US4001137A
Expired / Lapsed
US
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Nematic compounds and mixtures
Assignee: Merck Patent GmbH
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Filing: 1975-06-24
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Granted: 1977-01-04
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Expires: 1995-06-24
Abstract
Abstract Compounds of the general formula ##STR1## wherein n is 0, 1 or 2, R 1 is straight-chain alkyl or alkoxy of 1-7 carbon atoms or straight-chain alkanoyloxy of 2-7 carbon atoms, and R 2 is straight-chain alkyl or alkoxy of 1-7 carbon atoms with the proviso that when n is 0, R 1 and R 2 together contain at least 4 carbon atoms, which form nematic phases, can be produced by reacting a phenol of the general formula ##STR2## WHEREIN R 2 has the values given above, and p is 0, 1 or 2 or a corresponding phenolate, with an aromatic carboxylic acid of the general formula ##STR3## WHEREIN R 1 has the values given above, and q is 0, 1 or 2, and the sum p + q is n, or with a reactive derivative of this acid.
Inventors
- 👤 Ralf Steinstrasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:28
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
A nematic mixture of liquid crystalline compounds, at least one of which is (a) a compound of the formula: ##STR13## wherein R 1 is straight-chain alkyl or straight-chain alkoxy of 1-7 carbon atoms or straight-chain alkanoyloxy of 2-7 carbon atoms and R 2 is straight-chain alkyl or straight-chain alkoxy of 1-7 carbon atoms, or (b) a member of the group consisting of 4'-pentoxyphenyl ester of 4-propylbenzoic acid, 4'-hexoxyphenyl and 4'-heptoxyphenyl esters of 4-butylbenzoic acid, 4'-pentoxyphenyl ester of 4-pentylbenzoic acid, 4'-butoxyphenyl, 4'-pentoxyphenyl, 4'-hexoxyphenyl and 4'-heptoxyphenyl esters of 4-hexylbenzoic acid, 4'-pentylphenyl ester of anisic acid, 4'-butylphenyl and 4'-pentylphenyl esters of 4-pentoxybenzoic acid, and 4'-propylphenyl, 4'-butylphenyl, 4'-pentylphenyl and 4'-hexylphenyl esters of 4-hexoxybenzoic acid.
Claim 2
Dependent Claim
110 words
A nematic mixture of liquid crystalline compounds, at least one of which is (a) a compound of the formula: ##STR13## wherein R 1 is straight-chain alkyl or straight-chain alkoxy of 1-7 carbon atoms or straight-chain alkanoyloxy of 2-7 carbon atoms and R 2 is straight-chain alkyl or straight-chain alkoxy of 1-7 carbon atoms, or (b) a member of the group consisting of 4'-pentoxyphenyl ester of 4-propylbenzoic acid, 4'-hexoxyphenyl and 4'-heptoxyphenyl esters of 4-butylbenzoic acid, 4'-pentoxyphenyl ester of 4-pentylbenzoic acid, 4'-butoxyphenyl, 4'-pentoxyphenyl, 4'-hexoxyphenyl and 4'-heptoxyphenyl esters of 4-hexylbenzoic acid, 4'-pentylphenyl ester of anisic acid, 4'-butylphenyl and 4'-pentylphenyl esters of 4-pentoxybenzoic acid, and 4'-propylphenyl, 4'-butylphenyl, 4'-pentylphenyl and 4'-hexylphenyl esters of 4-hexoxybenzoic acid.
Claim 3
Dependent Claim
16 words
A nematic mixture according to claim 1 containing at least two compounds of (a) or (b).
Claim 4
Dependent Claim
68 words
A nematic mixture according to claim 1 wherein the mixture comprises at least two members of the group consisting of 4'-pentoxyphenyl ester of 4-propylbenzoic acid, 4'-hexoxyphenyl and 4'-heptoxyphenyl esters of 4-butylbenzoic acid, 4'-pentoxyphenyl ester of 4-pentylbenzoic acid, 4'-butoxyphenyl, 4'-pentoxyphenyl, 4'-hexoxyphenyl and 4'-heptoxyphenyl esters of 4-hexylbenzoic acid, 4'-pentylphenyl ester of anisic acid, 4'-butylphenyl and 4'-pentylphenyl esters of 4-pentoxybenzoic acid, and 4'-propylphenyl, 4'-butylphenyl, 4'-pentylphenyl and 4'-hexylphenyl esters of 4-hexoxybenzoic acid.
Claim 5
Dependent Claim
17 words
A nematic mixture according to claim 1 wherein the mixture comprises at least two compounds of (a).
Claim 6
Dependent Claim
21 words
A nematic mixture according to claim 4 wherein R 1 and R 2 both are straight-chain alkyl of 2-7 carbon atoms.
Claim 7
Dependent Claim
23 words
A nematic mixture according to claim 4 wherein R 1 is straight-chain alkoxy and R 2 is straight-chain alkyl of 2-7 carbon atoms.
Claim 8
Dependent Claim
22 words
A nematic mixture of claim 4 wherein R 1 is straight-chain alkyl of 2-7 carbon atoms and R 2 is straight-chain alkoxy.
Claim 9
Dependent Claim
23 words
A nematic mixture according to claim 4 wherein R 1 is straight-chain alkanoyloxy and R 2 is straight-chain alkyl of 2-7 carbon atoms.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
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