Patents by Inventor Nobuyoshi Maruyama

Nobuyoshi Maruyama 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).

  • Optically active compound
    Patent number: 5118442
    Abstract: An optically active compound represented by formula (I): ##STR1## wherein R.sup.1 represents an alkyl group having from 6 to 18 carbon atoms or an alkoxy group having from 6 to 18 carbon atoms; A represents ##STR2## or ##STR3## wherein ring ##STR4## represents a nitrogen-containing hetero-aromatic ring; n and m each represents 0 or 1; R.sup.2 represents an alkyl group having from 1 to 12 carbon atoms; and C* is an asymmetric carbon atom. The compound of formula (I) exhibits excellent physicochemical stability, a low temperature range for the chiral smectic C phase when used either alone or in combination with other compounds, and a rapid response.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: June 2, 1992
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Masaki Saito, Makoto Takeda, Noriko Wada, Shiroh Inui, Hiroshi Taniguchi, Kazuaki Isomura, Nobuyoshi Maruyama, Shoichi Seo, Hiroshi Iwane, Shin Kawano