Patents by Inventor Yuki HIROI

Yuki HIROI 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).

  • Polymer compound and light emitting device using the same
    Patent number: 11021568
    Abstract: A polymer compound which is useful for producing a light emitting device having excellent luminance life is described. The polymer compound contains a constitutional unit having a residue of a compound represented by the formula (1) and a constitutional unit having no residue of a compound represented by the formula (1): In formula (1), Ring A, Ring B and Ring C represent an aromatic hydrocarbon ring, X represents a boron atom, Y1, Y2 and Y3 represent N-Ry, a sulfur atom or a selenium atom, Ry represents a hydrogen atom, an aryl group, a monovalent heterocyclic group or an alkyl group, and n3 is 0 or 1. When n3 is 0, —Y3— is absent.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: June 1, 2021
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Ryuji Matsumoto, Yuki Hiroi, Tomoyasu Yoshida, Daisuke Fukushima
  • POLYMER COMPOUND AND LIGHT EMITTING DEVICE USING THE SAME
    Publication number: 20210087330
    Abstract: A polymer compound which is useful for producing a light emitting device having excellent luminance life is described. The polymer compound contains a constitutional unit having a residue of a compound represented by the formula (1) and a constitutional unit having no residue of a compound represented by the formula (1): In formula (1), Ring A, Ring B and Ring C represent an aromatic hydrocarbon ring, X represents a boron atom, Y1, Y2 and Y3 represent N-Ry, a sulfur atom or a selenium atom, Ry represents a hydrogen atom, an aryl group, a monovalent heterocyclic group or an alkyl group, and n3 is 0 or 1. When n3 is 0, —Y3— is absent.
    Type: Application
    Filed: June 27, 2018
    Publication date: March 25, 2021
    Inventors: Ryuji MATSUMOTO, Yuki HIROI, Tomoyasu YOSHIDA, Daisuke FUKUSHIMA