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:
Sep. 21, 1999
Filed:
Nov. 14, 1996
Nippon Soken, Inc., Nishio, JP;
Abstract
An antiferroelectric composition comprising 70 wt % or more of a mixture consisting of two groups of compounds represented by the following general formula (I): ##STR1## wherein each of R, R.sup.1, R.sup.2 and R.sup.3 are an atom or an atomic group, R is an atomic group having the most carbon atoms, C* represents an asymmetric carbon, R.sup.1, R.sup.2, and R.sup.3 are numbered in order of increasing number of carbon atoms (i.e. R.sup.1 <R.sup.2 <R.sup.3), or, if two or more groups have the same number of carbon atoms, they are numbered in order of increasing atomic group weight or increasing atomic weight, and wherein one component of the mixture has R.sup.1, R.sup.2 and R.sup.3 arranged clockwise when the molecule is viewed along the R--C bond, with the C* atom in front, and the other, counterclockwise. The composition provides an antiferroelectric liquid crystal composition having a lower crystal temperature and a wide liquid crystal temperature range with a small number of component compounds.