Patents by Inventor Keiji Ashitaka

Keiji Ashitaka 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).

  • Publication number: 20240116763
    Abstract: Provided is a method for producing a silica sol. A gel-like material cannot be generated and highly associated silica particles can be obtained. A method for producing a silica sol comprises a step of making a reaction liquid by mixing liquid (A) comprising an alkaline catalyst, water, a first organic solvent and silica particles for association with liquid (B) comprising at least one of tetramethoxysilane and a condensate thereof and a second organic solvent, wherein during the mixing, an addition rate of the liquid (B) is 8.5×10?4 to 5.6×10?3 (mol of silicon atoms in liquid (B)/mol of water in liquid (A)) per minute.
    Type: Application
    Filed: December 18, 2023
    Publication date: April 11, 2024
    Applicant: FUJIMI INCORPORATED
    Inventor: Keiji ASHITAKA
  • Publication number: 20240050328
    Abstract: Provided is a soft focus filler excellent in both transmittance and haze. The soft focus filler of the present invention includes a powder including plate-shaped crystal particles of titanium phosphate.
    Type: Application
    Filed: October 8, 2021
    Publication date: February 15, 2024
    Applicant: FUJIMI INCORPORATED
    Inventors: Mayumi Iwakuni, Keiji Ashitaka, Naoya Miwa
  • Publication number: 20240002232
    Abstract: A titanium phosphate powder containing plate-like particles with a reduced content ratio of byproducts other than the plate-like particles, and exhibiting crystallinity of titanium phosphate represented by a chemical formula Ti(HPO4)2·nH2O (0?n?1) is provided in the present disclosure. The present disclosure relates to a method for producing a titanium phosphate powder exhibiting crystallinity of titanium phosphate represented by a chemical formula Ti(HPO4)2·nH2O (0?n?1), and containing plate-like particles, the method comprising putting an acidic raw material aqueous solution containing phosphorus and titanium in a sealed vessel, and storing the sealed vessel containing the raw material aqueous solution for a period of 2 hours or more, with the ambient temperature of the sealed vessel maintained under a constant temperature condition within a range of 40° C. or more and less than 100° C.
    Type: Application
    Filed: June 23, 2023
    Publication date: January 4, 2024
    Applicant: FUJIMI INCORPORATED
    Inventors: Ryo NOMURA, Keiji ASHITAKA, Naoya MIWA
  • Publication number: 20230404876
    Abstract: Provided is a white pigment for cosmetics, and the white pigment has a higher function as a base pigment than that of titanium oxide. A white pigment for cosmetics of the present invention includes a titanium phosphate powder having a whiteness of 92.91 or more as determined in accordance with JIS Z 8715.
    Type: Application
    Filed: August 25, 2023
    Publication date: December 21, 2023
    Applicant: FUJIMI INCORPORATED
    Inventors: Mayumi IWAKUNI, Keiji ASHITAKA, Naoya MIWA
  • Publication number: 20230390166
    Abstract: Provided is a powder having excellent hiding power, such that the powder can be used in place of titanium dioxide as a white pigment in a cosmetic. The powder of the present invention includes plate-shaped crystal particles, the volume D50% diameter thereof is 0.7 ?m or more and 8.0 ?m or less, and a coefficient of variation (CV value) of a primary particle diameter is 1.0 or less.
    Type: Application
    Filed: September 8, 2021
    Publication date: December 7, 2023
    Applicant: FUJIMI INCORPORATED
    Inventors: Mayumi Iwakuni, Keiji Ashitaka, Naoya Miwa
  • Publication number: 20230313011
    Abstract: The present invention provides a means capable of further improving stability and washability under acidic conditions. The present invention is sulfonic acid-modified colloidal silica having an amount of sulfonic acid groups per 1 g of particles of 1.5 ?mol/g or more and 13.0 ?mol/g or less.
    Type: Application
    Filed: March 17, 2023
    Publication date: October 5, 2023
    Applicant: FUJIMI INCORPORATED
    Inventors: Shogo TSUBOTA, Keiji ASHITAKA, Masaaki ITO, Tatsuhiko HIRANO, Shota SUZUKI
  • Patent number: 11767224
    Abstract: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol.
    Type: Grant
    Filed: September 22, 2022
    Date of Patent: September 26, 2023
    Assignee: FUJIMI INCORPORATED
    Inventors: Yusuke Kawasaki, Shogo Tsubota, Masaaki Ito, Jun Shinoda, Keiji Ashitaka
  • Publication number: 20230293402
    Abstract: Provided is a white pigment for cosmetics capable of giving a cosmetic having an excellent performance smoothly applicable onto the skin. A white pigment for cosmetics of the present invention includes a titanium phosphate powder, the titanium phosphate powder includes crystal particles of titanium phosphate, and the titanium phosphate powder has an average friction coefficient (MIU) of less than 1.45.
    Type: Application
    Filed: March 20, 2023
    Publication date: September 21, 2023
    Applicant: FUJIMI INCORPORATED
    Inventors: Mayumi IWAKUNI, Keiji ASHITAKA, Naoya MIWA
  • Patent number: 11760697
    Abstract: Provided are a dispersion for a silicon carbide sintered body having a small environmental load, high dispersibility, and excellent temporal stability, and a manufacturing method thereof. The dispersion is a dispersion for a silicon carbide sintered body, containing: silicon carbide particles; boron nitride particles; a resin having a hydroxyl group; and water, wherein the dispersion has a pH at 25° C. of less than or equal to 7.0, and the silicon carbide particles and the boron nitride particles have charges of the same sign. The dispersion is manufactured by a manufacturing method of a dispersion for a silicon carbide sintered body, including a mixing step of mixing a water dispersion containing silicon carbide particles, a water dispersion containing boron nitride particles, and an aqueous solution containing a resin having a hydroxyl group.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: September 19, 2023
    Assignee: FUJIMI INCORPORATED
    Inventors: Keigo Kamoshida, Souma Taguchi, Keiji Ashitaka, Naoya Miwa
  • Publication number: 20230219857
    Abstract: The present invention provides means capable of imparting high temporal stability to a hardening aid solution which serves as a raw material and capable of imparting high strength and high quality stability to a hardened body of the self-hardening material, in the hardened body of the self-hardening material that contains a ceramic powder containing Si element at least on the surface thereof.
    Type: Application
    Filed: May 14, 2021
    Publication date: July 13, 2023
    Applicants: FUJIMI INCORPORATED, OBAYASHI CORPORATION, NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Takashi HAYAKAWA, Naoya MIWA, Keiji ASHITAKA, Takashi HITOMI, Nobuko TAGUCHI, Takashi SHIRAI, Yunzi XIN
  • Patent number: 11638681
    Abstract: Provided is a white pigment for cosmetics capable of giving a cosmetic that gives a coating film having less stickiness and higher long-lasting properties. A white pigment for cosmetics of the present invention includes a titanium phosphate powder, the titanium phosphate powder includes crystal particles of titanium phosphate, and a ratio (oil absorption value/specific surface area) of an oil absorption value (ml/100 g) to a specific surface area (m2/g) of the crystal particles is 2.0 or more.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: May 2, 2023
    Assignee: FUJIMI INCORPORATED
    Inventors: Mayumi Iwakuni, Keiji Ashitaka, Naoya Miwa
  • Publication number: 20230056027
    Abstract: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol.
    Type: Application
    Filed: September 22, 2022
    Publication date: February 23, 2023
    Applicant: FUJIMI INCORPORATED
    Inventors: Yusuke KAWASAKI, Shogo TSUBOTA, Masaaki ITO, Jun SHINODA, Keiji ASHITAKA
  • Publication number: 20230016801
    Abstract: The surface-modified colloidal silica according to an aspect of the present invention contains colloidal silica, and a surface-modifying group for modifying a surface of the colloidal silica, which has a polyoxyalkylene chain having a weight average molecular weight of 20,000 or more.
    Type: Application
    Filed: June 23, 2022
    Publication date: January 19, 2023
    Applicant: Fujimi Incorporated
    Inventors: Shogo Tsubota, Masaaki Ito, Keiji Ashitaka, Jun Shinoda, Yusuke Kawasaki
  • Publication number: 20220403178
    Abstract: A method for increasing the specific surface area of titanium phosphate plate-shaped particles of this invention includes: obtaining a liquid in a state where a powder containing titanium phosphate plate-shaped particles is dispersed in an aqueous alkaline solution.
    Type: Application
    Filed: May 15, 2020
    Publication date: December 22, 2022
    Applicant: FUJIMI INCORPORATED
    Inventors: Tomomi AKIYAMA, Takashi HAYAKAWA, Keiji ASHITAKA, Naoya MIWA
  • Patent number: 11530335
    Abstract: To provide modified colloidal silica capable of improving the stability of the polishing speed with time when used as abrasive grains in a polishing composition for polishing a polishing object that contains a material to which charged modified colloidal silica easily adheres, such as a SiN wafer, and to provide a method for producing the modified colloidal silica. Modified colloidal silica, being obtained by modifying raw colloidal silica, wherein the raw colloidal silica has a number distribution ratio of 10% or less of microparticles having a particle size of 40% or less relative to a volume average particle size based on Heywood diameter (equivalent circle diameter) as determined by image analysis using a scanning electron microscope.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: December 20, 2022
    Assignee: FUJIMI INCORPORATED
    Inventors: Keiji Ashitaka, Shogo Tsubota
  • Patent number: 11518682
    Abstract: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: December 6, 2022
    Assignee: FUJIMI INCORPORATED
    Inventors: Yusuke Kawasaki, Shogo Tsubota, Masaaki Ito, Jun Shinoda, Keiji Ashitaka
  • Patent number: 11499070
    Abstract: To provide modified colloidal silica capable of improving the stability of the polishing speed with time when used as abrasive grains in a polishing composition for polishing a polishing object that contains a material to which charged modified colloidal silica easily adheres, such as a SiN wafer, and to provide a method for producing the modified colloidal silica. Modified colloidal silica, being obtained by modifying raw colloidal silica, wherein the raw colloidal silica has a number distribution ratio of 10% or less of microparticles having a particle size of 40% or less relative to a volume average particle size based on Heywood diameter (equivalent circle diameter) as determined by image analysis using a scanning electron microscope.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: November 15, 2022
    Assignee: FUJIMI INCORPORATED
    Inventors: Keiji Ashitaka, Shogo Tsubota
  • Publication number: 20220267644
    Abstract: Provided is a method for filtering an additive-containing liquid that can achieve a polishing composition exhibiting excellent defect reducing capability while maintaining a practical filter life. The method for filtering a polishing additive-containing liquid provided by the present invention includes the step of: filtering the polishing additive-containing liquid with a filter that satisfies the following conditions (1) and (2). (1) The average pore diameter P measured by a palm porometer is 0.15 ?m or less. (2) The pore diameter gradient (Sin/Sout), which is the ratio of the inlet-side average pore diameter (SO to the outlet-side average pore diameter (Sout), both diameters being measured through observation with an SEM, is 3 or less.
    Type: Application
    Filed: July 30, 2020
    Publication date: August 25, 2022
    Applicant: FUJIMI INCORPORATED
    Inventors: Shinji FURUTA, Takashi HAYAKAWA, Keiji ASHITAKA, Naoya MIWA, Kohsuke TSUCHIYA, Hisanori TANSHO, Reiko AKIZUKI
  • Patent number: 11345596
    Abstract: The titanium phosphate powder of the present invention includes plate-shaped crystalline particles of titanium phosphate, an average thickness of the plate-shaped crystalline particles is 0.01 ?m or more and less than 0.10 ?m, and an aspect ratio, which is a value obtained by dividing an average primary particle diameter of the plate-shaped crystalline particles by the average thickness, is 5 or more. In the method for producing a titanium phosphate powder of the present invention, a raw material containing titanium and phosphorus is caused to react by a hydrothermal synthesis method, and when the titanium phosphate powder including plate-shaped crystalline particles of titanium phosphate is produced, a mixture of titanium sulfate and phosphoric acid is used as the raw material.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: May 31, 2022
    Assignee: FUJIMI INCORPORATED
    Inventors: Mayumi Iwakuni, Keiji Ashitaka, Naoya Miwa
  • Publication number: 20220144639
    Abstract: The titanium phosphate powder of the present invention includes plate-shaped crystalline particles of titanium phosphate, an average thickness of the plate-shaped crystalline particles is 0.01 ?m or more and less than 0.10 ?m, and an aspect ratio, which is a value obtained by dividing an average primary particle diameter of the plate-shaped crystalline particles by the average thickness, is 5 or more. In the method for producing a titanium phosphate powder of the present invention, a raw material containing titanium and phosphorus is caused to react by a hydrothermal synthesis method, and when the titanium phosphate powder including plate-shaped crystalline particles of titanium phosphate is produced, a mixture of titanium sulfate and phosphoric acid is used as the raw material.
    Type: Application
    Filed: January 26, 2022
    Publication date: May 12, 2022
    Applicant: FUJIMI INCORPORATED
    Inventors: Mayumi IWAKUNI, Keiji ASHITAKA, Naoya MIWA