Novel liquid crystal dyestuffs and electro-optic devices incorporating same
US4184750A · kind A · utility
7Cited by
11References
6Claims
0Family size
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Key dates
| Filing date | Apr 24, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Apr 24, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B56/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel liquid crystal dyestuffs of the formula ##STR1## wherein Y and Z are different and can be nitro or cyano and --N(R).sub.2 wherein R is alkyl or alkylene, preferably of 1 to 4 carbon atoms, and X can be hydrogen, methyl, fluoro or chloro, can be added to known liquid crystal compositions to impart color to the mixtures and improve contrast in a liquid crystal electro-optic device containing such mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.