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US 4,228,087 AGranted
Mesogenic products for liquid crystal cells
AssigneeThomson-CSF
InventorsJean C. Dubois, Francoise Barre
Life of this patent
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Abstract
The present invention relates to a family of substances which, in different temperature ranges, exhibit smectic or nematic properties of mesomorphism. Their general formula is: ##STR1## where R designates one of the three radicals: ##STR2## (n being a whole number ranging from 1 to 20) and X designating a halogen (Br preferably) or the nitrile radical C N.
Claims3
A mesogenic compound of the formula:
- ##STR13## wherein R is C.sub.n H.sub.2n+1 -;
- and n is a whole number from 1 to 20.
A mesogenic compound of the formula:
- ##STR14## wherein R is C.sub.n H.sub.2n+1 -;
- and n is a whole number from 1 to 20.
A mesogenic compound of the formula:
- ##STR15##
Dependencies are inferred from the claim text.