US4415470A
Expired / Lapsed
US
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Liquid crystalline fluorine-containing cyclohexylbiphenyls and dielectrics and electro-optical display elements based thereon
Assignee: Merck Patent GmbH
•
Filing: 1981-11-10
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Granted: 1983-11-15
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Expires: 2001-11-10
Abstract
Abstract A Cyclohexylbiphenyl of the formula ##STR1## wherein R 1 is alkyl of 1-12 C atoms; R 6 is alkyl or alkoxy each of 1-12 C atoms, CN or fluorine; and R 2 , R 3 , R 4 and R 5 each is hydrogen or fluorine, with the proviso that at least one, but not more than two of R 2 , R 3 , R 4 , R 5 and R 6 are fluorine.
Inventors
- 👤 Rudolf Eidenschink
- 👤 Ludwig Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:07
CPC Classifications
C; C07; C07C; C07C25/00; C07C25/18; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A cyclohexylbiphenyl of the formula ##STR10## wherein R 1 is alkyl of 1-12 C atoms; R 6 is alkyl or alkoxy each of 1-12 C atoms, CN or fluorine; and R 2 , R 3 , R 4 and R 5 each is hydrogen or fluorine, with the proviso that at least one of R 4 and R 5 is fluorine, but not more than two of R 2 , R 3 , R 4 , R 5 and R 6 are fluorine.
Claim 2
Dependent Claim
83 words
A cyclohexylbiphenyl of the formula ##STR10## wherein R 1 is alkyl of 1-12 C atoms; R 6 is alkyl or alkoxy each of 1-12 C atoms, CN or fluorine; and R 2 , R 3 , R 4 and R 5 each is hydrogen or fluorine, with the proviso that at least one of R 4 and R 5 is fluorine, but not more than two of R 2 , R 3 , R 4 , R 5 and R 6 are fluorine.
Claim 3
Dependent Claim
31 words
A compound of claim 1 of the formula ##STR11## wherein R 1 is alkyl of 1-12 C atoms and R 7 is alkyl or alkoxy of 1-12 C atoms or CN.
Claim 4
Dependent Claim
18 words
A compound of claim 1 of the formula ##STR12## wherein R 1 is alkyl of 1-12 C atoms.
Claim 5
Dependent Claim
31 words
A compound of claim 1 of the formula ##STR13## wherein R 1 is alkyl of 1-12 C atoms and R 7 is alkyl or alkoxy of 1-12 C atoms or CN.
Claim 6
Dependent Claim
20 words
A liquid-crystalline dielectric comprising two or more liquid-crystalline components, wherein at least one component is a cyclohexylbiphenyl of claim 1.
Claim 7
Dependent Claim
18 words
A liquid-crystalline dielectric of claim 5 wherein the amount of the cyclohexylbiphenyl is up to 50 wt. percent.
Claim 8
Dependent Claim
16 words
An electro-optical display element having a liquid crystal cell comprising a liquid-crystalline dielectric of claim 5.
Claim 9
Dependent Claim
14 words
A compound of claim 1 wherein R 2 and R 3 are each hydrogen.
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |