US4710315A
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US
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Anisotropic compounds and liquid crystal mixtures therewith
Assignee: Merck Patent GmbH
•
Filing: 1985-04-13
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Granted: 1987-12-01
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Expires: 2005-04-13
Abstract
Abstract Anisotropic compounds of the formula (1) specified in claim 1 are suitable, owing to their low Δε/ε⊥ values for liquid crystal displays which have high information densities of for examples up to 10 6 image dots and accordingly need to be highly multiplexible; compared with known compounds they offer improved application properties and are relatively simple to synthesize.
Inventors
- 👤 Hans P. Schad
- 👤 Stephen M. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
C; C07; C07C; C07C25/00; C07C25/02; C07C25/13; C07C17/00; C07C17/093; C07C17/18; C07C25/18; C07C255/00; C07C255/49; C07C255/54; C09; C09K; C09K19/00; C09K19/02; C09K19/0208; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/14; C09K19/20; C09K19/30; C09K19/3001; C09K19/3028; C09K19/3066; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
109 words
A compound of the formula ##STR15## in which R is an alkyl, alkoxy, or alkanoyloxy group which has in each case 1-12 C atoms in the alkyl moiety and which has a straight or branched and chiral or non-chiral chain, X 2 and X 3 are independently hydrogen, halogen or nitrile, X 4 is halogen or nitrile, Z is the ether oxygen bridge --O-- and m and n are independently 0, 1 or 2 with the provisos that (a) the sum of n and m is at least 1 and at most 3, and (b) at least one of the groups X 2 and X 3 is not hydrogen.
Claim 2
Dependent Claim
109 words
A compound of the formula ##STR15## in which R is an alkyl, alkoxy, or alkanoyloxy group which has in each case 1-12 C atoms in the alkyl moiety and which has a straight or branched and chiral or non-chiral chain, X 2 and X 3 are independently hydrogen, halogen or nitrile, X 4 is halogen or nitrile, Z is the ether oxygen bridge --O-- and m and n are independently 0, 1 or 2 with the provisos that (a) the sum of n and m is at least 1 and at most 3, and (b) at least one of the groups X 2 and X 3 is not hydrogen.
Claim 3
Dependent Claim
16 words
A compound according to claim 1, wherein R is an alkyl group having 1-12 C atoms.
Claim 4
Dependent Claim
14 words
A compound according to claim 1 or 2, wherein halogen is fluorine or chlorine.
Claim 5
Dependent Claim
23 words
A compound according to claim 1, wherein one of X 2 , X 3 is a halogen atom and the other is hydrogen.
Claim 6
Dependent Claim
35 words
A compound according to claim 1, of the formula ##STR16## in which R, X 2 , X 3 and X 4 have the meaning specified in claim 1 and m 1 if 0 or 1.
Claim 7
Dependent Claim
16 words
A compound according to claim 5, wherein R is an alkyl group having 1-12 C atoms.
Claim 8
Dependent Claim
32 words
A compound according to claim 5 or 6, wherein X 4 is a nitrile group and one of X 2 , X 3 is a halogen atom and the other is hydrogen.
Claim 9
Dependent Claim
13 words
A compound according to claim 5 or 6, wherein X 2 is fluorine.
Claim 10
Dependent Claim
15 words
A compound according to claim 6 or 7, wherein X 3 is fluorine or chlorine.
Claim 11
Dependent Claim
29 words
A compound according to claim 1, of the formula ##STR17## in which R, X 2 , and X 3 and X 4 have the meaning specified in claim 1.
Claim 12
Dependent Claim
16 words
A compound according to claim 10, wherein R is an alkyl group having 1-12 C atoms.
Claim 13
Dependent Claim
32 words
A compound according to claim 10 or 11, wherein X 4 is a nitrile group and one of X 2 , X 3 is a halogen atom and the other is hydrogen.
Claim 14
Dependent Claim
13 words
A compound according to claim 10 or 11 wherein X 2 is fluorine.
Claim 15
Dependent Claim
15 words
A compound according to claim 10 or 11 wherein X 3 is fluorine or chlorine.
Claim 16
Dependent Claim
26 words
In a liquid crystal mixture having at least two liquid crystal components; the improvement wherein at least one such component is a compound of claim 1.
Claim 17
Dependent Claim
25 words
In an electro-optical display element with multiplex operation comprising a liquid crystal mixture as dielectric, the improvement wherein the mixture is one of claim 15.
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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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |