Patents by Inventor Akihide MIZUTANI

Akihide MIZUTANI 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: 11723263
    Abstract: With a light-emission-layer material comprising: a novel polycyclic aromatic compound (1) or a multimer thereof in which a plurality of aromatic rings are linked by a boron atom and a nitrogen atom; and a specific anthracene-based compound (3) that achieves optimum light-emission characteristics in combination with said polycyclic aromatic compound or a multimer thereof, it is possible to provide an organic EL element having optimum light-emission characteristics. Ring A to ring C are an aryl ring or the like, Y1 represents B, X1 and X2 represent N—R, R of the N—R is an aryl or the like, and Ar3 and Ar4 are a hydrogen atom, a phenyl, a group represented by formula (4), or the like.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: August 8, 2023
    Assignees: Kwansei Gakuin Educational Foundation, SK Materials JNC Co., Ltd.
    Inventors: Takuji Hatakeyama, Akihide Mizutani, Toshihiro Koike
  • Publication number: 20230096132
    Abstract: According to the present invention, options for materials for organic devices such as materials for organic EL elements are increased by addition of a cycloalkane, by condensation, to a polycyclic aromatic compound in which a plurality of aromatic rings are linked together by boron atoms, oxygen atoms, and the like. By using a novel cycloalkane-condensed polycyclic aromatic compound as a material for an organic EL element, for example, an organic EL element having excellent emission efficiency and element life is provided.
    Type: Application
    Filed: April 14, 2020
    Publication date: March 30, 2023
    Applicants: Kwansei Gakuin Educational Foundation, SK Materials JNC Co., Ltd.
    Inventors: Takuji HATAKEYAMA, Kazushi SHIREN, Akiko KAGEYAMA, Hiroyuki TANAKA, Akihide MIZUTANI, Yasuyuki SASADA
  • Patent number: 11600790
    Abstract: By using a polycyclic aromatic compound as a material for a light-emitting layer, formed by connecting a plurality of aromatic rings with a boron atom and an oxygen, sulfur, or selenium atom, which have been substituted by a specific aryl such as anthracene, an organic EL element having at least one of excellent quantum efficiency and element life can be provided.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: March 7, 2023
    Assignees: Kwansei Gakuin Educational Foundation, SK Materials JNC Co., Ltd.
    Inventors: Takuji Hatakeyama, Akio Tajima, Akihide Mizutani, Daisuke Baba, Yuko Yamaga
  • Publication number: 20210167288
    Abstract: By using a polycyclic aromatic compound as a material for a light-emitting layer, formed by connecting a plurality of aromatic rings with a boron atom and an oxygen, sulfur, or selenium atom, which have been substituted by a specific aryl such as anthracene, an organic EL element having at least one of excellent quantum efficiency and element life can be provided.
    Type: Application
    Filed: June 18, 2018
    Publication date: June 3, 2021
    Applicants: Kwansei Gakuin Educational Foundation, JNC Corporation
    Inventors: Takuji Hatakeyama, Akio TAJIMA, Akihide MIZUTANI, Daisuke BABA, Yuko YAMAGA
  • Publication number: 20190207112
    Abstract: With a light-emission-layer material comprising: a novel polycyclic aromatic compound (1) or a multimer thereof in which a plurality of aromatic rings are linked by a boron atom and a nitrogen atom; and a specific anthracene-based compound (3) that achieves optimum light-emission characteristics in combination with said polycyclic aromatic compound or a multimer thereof, it is possible to provide an organic EL element having optimum light-emission characteristics. Ring A to ring C are an aryl ring or the like, Y1 represents B, X1 and X2 represent N—R, R of the N—R is an aryl or the like, and Ar3 and Ar4 are a hydrogen atom, a phenyl, a group represented by formula (4), or the like.
    Type: Application
    Filed: April 20, 2017
    Publication date: July 4, 2019
    Applicants: Kwansei Gakuin Educational Foundation, JNC Corporation
    Inventors: Takuji Hatakeyama, Akihide MIZUTANI, Toshihiro KOIKE