Patent US4661283A successfully refreshed from Google Patents.
US4661283A
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Benzoate derivatives having a large positive dielectric anisotropy value and liquid crystal compositions containing same
Assignee: JNC Corp
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Filing: 1985-02-28
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Granted: 1987-04-28
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Expires: 2005-02-28
Abstract
Abstract A novel organic compound usable as a component of liquid crystal compositions having a positive value of dielectric anisotropy and a liquid crystal composition usable as a material for liquid-crystalline display devices operated under a low driving voltage are provided which compound is a benzoic acid ester derivative expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbons and X represents ##STR2##
Inventors
- 👤 Shigeru Sugimori
- 👤 Yasuyuki Goto
- 👤 Toyoshiro Isoyama
- 👤 Kazunori Nigorikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:51
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
A benzoic acid ester derivative expressed by the formula ##STR15## wherein R represents an alkyl group of 1 to 10 carbon atoms and X represents ##STR16##
Claim 2
Dependent Claim
26 words
A benzoic acid ester derivative expressed by the formula ##STR15## wherein R represents an alkyl group of 1 to 10 carbon atoms and X represents ##STR16##
Claim 3
Dependent Claim
15 words
A 3-fluoro-4-cyanophenyl 4-alkoxymethylbenzoate according to claim 1 wherein X represents ##STR17## in the formula (I).
Claim 4
Dependent Claim
15 words
A 3-fluoro-4-cyanophenyl 4-(trans-4-alkoxymethylcyclohexyl)-benzoate according to claim 1 wherein X represents ##STR18## in the formula (I).
Claim 5
Dependent Claim
42 words
A liquid crystal composition having at least two components at least one of which is selected from benzoic acid ester derivatives expressed by the formula ##STR19## wherein R represents an alkyl group of 1 to 10 carbon atoms and X represents ##STR20##
Claim 6
Dependent Claim
42 words
A liquid crystal composition having at least two components at least one of which is selected from benzoic acid ester derivatives expressed by the formula ##STR19## wherein R represents an alkyl group of 1 to 10 carbon atoms and X represents ##STR20##
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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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |