The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 1992
Filed:
Jul. 17, 1990
Chisso Corporation, Osaka, JP;
Abstract
.alpha.-hydroxyketone derivatives represented by the general formula (I) which are novel optically active compounds; liquid crystal compositions, such as chiral smectic or chiral nematic compositions, containing the derivatives; and liquid crystal devices using the compositions. ##STR1## wherein A and B are independently a radical represented by the general formula (II): ##STR2## wherein R.sup.2 is an aliphatic hydrocarbon having 1 to 16 carbon atoms, which may contain --O-- and may be substituted by a cyano group and/or a halogen atom, ##STR3## are independently a single bond, ##STR4## etc., X and Y are independently a single bond, or --CH.sub.2 CH.sub.2 --, etc., or an aliphatic hydrocarbon having 1 to 16 carbon atoms; R.sup.1 is an alkyl group, a phenyl group, or a cyclohexyl group; n is 0 or 1; and the asterisk (*) indicates an asymmetric carbon atom.