistance and, when the antistatic agent is used, are excellent in antistatic property.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: February 3, 1998
    Assignee: Japan Polychem Corporation
    Inventors: Kazumasa Fujimura, Hitoshi Inagaki
  • Patent number: 4567089
    Abstract: A propylene polymer laminated sheet is described, comprising at least two layers wherein at least one surface layer is Layer A comprising 95% by weight or more of a specific crystalline propylene polymer and up to 5% by weight of an inorganic or organic nucleating agent, the thickness of Layer A being from 0.5 to 45% of the total thickness of the sheet, and at least one other layer is Layer B comprising from 40 to 95 parts by weight of a resin component and from 60 to 5 parts by weight of an inorganic filler, the resin component comprising from 5 to 85% by weight of a specific crystalline propylene polymer and from 95 to 15% by weight of an ethylene polymer, the thickness of Layer B being from 55 to 99.5% of the total thickness of the sheet. This sheet has excellent deep drawing properties and can produce a product having excellent surface gloss, appearance and impact resistance.
    Type: Grant
    Filed: July 23, 1984
    Date of Patent: January 28, 1986
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Satoru Hattori, Takao Yazaki, Kazuhide Hattori, Koji Nishida, Hideki Hattori, Kazumasa Fujimura