US5061399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically active naphthalene compounds and liquid crystal materials and devices incorporating them
Assignee: Qinetiq Ltd
•
Filing: 1987-04-27
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Granted: 1991-10-29
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Expires: 2007-04-27
Abstract
Abstract Optically active naphthalene compounds having the formula: ##STR1## in which X and Y are selected from combinations (a), (b) and (c): (a) X is C 1-10 alkyl or alkoxy and Y is C 4-16 optically active alkyl, (b) X is C 1-10 alkyl or alkoxy and Y is ##STR2## where R 2 is C 4-16 optically active alkyl, (c) X is ##STR3## where R 1 is C 1-10 alkyl or alkoxy and Y is C 4-16 optically active alkyl. Ferroelectric smectic liquid crystal materials being compositions containing these compounds are also described.
Inventors
- 👤 John A. Jenner
- 👤 Ian C. Sage
- 👤 Stephen J. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:45
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/32; C09K19/322
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
26 words
An optically active naphthlene compound having the formula: ##STR42## where R 1 is C 1-10 alkyl or alkoxy and R* is C 4-16 optically active alkyl.
Claim 2
Dependent Claim
26 words
An optically active naphthlene compound having the formula: ##STR42## where R 1 is C 1-10 alkyl or alkoxy and R* is C 4-16 optically active alkyl.
Claim 3
Dependent Claim
13 words
The compound according to claim 1, wherein R 1 is C 6-10 n-alkoxy.
Claim 4
Dependent Claim
16 words
The compound according to claim 1 or 2, wherein R* is an optically active 1-methylalkyl group.
Claim 5
Dependent Claim
10 words
The compound according to claim 3, wherein R* is 1-methylheptyl.
Claim 6
Dependent Claim
11 words
The compound according to claim 3, wherein R 1 is n-octyloxy.
Claim 7
Dependent Claim
25 words
A ferroelectric smectic liquid crystal composition containing at least two compounds, at least one of said compounds being a compound as claimed in claim 1.
Claim 8
Dependent Claim
24 words
A ferroelectric smectic liquid crystal composition containing at least two compounds, at least one of which is a compound as claimed in claim 2.
Claim 9
Dependent Claim
25 words
A ferroelectric smectic liquid crystal composition containing at least two compounds, at least one of said compounds being a compound as claimed in claim 3.
Claim 10
Dependent Claim
25 words
A ferroelectric smectic liquid crystal composition containing at least two compounds, at least one of said compounds being a compound as claimed in claim 4.
Claim 11
Dependent Claim
25 words
A ferroelectric smectic liquid crystal composition containing at least two compounds, at least one of said compounds being a compound as claimed in claim 5.
Claim 12
Dependent Claim
58 words
A ferroelectric smectic liquid crystal composition according to any one of claims 6-10, which additionally contains at least one compound selected from the group consisting of formulae 11.1, 11.2, and III: ##STR43## where R 4 and R 5 independently represent C 3-12 alkyl or alkoxy and R 6 and R 7 independently represent C 1-12 alkyl or alkoxy.
Claim 13
Dependent Claim
56 words
A liquid crystal electro-optic display device which consists of two substrates, at least one of which is optically transparent, having electrodes on the inner surface of the substrates and a layer of a liquid crystal material sandwiched between the substrates, wherein the liquid crystal material is a composition as claimed in any one of claims 6-10.
Claim 14
Dependent Claim
53 words
A liquid crystal electro-optic display device which consists of two substrates, at least one of which is optically transparent, having electrodes on the inner surface of the substrates and a layer of a liquid crystal material sandwiched between the substrates, wherein the liquid crystal material is a composition as claimed in claim 11.
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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) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |