US PATENT SUBCLASS 534 / 577
.~.~ Liquid crystal (e.g., pleochroic, etc.)

Current as of: June, 1999
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534 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
573  DF  .~ Azo {51}
577.~.~ Liquid crystal (e.g., pleochroic, etc.)

DEFINITION

Classification: 534/577

(under subclass 573) Compounds which are azo dyes existing either in a semi-crystalline form or in a transition state between crystalline solid and normal liquid, i.e., having the appearance of being crystals while having the viscosities to behave mechanically as liquids, and which usually show different colors.

(1) Note. These dyes are utilized in display type devices.