Patents by Inventor Hiromasa FUJIOKA

Hiromasa FUJIOKA 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: 11932543
    Abstract: Composite oxide fine particles are produced by sol-gel method under conditions in which coarse particles and aggregated particles are unlikely to be generated, and the composite oxide fine particles are further wet-filtered using a filter to remove the coarse particles and the aggregated particles. Then, a salt is added to a dispersion of the composite oxide fine particles to produce weak aggregates of the composite oxide fine particles in the dispersion. A solid content is separated from the dispersion of the composite oxide fine particles containing the aggregates, and then dried. The solid content is easily made finer because no firm aggregates are generated during the drying. That is, composite oxide fine particles containing no coarse particles and aggregated particles are obtained. Use of a known cracking means can further reduce the amount of coarse particles.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: March 19, 2024
    Assignee: TOKUYAMA CORPORATION
    Inventors: Hiromasa Fujioka, Hiroaki Taira, Osamu Tanaka
  • Publication number: 20210009432
    Abstract: Composite oxide fine particles are produced by sol-gel method under conditions in which coarse particles and aggregated particles are unlikely to be generated, and the composite oxide fine particles are further wet-filtered using a filter to remove the coarse particles and the aggregated particles. Then, a salt is added to a dispersion of the composite oxide fine particles to produce weak aggregates of the composite oxide fine particles in the dispersion. A solid content is separated from the dispersion of the composite oxide fine particles containing the aggregates, and then dried. The solid content is easily made finer because no firm aggregates are generated during the drying. That is, composite oxide fine particles containing no coarse particles and aggregated particles are obtained. Use of a known cracking means can further reduce the amount of coarse particles.
    Type: Application
    Filed: March 13, 2019
    Publication date: January 14, 2021
    Inventors: Hiromasa FUJIOKA, Hiroaki TAIRA, Osamu TANAKA
  • Publication number: 20200199371
    Abstract: This surface-treated sol-gel silica is characterized by containing sol-gel silica having an average particle size of 0.05 ?m or more and 2.0 ?m or less as measured by laser diffraction scattering and a surface treatment agent on the surface of the sol-gel silica. In a dispersion produced by dispersing 5 mass % of the sol-gel silica in ethanol by emitting ultrasonic waves at 40W for 10 minutes, the content of particles with particle sizes of 5 ?m or more is 10 ppm or less in a particle number size distribution obtained by a Coulter counter method.
    Type: Application
    Filed: August 29, 2018
    Publication date: June 25, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Hiromasa FUJIOKA, Osamu TANAKA, Hiroaki TAIRA, Naoki MIKAMI, Toshiaki OOTANI