Patent US2285855A successfully refreshed from Google Patents.
Patent US4082637A successfully refreshed from Google Patents.
US4464283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal composition
Assignee: Merck Patent GmbH
•
Filing: 1982-07-08
•
Granted: 1984-08-07
•
Expires: 2002-07-08
Abstract
Abstract A liquid crystal composition comprising trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, trans-4-n-pentyl-(4' -ethylbiphenyl-4)cyclohexane, trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl)benzoate, and 4-(trans-4-n-pentyl-cyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl is drivable over a wide temperature range and can be operated rapidly at low temperatures.
Inventors
- 👤 Shinji Hasegawa
- 👤 Kazuhisa Toriyama
- 👤 Ludwig Pohl
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:35
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
A liquid crystal composition comprising 29 to 36 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 28to 35 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 14 to 18 mole % trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 4 to 7 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 3 to 7 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 5 to 8 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl) -biphenyl; the total amount of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane and trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane being 64 mole % or more.
Claim 2
Dependent Claim
61 words
A liquid crystal composition comprising 29 to 36 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 28to 35 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 14 to 18 mole % trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 4 to 7 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 3 to 7 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 5 to 8 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl) -biphenyl; the total amount of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane and trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane being 64 mole % or more.
Claim 3
Dependent Claim
36 words
A liquid crystal composition comprising 32 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 33 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 16 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 6 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 6mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 7 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 4
Dependent Claim
36 words
A liquid crystal composition comprising 32 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 33 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 16 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 6 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 6mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 7 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 5
Dependent Claim
37 words
A liquid crystal composition comprising 36 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 29 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 14.5 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 4.5 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 5 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 8 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 6
Dependent Claim
37 words
A liquid crystal composition comprising 36 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 29 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 14.5 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 4.5 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 5 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 8 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 7
Dependent Claim
36 words
A liquid crystal composition comprising 36mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 29 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 17 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 5.5 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 5 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 7.5 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 8
Dependent Claim
36 words
A liquid crystal composition comprising 36mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 29 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 17 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 5.5 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 5 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 7.5 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 9
Dependent Claim
33 words
A liquid crystal composition comprising 30.5 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 35 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 18 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 6.5 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 35 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 6.
Claim 10
Dependent Claim
33 words
A liquid crystal composition comprising 30.5 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 35 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 18 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 6.5 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 35 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 6.
Claim 11
Dependent Claim
5 words
5 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 12
Dependent Claim
5 words
5 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 13
Dependent Claim
37 words
A liquid crystal composition comprising 32 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 34 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 18 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 7 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 4 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 5 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
Claim 14
Dependent Claim
37 words
A liquid crystal composition comprising 32 mole % of trans-4-n-propyl-(4-ethylphenyl)-cyclohexane, 34 mole % of trans-4-n-pentyl-(4-cyanophenyl)-cyclohexane, 18 mole % of trans-4-n-pentyl-(4'-ethylbiphenyl-4)-cyclohexane, 7 mole % of trans-4-n-pentyl-(4'-cyanobiphenyl-4)-cyclohexane, 4 mole % of 4-n-propylphenyl-4-(trans-4-n-propylcyclohexyl) benzoate, and 5 mole % of 4-(trans-4-n-pentylcyclohexyl)-4'-(trans-4-n-propylcyclohexyl)-biphenyl.
References Cited (Backward Citations)
US4130502A
Cited
US4154697A
Cited
US4198130A
Cited
US4229315A
Cited
JPS5499785A
Cited
US4228030A
Cited
JPS562372A
Cited
US4330426A
Cited
US4331552A
Cited
JPS56118481A
Cited
JPS5718777A
Cited
JPS5718778A
Cited
JPS5721479A
Cited
JPS5734176A
Cited
GB2097418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |