Patents by Inventor Kazuki URAKAWA

Kazuki URAKAWA 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: 20240192593
    Abstract: Provided are a highly-curable photosensitive composition capable of forming cured products that are less likely to undergo excessive mass loss even when heated; and a product of curing of such a photosensitive composition. The photosensitive composition includes photopolymerizable compounds (A) and an initiating agent (C), in which the photopolymerizable compounds (A) include a combination of a compound of a specific structure having a radically polymerizable group-containing group or a cationically polymerizable group-containing group and a polyfunctional compound different from the compound of a specific structure.
    Type: Application
    Filed: October 17, 2023
    Publication date: June 13, 2024
    Inventors: Kazuki URAKAWA, Takuro ASABA, Hideki SAIJYO, Hiroki CHISAKA
  • Publication number: 20240141085
    Abstract: A photocurable liquid composition capable of forming a cured product in which localization of metal oxide nanoparticles is suppressed, a cured product of the photocurable liquid composition, and a method for producing a cured product using the photocurable liquid composition. As a nitrogen-containing compound, at least one of an amine compound having a specific structure and an imine compound having specific structure is added to the photocurable liquid composition including the photopolymerizable monomer, metal oxide nanoparticles, and a photopolymerization initiator.
    Type: Application
    Filed: February 21, 2022
    Publication date: May 2, 2024
    Inventors: Yoichiro IJIMA, Hiroki CHISAKA, Koichi MISUMI, Kazuki URAKAWA
  • Publication number: 20230242692
    Abstract: A composition that gives a cured product having both of high refractive index and high light transmittance, and a cured product of said composition are provided. In the composition including a photopolymerizable compound (A) and metal oxide particles (B), metal oxide particles (B) where those surfaces are functionalized with a functionalizing agent, and which are composed of a metal oxide that exhibits a refractive index of 2.0 or higher for light at a wavelength of 550 nm are used, and a first functionalizing agent including a metal atom having HOMO-LUMO band gap of more than 3.1 eV and 6.0 eV or less, and a second functionalizing agent having a spacer group and not corresponding to the first functionalizing agent are used as the functionalizing agent in combination.
    Type: Application
    Filed: January 27, 2023
    Publication date: August 3, 2023
    Inventor: Kazuki URAKAWA
  • Publication number: 20230099775
    Abstract: A curable composition capable of forming a cured product having a high transparency, a resistance to loss of transparency when heated, and an excellent organic solvent resistance, a cured product of the curable composition, and a method for producing a cured film using the curable composition. A polymerizable fluorene compound having a radical polymerizable group-containing group or a cationic polymerizable group-containing group and a fluorene skeleton as a polymerizable compound, and thermal initiator as an initiator are used in a curable composition including a polymerizable compound, metal oxide microparticles (B) including titanium oxide microparticles, an initiator, and a solvent.
    Type: Application
    Filed: July 29, 2022
    Publication date: March 30, 2023
    Inventors: Kazuki URAKAWA, Dai SHIOTA