Patents by Inventor Waka TARORA

Waka TARORA 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).

  • Magnetic iron oxide nanopowder and process for producing the same
    Patent number: 10099941
    Abstract: A magnetic ?-form iron oxide nanopowder is a novel magnetic iron oxide nanopowder having magnetic polarization and spontaneous electric polarization and having physical properties similar to those of half-metals; and a process produces the magnetic nanopowder. The magnetic powder has a composition represented by Fe2O3 and has a crystal structure belonging to the monoclinic system.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: October 16, 2018
    Assignees: THE UNIVERSITY OF TOKYO, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Shin-ichi Ohkoshi, Marie Yoshikiyo, Asuka Namai, Hiroko Tokoro, Waka Tarora, Tomomichi Nasu, Takayuki Yoshida, Manabu Tanaka
  • Iron oxide magnetic nanoparticle powder and method of producing the same, iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and method of producing the same
    Patent number: 9916922
    Abstract: There is provided an iron oxide magnetic nanoparticle powder having a ferromagnetic property even if the particles have an average particle size of 15 nm or less, preferably 10 nm or less, and a method of producing the same, an iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and a method of producing the same, wherein the iron oxide magnetic nanoparticles having an ?-Fe2O3 single phase, having the average particle size of 15 nm or less, and further 10 nm or less, are generated by using ?-FeO(OH) (iron oxide hydroxide) nanoparticles as a starting material, and coating the (iron oxide hydroxide) nanoparticles with silicon oxide, and applying heat treatment thereto under an atmospheric air, and further the iron oxide magnetic nanoparticle thin film is obtained by using the iron oxide magnetic nanoparticles.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: March 13, 2018
    Assignees: The University of Tokyo, Dowa Electronics Materials Co., Ltd.
    Inventors: Shin-ichi Ohkoshi, Marie Yoshikiyo, Asuka Namai, Hiroko Tokoro, Waka Tarora, Takayuki Yoshida, Manabu Tanaka
  • MAGNETIC IRON OXIDE NANOPOWDER AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20170137302
    Abstract: A magnetic ?-form iron oxide nanopowder is a novel magnetic iron oxide nanopowder having magnetic polarization and spontaneous electric polarization and having physical properties similar to those of half-metals; and a process produces the magnetic nanopowder. The magnetic powder has a composition represented by Fe2O3 and has a crystal structure belonging to the monoclinic system.
    Type: Application
    Filed: June 18, 2015
    Publication date: May 18, 2017
    Applicants: THE UNIVERSITY OF TOKYO, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Shin-ichi OHKOSHI, Marie YOSHIKIYO, Asuka NAMAI, Hiroko TOKORO, Waka TARORA, Tomomichi NASU, Takayuki YOSHIDA, Manabu TANAKA
  • IRON OXIDE MAGNETIC NANOPARTICLE POWDER AND METHOD OF PRODUCING THE SAME, IRON OXIDE MAGNETIC NANOPARTICLE THIN FILM CONTAINING THE IRON OXIDE MAGNETIC NANOPARTICLE POWDER AND METHOD OF PRODUCING THE SAME
    Publication number: 20160104560
    Abstract: There is provided an iron oxide magnetic nanoparticle powder having a ferromagnetic property even if the particles have an average particle size of 15 nm or less, preferably 10 nm or less, and a method of producing the same, an iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and a method of producing the same, wherein the iron oxide magnetic nanoparticles having an ?-Fe2O3 single phase, having the average particle size of 15 nm or less, and further 10 nm or less, are generated by using ?-FeO(OH) (iron oxide hydroxide) nanoparticles as a starting material, and coating the (iron oxide hydroxide) nanoparticles with silicon oxide, and applying heat treatment thereto under an atmospheric air, and further the iron oxide magnetic nanoparticle thin film is obtained by using the iron oxide magnetic nanoparticles.
    Type: Application
    Filed: April 24, 2014
    Publication date: April 14, 2016
    Inventors: Shin-ichi OHKOSHI, Marie YOSHIKIYO, Asuka NAMAI, Hiroko TOKORO, Waka TARORA, Takayuki YOSHIDA, Manabu TANAKA