Patents by Inventor Jyoji Kawamura

Jyoji Kawamura 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).

  • Polymerizable liquid crystal composition and optically anisotropic medium
    Patent number: 7449223
    Abstract: A polymerizable liquid crystal composition includes a liquid crystal compound having a polymerizable group, wherein the composition includes from 0.1 to 6.0% by weight of a (meth)acrylic copolymer (H), which 1) has a side chain containing a fluorine group, and a side chain containing a group represented by a general formula (h): 2) has a fluorine group content of 3 to 30% by weight, 3) has a ratio of side chains containing the group represented by the general formula (h) relative to the combined total of all side chains that falls within a range from 9 to 95 mol %, and 4) has a weight average molecular weight within a range from 10,000 to 300,000.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: November 11, 2008
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Jyoji Kawamura, Yoshiyuki Ono, Yasuyuki Suzuki, Hitoshi Hayakawa, Isa Nishiyama, Yasuyuki Watanabe, Yasuhiro Kuwana
  • Polymerizable liquid crystal composition and optically anisotropic medium
    Publication number: 20070170394
    Abstract: A polymerizable liquid crystal composition includes a liquid crystal compound having a polymerizable group, wherein the composition includes from 0.1 to 6.0% by weight of a (meth)acrylic copolymer (H), which 1) has a side chain containing a fluorine group, and a side chain containing a group represented by a general formula (h): 2) has a fluorine group content of 3 to 30% by weight, 3) has a ratio of side chains containing the group represented by the general formula (h) relative to the combined total of all side chains that falls within a range from 9 to 95 mol %, and 4) has a weight average molecular weight within a range from 10,000 to 300,000.
    Type: Application
    Filed: May 26, 2005
    Publication date: July 26, 2007
    Applicant: DAINIPPON INK AND CHEMICALS, INC.
    Inventors: Jyoji Kawamura, Yoshiyuki Ono, Yasuyuki Suzuki, Hitoshi Hayakawa, Isa Nishiyama, Yasuyuki Watanabe, Yasuhiro Kuwana