Patent US2768798A successfully refreshed from Google Patents.
Patent US4622164A successfully refreshed from Google Patents.
US4622164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicyclohexyls
Assignee: Merck Patent GmbH
•
Filing: 1984-06-14
•
Granted: 1986-11-11
•
Expires: 2004-06-14
Abstract
Abstract New bicyclohexyls of the formula I R1-Cy-Cy-R2 wherein R1 and R2 are each alkyl which has 1-10 C atoms and in which one or two CH2 group(s) can be replaced by O atoms, and Cy is 1,4-cyclohexylene, are suitable for use as the components of liquid-crystal dielectrics.
Inventors
- 👤 Rudolf Eidenschink
- 👤 Michael Romer
- 👤 Georg Weber
- 👤 George W. Gray
- 👤 Kenneth J. Toyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:18
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/115; C07C43/18; C07C43/184; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
In a liquid-crystal dielectric useful for electrooptical display elements and comprising at least two liquid-crystal components, the improvement wherein at least one component is a bicyclohexyl of the formula R.sup.1 --Cy--Cy--R.sup.2 wherein R 1 and R 2 are each alkyl of 1-10 C atoms or R 2 may also be alkoxy of 1-10 C atoms, and Cy is 1,4-cyclohexylene.
Claim 2
Dependent Claim
59 words
In a liquid-crystal dielectric useful for electrooptical display elements and comprising at least two liquid-crystal components, the improvement wherein at least one component is a bicyclohexyl of the formula R.sup.1 --Cy--Cy--R.sup.2 wherein R 1 and R 2 are each alkyl of 1-10 C atoms or R 2 may also be alkoxy of 1-10 C atoms, and Cy is 1,4-cyclohexylene.
Claim 3
Dependent Claim
11 words
A dielectric of claim 1, wherein and R 2 is alkoxy.
Claim 4
Dependent Claim
15 words
A dielectric of claim 1 wherein both of R 1 and R 2 are alkyl.
Claim 5
Dependent Claim
13 words
A dielectric of claim 10 wherein R 1 and R 2 are straight-chained.
Claim 6
Dependent Claim
17 words
A dielectric of claim 1 wherein R 1 and R 2 each contains C 3-8 C atoms.
Claim 7
Dependent Claim
10 words
A liquid-crystal composition of claim 1 comprising 2-15 liquid-crystal components.
Claim 8
Dependent Claim
19 words
In an electrooptical display element comprising a liquid dielectric, the improvement wherein the dielectric is one of claim 1.
References Cited (Backward Citations)
DE2636684A1
Cited
US4198130A
Cited
JPS5668636A
Cited
US4331552A
Cited
US4398803A
Cited
GB2078389A
Cited
GB2080561A
Cited
JPS5734176A
Cited
JPS5799542A
Cited
EP0058981A2
Cited
JPS57162773A
Cited
JPS58167535A
Cited
US4507222A
Cited
JPS58167671A
Cited
JPS5911387A
Cited
JPS5970624A
Cited
JPS6054333A
Cited
JPS6069049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |