Patents by Inventor Takumasa KIMURA

Takumasa KIMURA 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).

  • Curable dental composite
    Patent number: 11446214
    Abstract: A polymerizable monomer, a filler (A), and a filler (B) are contained, the filler (A) includes an inorganic particle and a compound covering the inorganic particle, the filler (B) includes another inorganic particle and another compound covering the other inorganic particle, and the average particle size of the filler (B) is 20% to 550% of the average particle size of the filler (A).
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: September 20, 2022
    Assignee: GC CORPORATION
    Inventors: Akio Takahashi, Takayuki Murata, Takumasa Kimura
  • DENTAL COMPOSITION
    Publication number: 20220047465
    Abstract: One embodiment of the present invention relates to a dental composition including a (meth)acrylate, an ultraviolet absorber, and a fluorescent agent, wherein the ultraviolet absorber has free of a maximum absorption wavelength in a range of greater than 320 nm and less than or equal to 500 nm.
    Type: Application
    Filed: April 22, 2019
    Publication date: February 17, 2022
    Inventors: Satoshi JIN, Takumasa KIMURA, Kyousuke HIRANO
  • Dental curable composition
    Patent number: 10918578
    Abstract: According to one aspect of the present invention, a dental curable composition includes: polymerizable monomers; inorganic particles (A1) and/or inorganic particles (A2) (excluding the inorganic particles (A2); and inorganic particles (B). The inorganic particles (A1) are surface-treated with a compound expressed by a general formula (1) and have a volume-median particle size of greater than or equal to 0.1 ?m and less than or equal to 0.9 ?m. The inorganic particles (A2) are surface-treated with a compound expressed by a general formula (2) and have a volume-median particle size of greater than or equal to 0.1 ?m and less than or equal to 0.9 ?m.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: February 16, 2021
    Assignee: GC Corporation
    Inventors: Takayuki Murata, Takumasa Kimura, Yui Tei, Azusa Miyagawa
  • CURABLE DENTAL COMPOSITE
    Publication number: 20200352830
    Abstract: A polymerizable monomer, a filler (A), and a filler (B) are contained, the filler (A) includes an inorganic particle and a compound covering the inorganic particle, the filler (B) includes another inorganic particle and another compound covering the other inorganic particle, and the average particle size of the filler (B) is 20% to 550% of the average particle size of the filler (A).
    Type: Application
    Filed: May 10, 2019
    Publication date: November 12, 2020
    Applicant: GC CORPORATION
    Inventors: Akio TAKAHASHI, Takayuki MURATA, Takumasa KIMURA
  • DENTAL CURABLE COMPOSITION
    Publication number: 20190380918
    Abstract: According to one aspect of the present invention, a dental curable composition includes: polymerizable monomers; inorganic particles (A1) and/or inorganic particles (A2) (excluding the inorganic particles (A2); and inorganic particles (B). The inorganic particles (A1) are surface-treated with a compound expressed by a general formula (1) and have a volume-median particle size of greater than or equal to 0.1 ?m and less than or equal to 0.9 ?m. The inorganic particles (A2) are surface-treated with a compound expressed by a general formula (2) and have a volume-median particle size of greater than or equal to 0.1 ?m and less than or equal to 0.9 ?m.
    Type: Application
    Filed: December 6, 2017
    Publication date: December 19, 2019
    Inventors: Takayuki MURATA, Takumasa KIMURA, Yui TEI, Azusa MIYAGAWA