US PATENT SUBCLASS 252 / 299.65
.~.~.~ Benzene rings linked by direct bond

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

299.01  DF  LIQUID CRYSTAL COMPOSITIONS {7}
299.6  DF  .~ Containing nonsteryl liquid crystalline compound of specified structure {7}
299.64  DF  .~.~ Aryl ester of aryl acid having three benzene rings {1}
299.65.~.~.~ Benzene rings linked by direct bond

DEFINITION

Classification: 252/299.65

Benzene rings linked by direct bond:

(under subclass 299.64) Compositions wherein the liquid crystal ester compound having three or more benzene rings also has at least two benzene rings linked together by a direct bond.