Patents by Inventor Haruyuki ISHII

Haruyuki ISHII 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: 11231414
    Abstract: To provide magnetic composite particles which can be separated from a sample solution in a short period of time using magnetism, and furthermore, have an excellent dispersion stability in the sample solution, which are magnetic composite particles in which an outer shell is formed on surfaces of core particles containing an inorganic oxide or a polymer, wherein the outer shell comprises magnetic nanoparticles and a silicon compound, the value of the volume average particle diameter (dTEM) of the magnetic composite particles measured by a transmission electron microscope is 30 nm or more to 210 nm or less, and the value of (dDLS)/(dTEM) which is the ratio of the value of the particle diameter (dDLS) of the particles measured by a dynamic light scattering method and the value of the volume average particle diameter (dTEM) is 2.0 or less.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: January 25, 2022
    Assignees: TOHOKU UNIVERSITY, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Daisuke Nagao, Mikio Konno, Haruyuki Ishii, Kumiko Hayashi, Natsuki Kohama, Takayuki Yoshida, Toshihiko Ueyama
  • Publication number: 20210316997
    Abstract: An object of the present disclosure is to provide a method for producing a core-shell porous silica particle with an increased thickness of the shell. The object is met by a method for producing a core-shell porous silica particle, the method including the following steps: (a) preparing; (b) forming a shell precursor; (c) forming a shell; (d) preparing; (e) forming a shell precursor; and (f) forming a shell; wherein the steps (d) through (f) are further repeated one to three times, in which case the step of forming a shell described in step (d) refers to step (f).
    Type: Application
    Filed: August 13, 2019
    Publication date: October 14, 2021
    Applicants: TOHOKU UNIVERSITY, DAICEL CORPORATION
    Inventors: Daisuke FUKUDA, Daisuke NAGAO, Haruyuki ISHII, Shunho ISHIKAWA
  • Patent number: 11133149
    Abstract: A focused ion beam apparatus (100) includes: a focused ion beam lens column (20); a sample table (51); a sample stage (50); a memory (6M) configured to store in advance three-dimensional data on the sample table and an irradiation axis of the focused ion beam, the three-dimensional data being associated with stage coordinates of the sample stage; a display (7); and a display controller (6A) configured to cause the display to display a virtual positional relationship between the sample table (51v) and the irradiation axis (20Av) of the focused ion beam, which is exhibited when the sample stage is operated to move the sample table to a predetermined position, based on the three-dimensional data on the sample table and the irradiation axis of the focused ion beam.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: September 28, 2021
    Assignee: HITACHI HIGH-TECH SCIENCE CORPORATION
    Inventors: Toshihiro Mochizuki, Haruyuki Ishii, Atsushi Uemoto
  • Publication number: 20210260563
    Abstract: Provided is a production method for core-shell porous silica particles, the production method including: a preparation step of preparing an aqueous solution comprising non-porous silica particles, a cationic surfactant, a basic catalyst, an electrolyte, and an alcohol; a shell precursor formation step of adding a silica source to the aqueous solution to form a shell precursor on a surface of the non-porous silica particles; and a shell formation step of removing the cationic surfactant from the shell precursor to form a porous shell.
    Type: Application
    Filed: June 17, 2019
    Publication date: August 26, 2021
    Applicants: TOHOKU UNIVERSITY, DAICEL CORPORATION
    Inventors: Daisuke NAGAO, Haruyuki ISHII, Shunho ISHIKAWA
  • Publication number: 20210090849
    Abstract: The focused ion beam apparatus includes: an electron beam column; a focused ion beam column; a sample stage; a coordinate acquisition unit configured to acquire, when a plurality of irradiation positions to which the focused ion beam is to be applied are designated on a sample, plane coordinates of each of the irradiation positions; a movement amount calculation unit configured to calculate, based on the plane coordinates, a movement amount by which the sample stage is to be moved to a eucentric height so that the eucentric height matches an intersection position at which the electron beam and the focused ion beam match each other at each of the irradiation positions; and a sample stage movement control unit configured to move, based on the movement amount, the sample stage to the eucentric height at each of the irradiation positions.
    Type: Application
    Filed: September 22, 2020
    Publication date: March 25, 2021
    Inventors: Haruyuki ISHII, Atsushi UEMOTO, Tatsuya ASAHATA
  • Publication number: 20200071171
    Abstract: Provided is a method for manufacturing core-shell-type porous silica particles, the method including: a preparation step for preparing an aqueous solution containing non-porous silica particles, a cationic surfactant, a basic catalyst, a hydrophobic part-containing additive, and an alcohol; a shell precursor formation step for adding a silica source to the aqueous solution to form a shell precursor on the surfaces of the non-porous silica particles; and a shell formation step for removing the hydrophobic part-containing additive and the cationic surfactant from the shell precursor to form a porous shell.
    Type: Application
    Filed: February 9, 2017
    Publication date: March 5, 2020
    Applicants: TOHOKU UNIVERSITY, DAICEL CORPORATION
    Inventors: Mikio KONNO, Diasuke NAGAO, Haruyuki ISHII, Arata KANNO
  • Publication number: 20190271694
    Abstract: To provide magnetic composite particles which can be separated from a sample solution in a short period of time using magnetism, and furthermore, have an excellent dispersion stability in the sample solution, which are magnetic composite particles in which an outer shell is formed on surfaces of core particles containing an inorganic oxide or a polymer, wherein the outer shell comprises magnetic nanoparticles and a silicon compound, the value of the volume average particle diameter (dTEM) of the magnetic composite particles measured by a transmission electron microscope is 30 nm or more to 210 nm or less, and the value of (dDLS)/(dTEM) which is the ratio of the value of the particle diameter (dDLS) of the particles measured by a dynamic light scattering method and the value of the volume average particle diameter (dTEM) is 2.0 or less.
    Type: Application
    Filed: August 31, 2017
    Publication date: September 5, 2019
    Applicants: TOHOKU UNIVERSITY, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Daisuke NAGAO, Mikio KONNO, Haruyuki ISHII, Kumiko HAYASHI, Natsuki KOHAMA, Takayuki YOSHIDA, Toshihiko UEYAMA