Liquid crystal compounds
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United States of America Patent
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Nov 17, 1998
Issued Date -
N/A
app pub date -
Sep 30, 1992
filing date -
Jul 26, 1989
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Expired
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Abstract
A liquid crystal compound represented by formula (I): ##STR1## wherein R.sub.1 represents an alkyl group having from 3 to 18 carbon atoms; R.sub.2 represents an alkyl group having from 3 to 18 carbon atoms; X represents ##STR2## Y represents ##STR3## (A) and (B) each represents a group selected from the group consisting of ##STR4## and ##STR5## and * indicates an optically active center.
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