Patent US4130502A successfully refreshed from Google Patents.
US4130502A
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Liquid crystalline cyclohexane derivatives
Assignee: Merck Patent GmbH
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Filing: 1977-08-10
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Granted: 1978-12-19
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Expires: 1997-08-10
Abstract
Abstract Novel liquid crystals have the formula ##STR1## wherein one of R 1 and R 2 is cyano and the other is R, OR, OCOR or OCOOR, in which R is alkyl containing up to 12 carbon atoms. The novel compounds can be used alone and in mixtures with each other and/or other conventional liquid crystals.
Inventors
- 👤 Rudolf Eidenschink
- 👤 Joachim Krause
- 👤 Ludwig Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:22
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C07; C07C; C07C43/00; C07C43/02; C07C43/18; C07C43/188; C07C45/00; C07C45/27; C07C45/29; C07C45/292; C07C45/45; C07C45/455; C07C45/46; C07C49/00; C07C49/385; C07C49/403; C07C49/527; C07C49/563; C07C49/76; C07C49/782; C07C49/792; C07C63/00; C07C63/33; C07C63/49; C07F; C07F5/00; C07F5/003; C09K2019/3009; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
30 words
Compounds of the formula: ##STR8## wherein R 2 is cyano and R 1 is R, OR, OCOR or OCOOR, in which R is alkyl of up to 12 carbon atoms.
Claim 2
Dependent Claim
30 words
Compounds of the formula: ##STR8## wherein R 2 is cyano and R 1 is R, OR, OCOR or OCOOR, in which R is alkyl of up to 12 carbon atoms.
Claim 3
Dependent Claim
9 words
A compound of claim 1, wherein R is straight-chained.
Claim 4
Dependent Claim
17 words
A compound of claim 1, wherein R is a branched alkyl radical with only one chain branching.
Claim 5
Dependent Claim
12 words
A compound of claim 1, wherein R 1 is R or OR.
Claim 6
Dependent Claim
8 words
The compound of claim 1 which is 4-n-pentyl-1-(4-cyanophenyl)-cyclohexane.
Claim 7
Dependent Claim
8 words
The compound of claim 1 which is 4-n-propyl-1-(4-cyanophenyl)-cyclohexane.
Claim 8
Dependent Claim
8 words
The compound of claim 1 which is 4-n-butyl-1-(4-cyanophenyl)-cyclohexane.
Claim 9
Dependent Claim
8 words
The compound of claim 1 which is 4-n-hexyl-1-(4-cyanophenyl)-cyclohexane.
Claim 10
Dependent Claim
8 words
The compound of claim 1 which is 4-n-heptyl-1-(4-cyanophenyl)-cyclohexane.
Claim 11
Dependent Claim
8 words
The compound of claim 1 which is 4-n-butyloxy-1-(4-cyanophenyl)-cyclohexane.
Claim 12
Dependent Claim
8 words
The compound of claim 1 which is 4-n-pentanoyloxy-1-(4-cyanophenyl)-cyclohexane.
Claim 13
Dependent Claim
16 words
A mixed liquid crystalline dielectric composition containing at least 40% of a compound of claim 1.
References Cited (Backward Citations)
US3947375A
Cited
US4029595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |