Patents by Inventor Shigeaki Chika

Shigeaki Chika 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).

  • Anisotropic scattering film and liquid crystal display using the same
    Patent number: 6908646
    Abstract: An anisotropic scattering film, wherein said film has a sea-island structure comprising a matrix phase consisting of at least one polymeric material, and a dispersed phase consisting of at least one polymeric material, wherein the dispersed phase is rod-like, the dispersed phase substantially orientates to one direction, the refractive index of the dispersed phase in the major axis direction differs from the refractive index of the matrix phase in the corresponding direction, the diameter of the dispersed phase is 200 nm or less, and the length of the dispersed phase is 800 nm or more.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: June 21, 2005
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kazunori Akiyoshi, Shigeaki Chika, Koichi Fujisawa
  • Anisotropic scattering film and liquid crystal display using the same
    Publication number: 20030175446
    Abstract: An anisotropic scattering film, wherein
    Type: Application
    Filed: February 4, 2003
    Publication date: September 18, 2003
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kazunori Akiyoshi, Shigeaki Chika, Koichi Fujisawa
  • Curable resin composition for overcoat film of color filter and color filter
    Patent number: 5614594
    Abstract: A curable resin composition used as an overcoat film of a color filter for a color liquid crystal display device contains polyglycidyl methacrylate and a curing agent comprising a carboxylic anhydride and a bisphenol S, a halogen- or (halo)alkyl-substituted derivative thereof, or a diaminophenol. The cured composition is used as an overcoat film with good heat resistance on a color filter of a liquid crystal display device.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: March 25, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Susumu Miyazaki, Shigeaki Chika, Kouichi Satou, Naoki Takeyama, Shigeki Yamamoto
  • Optically active aromatic compounds, preparation process therefor, liquid crystal materials and a light switching element
    Patent number: 5374376
    Abstract: Disclosed are herein optically active aromatic compounds represented by the formula (I): ##STR1## wherein X represents --COO-- or --OCO--; Y represents --COO--, --OCO-- or --O--; R.sub.2 represents an alkyl or alkoxyalkyl group having 1 to 20 carbon atoms unsubstituted or substituted by a halogen atom; R.sub.1 represents an alkyl group having 3 to 20 carbon atoms;Z represents ##STR2## wherein p represents a number of 1 to 5 and * indicates an asymmetric carbon atom; l and k each represents a number of 1 or 2; m and s each represents a number of 0 or 1, which are useful as a liquid crystal.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: December 20, 1994
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takayuki Higashii, Isao Kurimoto, Shoji Toda, Masayoshi Minai, Shigeaki Chika, Koichi Fujisawa, Kiyoshi Imamura