US4323472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal admixture
Assignee: Timex Group USA Inc
•
Filing: 1980-12-11
•
Granted: 1982-04-06
•
Expires: 2000-12-11
Abstract
Abstract The invention provides a nematic liquid crystal composition useful in electrooptical display devices for its broad nematic temperature range, low electrical threshold and saturation voltages, steep electrooptical saturation curve and low viscosity. The admixture typically comprises: ______________________________________ Weight %
______________________________________
4-heptylphenyl-4'-butylcyclohexane carboxylate
20-40
4-cyanophenyl-4'-propylcyclohexane carboxylate
8-20
4-cyanophenyl-4'-butylcyclohexane carboxylate
8-20
4-cyanophenyl-4'-pentylcyclohexane carboxylate
8-20
5-butyl-2-cyanophenyl-1,3 dioxane
10-40
4-cyanophenyl-4"-pentyl-4'-cyclohexyl benzoate
2-10
4-cyanophenyl-4"-heptyl-4'-cyclohexyl benzoate
2-10
chiral additive 0.1-0.8
______________________________________
Inventors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:37
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A nematic liquid crystal composition comprising: ______________________________________
4-heptylphenyl-4'-butylcyclohexane carboxylate
20-40 weight %
4-cyanophenyl-4'-propylcyclohexane carboxylate
8-20 weight %
4-cyanophenyl-4'-butylcyclohexane carboxylate
8-20 weight %
4-cyanophenyl-4'-pentylcyclohexane carboxylate
8-20 weight %
5-butyl-2-cyanophenyl-1,3-dioxane
10-40 weight %
4-cyanophenyl-4"-pentyl-4'-cyclohexyl benzoate
2-10 weight %
4-cyanophenyl-4"-heptyl-'-cyclohexyl benzoate
2-10 weight %
______________________________________
Claim 2
Dependent Claim
42 words
A nematic liquid crystal composition comprising: ______________________________________
4-heptylphenyl-4'-butylcyclohexane carboxylate
20-40 weight %
4-cyanophenyl-4'-propylcyclohexane carboxylate
8-20 weight %
4-cyanophenyl-4'-butylcyclohexane carboxylate
8-20 weight %
4-cyanophenyl-4'-pentylcyclohexane carboxylate
8-20 weight %
5-butyl-2-cyanophenyl-1,3-dioxane
10-40 weight %
4-cyanophenyl-4"-pentyl-4'-cyclohexyl benzoate
2-10 weight %
4-cyanophenyl-4"-heptyl-'-cyclohexyl benzoate
2-10 weight %
______________________________________
Claim 3
Dependent Claim
18 words
The composition of claim 1 including a chiral additive in the amount of 0.1 to 0.8 weight percent.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein the chiral additive is cholesteryl nonanoate.
Claim 5
Dependent Claim
12 words
An electrooptical display including the nematic liquid crystal composition of claim 1.
Claim 6
Dependent Claim
46 words
A nematic liquid crystal admixture having the following nominal composition: ______________________________________
4-heptylphenyl-4'-butylcyclohexane carboxylate
29.0 weight %
4-cyanophenyl-4'-propylcyclohexane carboxylate
13.5 weight %
4-cyanophenyl-4'-butylcyclohexane carboxylate
10.4 weight %
4-cyanophenyl-4'-pentylcyclohexane carboxylate
13.5 weight %
5-butyl-2-cyanophenyl-1,3-dioxane
24.0 weight %
4-cyanophenyl-4"-pentyl-4'-cyclohexyl benzoate
4.8 weight %
4-cyanophenyl-4"-heptyl-4'-cyclohexyl benzoate
4.8 weight %
______________________________________
Claim 7
Dependent Claim
46 words
A nematic liquid crystal admixture having the following nominal composition: ______________________________________
4-heptylphenyl-4'-butylcyclohexane carboxylate
29.0 weight %
4-cyanophenyl-4'-propylcyclohexane carboxylate
13.5 weight %
4-cyanophenyl-4'-butylcyclohexane carboxylate
10.4 weight %
4-cyanophenyl-4'-pentylcyclohexane carboxylate
13.5 weight %
5-butyl-2-cyanophenyl-1,3-dioxane
24.0 weight %
4-cyanophenyl-4"-pentyl-4'-cyclohexyl benzoate
4.8 weight %
4-cyanophenyl-4"-heptyl-4'-cyclohexyl benzoate
4.8 weight %
______________________________________
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage |
Window Opens |
Payment Deadline |
Surcharge Period Until |
Estimated Fee |
Status |
| 3.5 Years (Year 4) |
1985-04-05 |
1985-10-05 |
1986-04-06 |
$2000.00 |
Window Closed / Lapsed
|
| 7.5 Years (Year 8) |
1989-04-05 |
1989-10-05 |
1990-04-06 |
$3760.00 |
Window Closed / Lapsed
|
| 11.5 Years (Year 12) |
1993-04-05 |
1993-10-05 |
1994-04-06 |
$7700.00 |
Window Closed / Lapsed
|