Patent US4772416A successfully refreshed from Google Patents.
US4772416A
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Phenylpyridine derivative
Assignee: JNC Corp
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Filing: 1987-03-20
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Granted: 1988-09-20
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Expires: 2007-03-20
Abstract
Abstract A novel phenylpyridine derivative which exhibits a positive dielectric anisotropy and is useful as a component of liquid crystal materials and also has a broad temperature range of liquid crystal phases, a high clearing point and a superior compatibility with other liquid crystal compounds or liquid crystal compositions, and a composition containing the derivative are provided. The phenylpyridine derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms, X represents H or F; Y represents F, --CN or an alkyl group or an alkoxy group of 1 to 10 carbon atoms; and m represents 0 or 1.
Inventors
- 👤 Yasuyuki Goto
- 👤 Kazunori Nigorikawa
- 👤 Toyoshiro Isoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:42
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/24; C07D213/26; C07D213/54; C07D213/57; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/3444
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A fluorophenylpyridine compound of the formula: ##STR16## wherein R represents an alkyl group of 1 to 10 carbon atoms and X represents a fluorine or hydrogen atom.
Claim 2
Dependent Claim
27 words
A fluorophenylpyridine compound of the formula: ##STR16## wherein R represents an alkyl group of 1 to 10 carbon atoms and X represents a fluorine or hydrogen atom.
Claim 3
Dependent Claim
13 words
A 5-(trans-4-alkylcyclohexyl)-2-(4-fluorophenyl)pyridine compound according to claim 1, wherein X represents a hydrogen atom.
Claim 4
Dependent Claim
7 words
A 5-(trans-4-alkylcyclohexyl)-2-(3,4-difluorophenyl)pyridine compound according to claim 1.
Claim 5
Dependent Claim
22 words
A liquid cryustal composition containing at least two components, at least one of which is a fluorophenylpyridine compound according to claim 1.
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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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |