Patents by Inventor Mitshuhiro Koden

Mitshuhiro Koden 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).

  • Smectic liquid crystal composition and liquid crystal device
    Patent number: 5800736
    Abstract: A liquid crystal composition is realized, which composition simultaneously exhibits a negatively large .DELTA..di-elect cons. value suitable to .tau.-Vmin, and SA phase within a sufficient temperature range for realizing a good alignment.A smectic liquid crystal composition containing component (AI), component (B) and/or component (C), expressed by the following formulas: ##STR1## wherein R.sup.1 represents an alkyl group of 1 to 9 carbon atoms, R.sup.2 represents an alkyl group of 1 to 9 carbon atoms, R.sup.3 represents an alkyl group of 1 to 18 carbon atoms, R.sup.4 represents an alkyl group of 1 to 18 carbon atoms, X represents H or F, R.sup.5 represents an alkyl group of 6 to 15 carbon atoms and R.sup.6 represents an alkyl group of 6 to 15 carbon atoms.Ferroelectric liquid crystal material having a negative dielectric anisotropy is applicable to display element utilizing AC-stabilizing effect and .tau.-Vmin.
    Type: Grant
    Filed: January 5, 1998
    Date of Patent: September 1, 1998
    Assignees: Chisso Corporation, Sharp Kabushiki Kaisha
    Inventors: Eiji Okabe, Mayumi Tanabe, Shinichi Saito, Akira Sakaigawa, Hitoshi Takeda, Masami Kido, Takashi Kaneko, Mitshuhiro Koden, Teiyu Sako