Patents by Inventor Atsuhisa IIDA

Atsuhisa IIDA 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).

  • Gas injection nozzle refractory and gas injection nozzle
    Patent number: 11821691
    Abstract: A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO—C central refractory with a small metal tube buried therein, and a MgO—C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding all buried small metal tubes, R mm being a radius of the virtual circle.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: November 21, 2023
    Assignees: JFE STEEL CORPORATION, SHINAGAWA REFRACTORIES CO., LTD.
    Inventors: Seiji Hosohara, Atsuhisa Iida, Atsushi Torigoe, Ryoma Fujiyoshi
  • GAS INJECTION NOZZLE REFRACTORY AND GAS INJECTION NOZZLE
    Publication number: 20220003500
    Abstract: A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO-C central refractory with a small metal tube buried therein, and a MgO-C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding all buried small metal tubes, R mm being a radius of the virtual circle.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 6, 2022
    Applicants: JFE STEEL CORPORATION, SHINAGAWA REFRACTORIES CO., LTD.
    Inventors: Seiji HOSOHARA, Atsuhisa IIDA, Atsushi TORIGOE, Ryoma FUJIYOSHI