US PATENT SUBCLASS 349 / 179
.~.~ Twisted (or chiral) nematic or supertwisted nematic

Current as of: June, 1999
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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

167  DF  WITH SPECIFIED NONCHEMICAL CHARACTERISTIC OF LIQUID CRYSTAL MATERIAL {6}
177  DF  .~ Within nematic phase {2}
179.~.~ Twisted (or chiral) nematic or supertwisted nematic {2}
180  DF  .~.~.~> Having particular parameter of twist
181  DF  .~.~.~> Having particular birefringence or retardation

DEFINITION

Classification: 349/179

Twisted (or chiral) nematic or supertwisted nematic:

(under subclass 177) Subject matter wherein the characteristic recited is that of a liquid crystal within the nematic mesophase in which the liquid crystal molecules exhibit a twist from one substrate to the other.