US3974087A
Expired / Lapsed
US
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Liquid crystal compositions
Assignee: UK Secretary of State for Defence
•
Filing: 1974-03-15
•
Granted: 1976-08-10
•
Expires: 1994-03-15
Abstract
Abstract A range of eutectic mixtures containing at least three compounds having the formula ##SPC1## Where X 1 is an alkyl group, an alkoxy group or a substituted phenyl group ##SPC2## Where R is an alkyl or alkoxy group, are described. The eutectic mixtures extend the temperature ranges over which their constituent compounds exhibit liquid crystal properties and are thus useful in liquid crystal devices operating in those temperature ranges.
Inventors
- 👤 George William Gray
- 👤 Kenneth John Harrison
- 👤 David Sanderson Hulme
- 👤 Edward Peter Raynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C07; C07C; C07C205/00; C07C205/06; C07C205/07; C07C205/11; C07C205/12; C07C205/27; C07C205/35; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
79 words
A liquid crystal material consisting of an eutectic mixture of at least three compounds having the formula ##SPC8## wherein x 1 is selected from the group consisting of an alkyl group, an alkoxy group, a substituted phenyl group ##SPC9## wherein R 1 represents an alkyl group, and a substituted phenyl group ##SPC10## where R 2 represents an alkoxy group, the total number of carbon atoms in the alkyl or alkoxy moieties of X 1 ranging from 3 to 9.
Claim 2
Dependent Claim
79 words
A liquid crystal material consisting of an eutectic mixture of at least three compounds having the formula ##SPC8## wherein x 1 is selected from the group consisting of an alkyl group, an alkoxy group, a substituted phenyl group ##SPC9## wherein R 1 represents an alkyl group, and a substituted phenyl group ##SPC10## where R 2 represents an alkoxy group, the total number of carbon atoms in the alkyl or alkoxy moieties of X 1 ranging from 3 to 9.
Claim 3
Dependent Claim
59 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11
55
n-C.sub.5 H.sub.11 O
15
n-C.sub.7 H.sub.15 O
13
n-C.sub.8 H.sub.17 O
17
______________________________________
Claim 4
Dependent Claim
59 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.7 H.sub.15
44
n-C.sub.5 H.sub.11 O
19
n-C.sub.7 H.sub.15 O
16
n-C.sub.8 H.sub.17 O
21
______________________________________
Claim 5
Dependent Claim
63 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.7 H.sub.15
36
n-C.sub.3 H.sub.7 O
18
n-C.sub.5 H.sub.11 O
15
n-C.sub.7 H.sub.15 O
12
n-C.sub.8 H.sub.17 O
19
______________________________________
Claim 6
Dependent Claim
63 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11
49
n-C.sub.3 H.sub.7 O
15
n-C.sub.5 H.sub.11 O
12
n-C.sub.7 H.sub.15 O
10
n-C.sub.8 H.sub.17 O
14
______________________________________
Claim 7
Dependent Claim
56 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11
32
n-C.sub.6 H.sub.13
28
n-C.sub.7 H.sub.15
15
n-C.sub.8 H.sub.17
25
______________________________________
Claim 8
Dependent Claim
63 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.6 H.sub.13
49
n-C.sub.3 H.sub.7 O
15
n-C.sub.5 H.sub.11 O
12
n-C.sub.7 H.sub.15 O
10
n-C.sub.8 H.sub.17 O
14
______________________________________
Claim 9
Dependent Claim
58 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11
48
n-C.sub.7 H.sub.15
29
n-C.sub.5 H.sub.11 O
12
n-C.sub.7 H.sub.15 O
11
______________________________________
Claim 10
Dependent Claim
52 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11
53
n-C.sub.7 H.sub.15
35
##STR4## 12
______________________________________
Claim 11
Dependent Claim
54 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.8 H.sub.17
60
n-C.sub.9 H.sub.19
20
n-C.sub.8 H.sub.17 O
20
______________________________________
Claim 12
Dependent Claim
55 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.7 H.sub.15
54
n-C.sub.5 H.sub.11 O
25
n-C.sub.7 H.sub.15 O
21
______________________________________
Claim 13
Dependent Claim
54 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11 O
33
n-C.sub.7 H.sub.15 O
27
##STR5## 40
______________________________________
Claim 14
Dependent Claim
58 words
A material as claimed in claim 1 and wherein the material is a mixture of compounds having the following respective groups X 1 , the compounds being in the following respective molar percentages: X.sup.1 Molar percentage (± 3%)
of compound containing X.sup.1
______________________________________
n-C.sub.5 H.sub.11 O
21
n-C.sub.7 H.sub.15 O
17
n-C.sub.8 H.sub.17 O
22
##STR6## 40
______________________________________
Claim 15
Dependent Claim
15 words
A mixture as claimed in claim 1 comprising a cyanoterphenyl and a plurality of cyanobiphenyls.
Claim 16
Dependent Claim
12 words
A mixture as claimed in claim 14 wherein said cyanoterphenyl is 4"-pentyl-4'-cyano-p-terphenyl.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |