Patents by Inventor Kouta Yoshii

Kouta Yoshii 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).

  • Liquid crystal sealing material and liquid crystal display cell using same
    Patent number: 7521099
    Abstract: To provide a photopolymerization initiator having an extremely low possibility of contaminating liquid crystals, and a liquid crystal sealing material using such a photopolymerization initiator. A liquid crystal sealing material comprising (a) a reactive photopolymerization initiator represented by the general formula (1) and (b) a photocurable resin: (wherein R1 represents a divalent straight chain, branched or cyclic lower alkylene group having 1 to 10 carbon atoms or an arylene group; R2 represents a divalent straight chain, branched or cyclic lower alkylene group having 1 to 10 carbon atoms or an arylene group; Ar represents an arylene group; R3 represents a hydrogen atom or a methyl group; X and Y respectively represent O or S; and Z is a hydroxyl group or a morpholino group).
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: April 21, 2009
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Naoyuki Ochi, Toyohumi Asano, Masahiro Imaizumi, Masaru Kudou, Eiichi Nishihara, Masahiro Hirano, Kouta Yoshii, Sumio Itimura, Makiko Kogo
  • Liquid Crystal Sealing Material and Liquid Crystal Display Cell Using Same
    Publication number: 20070258033
    Abstract: [PROBLEMS] To provide a photopolymerization initiator having an extremely low possibility of contaminating liquid crystals, and a liquid crystal sealing material using such a photopolymerization initiator. [MEANS FOR SOLVING PROBLEMS] A liquid crystal sealing material comprising (a) a reactive photopolymerization initiator represented by the general formula (1) and (b) a photocurable resin: (wherein R1 represents a divalent straight chain, branched or cyclic lower alkylene group having 1 to 10 carbon atoms or an arylene group; R2 represents a divalent straight chain, branched or cyclic lower alkylene group having 1 to 10 carbon atoms or an arylene group; Ar represents an arylene group; R3 represents a hydrogen atom or a methyl group; X and Y respectively represent O or S; and Z is a hydroxyl group or a morpholino group).
    Type: Application
    Filed: August 31, 2005
    Publication date: November 8, 2007
    Inventors: Naoyuki Ochi, Toyohumi Asano, Masahiro Imaizumi, Masaru Kudou, Eiichi Nishihara, Masahiro Hirano, Kouta Yoshii, Sumio Itimura, Makiko Kogo