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US4012434A
Expired / Lapsed
US
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Nematic compounds and mixtures
Assignee: Merck Patent GmbH
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Filing: 1975-10-24
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Granted: 1977-03-15
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Expires: 1995-10-24
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
2026-11-01 11:55
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
37 words
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, R 2 is straight-chain alkyl or straight-chain alkoxy of 1-7 carbon atoms.
Claim 2
Dependent Claim
37 words
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, R 2 is straight-chain alkyl or straight-chain alkoxy of 1-7 carbon atoms.
Claim 3
Dependent Claim
18 words
A compound according to claim 1, wherein R 1 and R 2 are alkyl of 2-7 carbon atoms.
Claim 4
Dependent Claim
20 words
A compound according to claim 1, wherein R 1 is alkoxy and R 2 is alkyl of 2-7 carbon atoms.
Claim 5
Dependent Claim
20 words
A compound according to claim 1, wherein R 1 is alkyl of 2-7 carbon atoms and R 2 is alkoxy.
Claim 6
Dependent Claim
20 words
A compound according to claim 1, wherein R 1 is alkanoyloxy and R 2 is alkyl of 2-7 carbon atoms.
Claim 7
Dependent Claim
37 words
A compound of claim 4 selected from the group consisting of 4'-methoxyphenyl ester of 4-(4-ethylbenzoyloxy)-benzoic acid, 4'-butoxyphenyl ester of 4-(4-ethylbenzoyloxy)-benzoic acid, 4'-methoxyphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid, 4'-butoxyphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid and 4'-hexoxyphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid.
Claim 8
Dependent Claim
52 words
A compound of claim 2 selected from the group consisting of 4'-methylphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid, 4'-butylphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid, 4'-hexylphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid, 4'-ethylphenyl ester of 4-(4-hexylbenzoyloxy)-benzoic acid, 4'-butylphenyl ester of 4-(4-hexylbenzoyloxy)-benzoic acid, 4'-hexylphenyl ester of 4-(4-hexylbenzoyloxy)-benzoic acid, 4'-ethylphenyl ester of 4-(4-ethylbenzoyloxy)-benzoic acid and 4'-butylphenyl ester of 4-(4-ethylbenzoyloxy)-benzoic acid.
Claim 9
Dependent Claim
47 words
A compound of claim 3 selected from the group consisting of 4'-ethylphenyl ester of 4-anisoyloxybenzoic acid, 4'-propylphenyl ester of 4-anisoyloxybenzoic acid, 4'-heptylphenyl ester of 4-anisoyloxybenzoic acid, 4'-ethylphenyl ester of 4-(4-ethoxybenzoyloxy)-benzoic acid, 4'-butylphenyl ester of 4-(4-butoxybenzoyloxy)-benzoic acid, 4'-methylphenyl ester of 4-(4-hexoxybenzoyloxy)-benzoic acid and 4'-butylphenyl ester of 4-(4-hexoxybenzoyloxy)-benzoic acid.
Claim 10
Dependent Claim
37 words
A compound of claim 1 selected from the group consisting of 4'-ethoxyphenyl ester of 4-anisoyloxybenzoic acid, 4'-butoxyphenyl ester of 4-(4-ethoxybenzoyloxy)-benzoic acid, 4'-hexoxyphenyl ester of 4-(4-butoxybenzoyloxy)-benzoic acid, 4'-methoxyphenyl ester of 4-(4-hexoxybenzoyloxy)-benzoic acid and 4'-hexoxyphenyl ester of 4-(4-hexoxybenzoyloxy)-benzoic acid.
Claim 11
Dependent Claim
10 words
The compound of claim 1, 4'-butylphenyl ester of 4-anisoyloxybenzoic acid.
Claim 12
Dependent Claim
10 words
The compound of claim 1, 4'-butylphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid.
Claim 13
Dependent Claim
10 words
The compound of claim 1, 4'-hexoxyphenyl ester of 4-(4-butylbenzoyloxy)-benzoic acid.
References Cited (Backward Citations)
US1974689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |