US4784792A
Expired / Lapsed
US
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Ferroelectric pyridine compound and liquid crystal composition
Assignee: JNC Corp
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Filing: 1986-12-16
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Granted: 1988-11-15
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Expires: 2006-12-16
Abstract
Abstract A ferroelectric pyridine compound suitable as a liquid crystal for display mode utilizing ferroelectric properties and exhibiting SC* phase at a temperature somewhat higher than room temperature and a liquid crystal composition are provided, which compound is expressed by the formula ##STR1## wherein n represents an integer of 0 to 8, R 1 represents an alkyl group of 2 to 18 carbon atoms, R 2 represents an alkyl group of 1 to 18 carbon atoms and the symbol * indicates that C having the symbol attached thereon is an optically active carbon atom.
Inventors
- 👤 Hiromichi Inoue
- 👤 Takashi Inukai
- 👤 Kouji Ohno
- 👤 Kazutoshi Miyazawa
- 👤 Shinichi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:45
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/3444
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A ferroelectric pyridine compound expressed by the formula ##STR10## wherein n represents an integer of 1 to 8, R 1 represents an alkyl group of 2 to 18 carbon atoms, R 2 represents an alkyl group of 1 to 18 carbon atoms and the symbol * indicates that C having the symbol attached thereon is an optically active carbon atom.
Claim 2
Dependent Claim
60 words
A ferroelectric pyridine compound expressed by the formula ##STR10## wherein n represents an integer of 1 to 8, R 1 represents an alkyl group of 2 to 18 carbon atoms, R 2 represents an alkyl group of 1 to 18 carbon atoms and the symbol * indicates that C having the symbol attached thereon is an optically active carbon atom.
Claim 3
Dependent Claim
21 words
A ferroelectric pyridine compound according to claim 1 wherein R 1 of said formula (I) is C 2 H 5 .
Claim 4
Dependent Claim
20 words
A ferroelectric pyridine compound according to claim 1 R 1 of said formula (I) is C 6 H 13 .
Claim 5
Dependent Claim
21 words
A ferroelectric pyridine compound according to claim 1 wherein R 1 of said formula (I) is C 8 H 17 .
Claim 6
Dependent Claim
25 words
A ferroelectric pyridine compound according to claim 1 wherein R 2 of said formula (I) represents an alkyl group of 6 to 10 carbon atoms.
Claim 7
Dependent Claim
21 words
A ferroelectric pyridine compound according to claim 1 wherein n of said formula (I) represents an integer of 3 to 5.
Claim 8
Dependent Claim
32 words
A chiral smectic liquid crystal composition comprising at least two components at least one of which is a ferroelectric pyridine compound expressed by the formula (I) as set forth in claim 1.
Claim 9
Dependent Claim
40 words
A light-switching element using a liquid crystal composition comprising at least two components at least one of which is a ferroelectric pyridine compound expressed by the formula (I) as set forth in claim 1 and exhibiting chiral smectic C phase.
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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) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |