Patents by Inventor Hiromu Miyajima

Hiromu Miyajima 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).

  • Solvent-soluble polyimide and production thereof
    Patent number: 4954612
    Abstract: A solvent-soluble polyimide obtained from an exo-form dicarboxylic acid anhydride with an aromatic diamine, e.g. 2,2,-bis[4-(4-aminophenoxy)phenyl]propane is improved in film-forming properties and transparency, and particularly suitable for producing an orientation controlling film in a liquid crystal display device.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: September 4, 1990
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yoshihiro Nomura, Kazuhito Hanabusa, Hiroshi Minamisawa, Takashi Morinaga, Toichi Sakata, Yoshiyuki Mukoyama, Hiroshi Nishizawa, Hiromu Miyajima
  • Polymers of tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl (meth)acrylate
    Patent number: 4591626
    Abstract: A polymer obtained by polymerizing tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl acrylate or methacrylate in an amount of 100-5% by weight with one or more copolymerizable unsaturated monomers in an amount of 0 to 95% by weight is excellent in transparency, moisture resistance, and heat resistance and is suitable as a material for optical elements.
    Type: Grant
    Filed: October 23, 1984
    Date of Patent: May 27, 1986
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Hiromasa Kawai, Takashi Morinaga, Hiromu Miyajima, Toshio Akima, Mitsuharu Kato, Yutaka Hosoi
  • Polymers of tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl (meth)acrylate
    Patent number: RE34061
    Abstract: A polymer obtained by polymerizing tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl acrylate or methacrylate in an amount of 100-5% by weight with one or more copolymerizable unsaturated monomers in an amount of 0 to 95% by weight is excellent in transparency, moisture resistance, and heat resistance and is suitable as a material for optical elements.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: September 8, 1992
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Hiromasa Kawai, Takashi Morinaga, Hiromu Miyajima, Toshio Akima, Mitsuharu Kato, Yutaka Hosoi