US PATENT SUBCLASS 252 / 299.01
LIQUID CRYSTAL COMPOSITIONS

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


252 /   HD   COMPOSITIONS

299.01LIQUID CRYSTAL COMPOSITIONS {7}
299.1  DF  .~> Containing pleochroic dye
299.2  DF  .~> Containing dopant salt
299.3  DF  .~> Containing charge-transfer agents
299.4  DF  .~> Containing nonchiral aligning agents
299.5  DF  .~> Containing nonchiral additive having no specified mesophase
299.6  DF  .~> Containing nonsteryl liquid crystalline compound of specified structure {7}
299.7  DF  .~> Cholesteric liquid crystal composition containing a sterol derivative

DEFINITION

Classification: 252/299.01

LIQUID CRYSTAL COMPOSITIONS:

(under the class definition) Compositions containing a mesormorphic state of matter which is intermediate between a crystalline solid and a normal isotropic liquid; they

resemble liquids mechanically (as to viscosity) but crystals optically (light scattering and reflection).

(1) Note. The combination of a liquid crystal composition and structure is classified with the class providing for the structure.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting,

448, for display devices using liquid crystals.

250, Radiant Energy,

331, for nonchemical infrared imaging including liquid crystal detector. 345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

38, 50+, and 87+ for selective electrical control of liquid crystal display devices.

349, Liquid Crystal Cells, Elements and Systems,

1+, and 182+, respectively wherein a particular liquid crystal composition is used.

360, Dynamic Magnetic Information Storage or Retrieval, for liquid crystal used to store or retrieve dynamic information stored magnetically.

365, Static Information Storage and Retrieval,

108, for liquid crystal used to store or retrieve static information.

368, Horology: Time Measuring Systems or Devices,

30, 84, and 242 for timepieces using liquid crystal compositions.

428, Stock Material or Miscellaneous Articles,

1, for liquid crystal stock material, i.e., a composition having structure provided for by the class.

430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, appropriate subclasses for radiation imagery chemistry involving a process, product, or composition using a liquid crystal. 436, Chemistry: Analytical and Immunological Testing,

1+, for analytical and analytical control processes employing liquid crystals.

552, Organic Compounds, particularly

502+, for organic compounds having liquid crystal properties.