Patents by Inventor Sho KUWAHARA

Sho KUWAHARA 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).

  • Mn ferrite powder, resin composition, electromagnetic wave shielding material, electronic material, and electronic component
    Patent number: 11952286
    Abstract: Provided are: an Mn ferrite powder characterized by including a plurality of ferrite particles, having a volume-average particle diameter of 1-10 ?m, and having a 2.106 ?m volume-based cumulative distribution (sieved) of 0.1-50.0 vol %; and a resin composition characterized by including said powder and a resin material.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: April 9, 2024
    Assignee: POWDERTECH CO., LTD.
    Inventors: Koji Aga, Takashi Kojima, Kazutaka Ishii, Tetsuya Igarashi, Sho Kuwahara
  • FERRITE POWDER AND METHOD OF PRODUCING THE SAME
    Publication number: 20230085745
    Abstract: Provided are a ferrite powder capable of maintaining a high withstand voltage even when used in a resin composition having high magnetic properties and electrical resistivity and a high filling ratio, and a method for producing the same. A ferrite powder composed of spherical ferrite particles, wherein the ferrite powder contains iron (Fe): 55.0-70.0 mass % and manganese (Mn): 3.5-18.5 mass %, the ferrite powder containing more than 0.0 mass % to 7.5 mass % ?-Fe2O3, and the ferrite powder has a volume average particle size (D50) of 15.0 ?m or less.
    Type: Application
    Filed: January 27, 2021
    Publication date: March 23, 2023
    Inventors: Koji AGA, Takashi KOJIMA, Takao SUGIURA, Sho KUWAHARA, Satomi KONNO, Tadashi TSUDUKI
  • FERRITE POWDER, FERRITE RESIN COMPOSITE MATERIAL, AND ELECTROMAGNETIC SHIELDING MATERIAL, ELECTRONIC MATERIAL, OR ELECTRONIC COMPONENT
    Publication number: 20220340444
    Abstract: Provided are: a ferrite powder whereby, when the ferrite powder is applied in a composite material, dropping out of ferrite particles is suppressed without moldability and filling ability being compromised; a ferrite resin composite material; and an electromagnetic shielding material, an electronic material, or an electronic component. This ferrite powder includes at least spherical or polyhedral ferrite particles in which a step structure is provided on surfaces thereof, the step structure having a polyhedral outline in the surfaces of the ferrite particles.
    Type: Application
    Filed: October 7, 2020
    Publication date: October 27, 2022
    Inventors: Koji AGA, Takashi KOJIMA, Takao SUGIURA, Tadashi TSUDUKI, Satomi KONNO, Sho KUWAHARA
  • MN FERRITE POWDER, RESIN COMPOSITION, ELECTROMAGNETIC WAVE SHIELDING MATERIAL, ELECTRONIC MATERIAL, AND ELECTRONIC COMPONENT
    Publication number: 20210047200
    Abstract: Provided are: an Mn ferrite powder characterized by including a plurality of ferrite particles, having a volume-average particle diameter of 1-10 ?m, and having a 2.106 ?m volume-based cumulative distribution (sieved) of 0.1-50.0 vol %; and a resin composition characterized by including said powder and a resin material.
    Type: Application
    Filed: February 6, 2019
    Publication date: February 18, 2021
    Applicant: POWDERTECH CO., LTD.
    Inventors: Koji AGA, Takashi KOJIMA, Kazutaka ISHII, Tetsuya IGARASHI, Sho KUWAHARA