Patent US4366330A successfully refreshed from Google Patents.
US4366330A
Expired / Lapsed
US
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Intermediates useful in the production of liquid crystal compounds
Assignee: BDH Chemicals Ltd
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Filing: 1980-09-30
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Granted: 1982-12-28
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Expires: 2000-09-30
Abstract
Abstract An intermediate useful in the production of liquid crystal esters has a molecular structure ##STR1## in which of the groups R' and R" one is fluorine and the other is hydrogen, and in which R is an alkyl group having more than one carbon atom, an aryl substituted alkyl group or a cyclohexyl substituted alkyl group. These compounds may be prepared from the corresponding alkoxy compounds ##STR2## where R'" is a protective alkyl group such as methyl. These compounds may be used in the production of liquid crystal esters by a conventional esterification with carboxylic acids, or acid derivative, eg chloride, eg containing the radical ##STR3## where X is an alkyl group and ##STR4## is a benzene or cyclohexane ring.
Inventors
- 👤 George W. Gray
- 👤 David Lacey
- 👤 John A. Jenner
- 👤 Martin G. Pellatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:45
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/055; C07C39/00; C07C39/24; C07C39/26; C07C39/27; C07C39/367; C07C39/42; C07C41/00; C07C41/01; C07C41/18; C07C41/30; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K2019/2035; C09K2019/3075
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
A phenol which is adapted for reaction with an aryl or cycloalkyl carboxylic acid to produce an ester having a dielectric anistropy which adapts it for a liquid crystal material for electro-optical display devices and having the formula ##STR15## wherein one of R' and R" is fluorine and the other is hydrogen and R is an alkyl group having from 3 to 11 carbon atoms, an aryl substituted alkyl group, or a cyclohexyl substituted alkyl group.
Claim 2
Dependent Claim
76 words
A phenol which is adapted for reaction with an aryl or cycloalkyl carboxylic acid to produce an ester having a dielectric anistropy which adapts it for a liquid crystal material for electro-optical display devices and having the formula ##STR15## wherein one of R' and R" is fluorine and the other is hydrogen and R is an alkyl group having from 3 to 11 carbon atoms, an aryl substituted alkyl group, or a cyclohexyl substituted alkyl group.
Claim 3
Dependent Claim
13 words
The phenol of claim 1 wherein R' is fluorine and R" is hydrogen.
Claim 4
Dependent Claim
13 words
The phenol of claim 1 wherein R' is hydrogen and R" is fluorine.
Claim 5
Dependent Claim
13 words
The phenol of claim 1 wherein R is n-C 3 H 7 .
Claim 6
Dependent Claim
13 words
The phenol of claim 1 wherein R is n-C 4 H 9 .
Claim 7
Dependent Claim
13 words
The phenol of claim 1 wherein R is n-C 5 H 11 .
Claim 8
Dependent Claim
13 words
The phenol of claim 1 wherein R is n-C 6 H 13 .
Claim 9
Dependent Claim
13 words
The phenol of claim 1 wherein R is n-C 7 H 15 .
Claim 10
Dependent Claim
9 words
The phenol of claim 1 wherein R is (+)-2-methylbutyl.
Claim 11
Dependent Claim
13 words
The phenol of claim 3 wherein R is n-C 3 H 7 .
Claim 12
Dependent Claim
13 words
The phenol of claim 3 wherein R is n-C 4 H 9 .
Claim 13
Dependent Claim
13 words
The phenol of claim 3 wherein R is n-C 5 H 11 .
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |