Patents by Inventor Masaru Itakura

Masaru Itakura 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).

  • R-T-B-based sintered magnet
    Patent number: 11735341
    Abstract: The present invention relates to an R-T-B-based sintered magnet including: a rare earth element R; a metal element T which is Fe, or includes Fe and Co with which a part of Fe is substituted; boron; and a boride forming element M which is a metal element other than rare earth elements and the metal element T and forms a boride, in which the R-T-B-based sintered magnet includes: a main phase which includes a crystal grain of an R-T-B-based alloy; and a boride phase which includes a compound phase based on the boride of the boride forming element M, and is generated on a preferential growth plane of the crystal grain of the main phase.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: August 22, 2023
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Michihide Nakamura, Masaru Itakura
  • Rare earth thin film magnet, process for producing same, and target for forming rare earth thin film magnet
    Patent number: 11250976
    Abstract: The present invention provides a rare earth thin film magnet having Nd, Fe, and B as essential components, wherein the rare earth thin film magnet has a texture in which an ?-Fe phase and a Nd2Fe14B phase are alternately arranged three-dimensionally, and each phase has an average crystal grain size of 10 to 30 nm. An object of this invention is to provide a rare earth thin film magnet having superior mass productivity and reproducibility and favorable magnetic properties, as well as to provide the production method thereof and a target for producing the thin film.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: February 15, 2022
    Assignee: JX Nippon Mining & Metals Corporation
    Inventors: Masaki Nakano, Hirotoshi Fukunaga, Takeshi Yanai, Masaru Itakura, Hironobu Sawatari
  • R-T-B-BASED SINTERED MAGNET
    Publication number: 20200075202
    Abstract: The present invention relates to an R-T-B-based sintered magnet including: a rare earth element R; a metal element T which is Fe, or includes Fe and Co with which a part of Fe is substituted; boron; and a boride forming element M which is a metal element other than rare earth elements and the metal element T and forms a boride, in which the R-T-B-based sintered magnet includes: a main phase which includes a crystal grain of an R-T-B-based alloy; and a boride phase which includes a compound phase based on the boride of the boride forming element M, and is generated on a preferential growth plane of the crystal grain of the main phase.
    Type: Application
    Filed: August 26, 2019
    Publication date: March 5, 2020
    Inventors: Michihide Nakamura, Masaru Itakura
  • RARE EARTH THIN FILM MAGNET, PROCESS FOR PRODUCING SAME, AND TARGET FOR FORMING RARE EARTH THIN FILM MAGNET
    Publication number: 20160343482
    Abstract: The present invention provides a rare earth thin film magnet having Nd, Fe, and B as essential components, wherein the rare earth thin film magnet has a texture in which an ?-Fe phase and a Nd2Fe14B phase are alternately arranged three-dimensionally, and each phase has an average crystal grain size of 10 to 30 nm. An object of this invention is to provide a rare earth thin film magnet having superior mass productivity and reproducibility and favorable magnetic properties, as well as to provide the production method thereof and a target for producing the thin film.
    Type: Application
    Filed: March 3, 2015
    Publication date: November 24, 2016
    Applicant: JX Nippon Mining & Metals Corporation
    Inventors: Masaki Nakano, Hirotoshi Fukunaga, Takeshi Yanai, Masaru Itakura, Hironobu Sawatari