US4592857A
Expired / Lapsed
US
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2,3-dicyano-5-substituted pyrazines
Assignee: JNC Corp
•
Filing: 1984-08-17
•
Granted: 1986-06-03
•
Expires: 2004-08-17
Abstract
Abstract Novel liquid crystal compounds having a positive dielectric anisotropy and liquid crystal compositions containing the same are provided, which liquid crystal compounds are 2,3-dicyano-5-substituted pyrazines expressed by the general formula ##STR1## wherein n represents 0 or 1; X represents R, ##STR2## in the case of n=0 and R, ##STR3## in the case of n=1; and R represents a linear chain alkyl group or an alkoxy group, each of 1 to 10 carbon atoms, and which liquid crystal compositions, when sealed in a TN cell, make it possible to operate the cell under a low threshold voltage and in a small consumption of electric power.
Inventors
- 👤 Shigeru Sugimori
- 👤 Yasuyuki Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:26
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/24; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3452
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
32 words
A 2,3-dicyano-5-substituted pyrazine expressed by the formula: ##STR27## wherein X represents R--, ##STR28## and R represents a linear chain alkyl group or an alkyloxy group, each of 1 to 10 carbon atoms.
Claim 2
Dependent Claim
32 words
A 2,3-dicyano-5-substituted pyrazine expressed by the formula: ##STR27## wherein X represents R--, ##STR28## and R represents a linear chain alkyl group or an alkyloxy group, each of 1 to 10 carbon atoms.
Claim 3
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X represents ##STR29##
Claim 4
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X represents ##STR30##
Claim 5
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR31##
Claim 6
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR32##
Claim 7
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR33##
Claim 8
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR34##
Claim 9
Dependent Claim
15 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is n-C 4 H 9 O--.
Claim 10
Dependent Claim
15 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is n-C 4 H 9 --.
Claim 11
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR35##
Claim 12
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR36##
Claim 13
Dependent Claim
11 words
The 2,3-dicyano-5-substituted pyrazine according to claim 1 wherein X is ##STR37##
Claim 14
Dependent Claim
46 words
A liquid crystal composition comprising at least one first substance having liquid crystal properties and at least one second substance having the formula: ##STR38## wherein X represents R--, ##STR39## said at least one second substance present in an amount effective to enhance said liquid crystal properties.
Claim 15
Dependent Claim
46 words
A liquid crystal composition comprising at least one first substance having liquid crystal properties and at least one second substance having the formula: ##STR38## wherein X represents R--, ##STR39## said at least one second substance present in an amount effective to enhance said liquid crystal properties.
Claim 16
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR40##
Claim 17
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR41##
Claim 18
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR42##
Claim 19
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR43##
Claim 20
Dependent Claim
16 words
The liquid crystal composition according to claim 13 wherein X is n-C 4 H 9 O--.
Claim 21
Dependent Claim
16 words
The liquid crystal composition according to claim 13 wherein X is n-C 4 H 9 --.
Claim 22
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR44##
Claim 23
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR45##
Claim 24
Dependent Claim
12 words
The liquid crystal composition according to claim 13 wherein X is ##STR46##
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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) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |