US4029595A
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Novel liquid crystal compounds and electro-optic devices incorporating them
Assignee: RCA Corp
•
Filing: 1976-09-17
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Granted: 1977-06-14
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Expires: 1996-09-17
Abstract
Abstract Liquid crystal compounds of the formula ##STR1## wherein X can be an alkoxy (RO-), an acyloxy ##STR2## or an alkylcarbonato ##STR3## group wherein R is an alkyl group having up to 10 carbon atoms and Y is a nitro or cyano group, having positive dielectric anisotropy and are useful in electro-optic devices which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.
Inventors
- 👤 Daniel Louis Ross
- 👤 Dragan Milan Gavrilovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
An electro-optic cell comprising a liquid crystal layer between two electrodes wherein said liquid crystal includes a compound of the formula ##STR13## wherein X can be an alkoxy (RO--), acyloxy ##STR14## or alkylcarbonato ##STR15## group wherein R is an alkyl group having 1-10 carbon atoms and Y is a nitro or cyano group.
Claim 2
Dependent Claim
53 words
An electro-optic cell comprising a liquid crystal layer between two electrodes wherein said liquid crystal includes a compound of the formula ##STR13## wherein X can be an alkoxy (RO--), acyloxy ##STR14## or alkylcarbonato ##STR15## group wherein R is an alkyl group having 1-10 carbon atoms and Y is a nitro or cyano group.
Claim 3
Dependent Claim
12 words
An electro-optic cell according to claim 1 wherein both electrodes are transparent.
Claim 4
Dependent Claim
39 words
A liquid crystal compound having the formula ##STR16## wherein X can be an alkoxy (RO--), acyloxy ##STR17## or alkylcarbonato ##STR18## group wherein R is an alkyl group having 1-10 carbon atoms and Y is a nitro or cyano group.
Claim 5
Dependent Claim
39 words
A liquid crystal compound having the formula ##STR16## wherein X can be an alkoxy (RO--), acyloxy ##STR17## or alkylcarbonato ##STR18## group wherein R is an alkyl group having 1-10 carbon atoms and Y is a nitro or cyano group.
Claim 6
Dependent Claim
12 words
A compound according to claim 3 wherein Y is a cyano group.
Claim 7
Dependent Claim
13 words
A compound according to claim 3 wherein X is the alkylcarbonato ##STR19## group.
Claim 8
Dependent Claim
10 words
A compound according to claim 4 wherein X is butylcarbonato.
Claim 9
Dependent Claim
13 words
A compound according to claim 3 wherein X is the acyloxy ##STR20## group.
Claim 10
Dependent Claim
16 words
A compound according to claim 3 wherein X is hexanoyloxy and Y is a nitro group.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |