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US4642199A
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Novel liquid crystal compounds and liquid crystal compositions containing same
Assignee: JNC Corp
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Filing: 1985-06-13
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Granted: 1987-02-10
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Expires: 2005-06-13
Abstract
Abstract A novel pyridine derivative capable of increasing the dielectric anisotropy value (Δε) or optical anisotropy value (Δn) of liquid crystal compositions including the derivative and lowering the driving voltages of liquid crystal display elements using the composition, and also a liquid crystal composition containing the pyridine derivative are provided, which pyridine derivative is expressed by the formula R--X--COO--Y--CH.sub.2 CH.sub.2 --Z--A wherein R represents an alkyl group or an alkoxy group each of 1-10 carbon atoms; X represents ##STR1## Y represents ##STR2## when Y is ##STR3## Z represents ##STR4## and A represents F, Cl or cyano group; and when Y is ##STR5## Z represents ##STR6## and A represents an alkyl group or an alkoxy group each of 1-10 carbon atoms.
Inventors
- 👤 Shigeru Sugimori
- 👤 Kazunori Nigorikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:25
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/3444
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A pyridine derivative expressed by the formula R--X--COO--Y--CH.sub.2 CH.sub.2 --Z--A (I) wherein R represents an alkyl group or an alkoxy group each of 1˜10 carbon atoms; X represents ##STR18## Y represents ##STR19## when Y is ##STR20## Z represents ##STR21## and A represents F, Cl or a cyano group; and when Y is ##STR22## Z represents ##STR23## and A represents an alkyl group or an alkoxy group each of 1˜10 carbon atoms.
Claim 2
Dependent Claim
71 words
A pyridine derivative expressed by the formula R--X--COO--Y--CH.sub.2 CH.sub.2 --Z--A (I) wherein R represents an alkyl group or an alkoxy group each of 1˜10 carbon atoms; X represents ##STR18## Y represents ##STR19## when Y is ##STR20## Z represents ##STR21## and A represents F, Cl or a cyano group; and when Y is ##STR22## Z represents ##STR23## and A represents an alkyl group or an alkoxy group each of 1˜10 carbon atoms.
Claim 3
Dependent Claim
37 words
A pyridine derivative according to claim 1, expressed by the formula ##STR24## wherein R represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms and A represents F, Cl or cyano group.
Claim 4
Dependent Claim
37 words
A pyridine derivative according to claim 1, expressed by the formula ##STR25## wherein R represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms and A represents F, Cl or cyano group.
Claim 5
Dependent Claim
33 words
A pyridine derivative according to claim 1, expressed by the formula ##STR26## wherein R and A both independently represent an alkyl group or an alkoxy group each of 1 to 10 carbon atoms.
Claim 6
Dependent Claim
32 words
A pyridine derivative according to claim 1, expressed by the formula ##STR27## wherein R and A both represent an alkyl group or an alkoxy group each of 1 to 10 carbon atoms.
Claim 7
Dependent Claim
25 words
A liquid crystal composition having at least two components at least one of which is selected from the pyridine derivatives set forth in claim 1.
References Cited (Backward Citations)
US4212762A
Cited
JPS5479185A
Cited
US4222888A
Cited
US4256656A
Cited
GB2092169A
Cited
US4419263A
Cited
EP0056501A2
Cited
US4480117A
Cited
US4526704A
Cited
JPS5980635A
Cited
JPS59110652A
Cited
JPS59110651A
Cited
JPS60149564A
Cited
EP0149238A2
Cited
EP0149208A2
Cited
JPS60163865A
Cited
DE3510735A1
Cited
GB2161808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |