US4724097A
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Bicyclohexylethanes
Assignee: Merck Patent GmbH
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Filing: 1986-05-21
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Granted: 1988-02-09
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Expires: 2006-05-21
Abstract
Abstract New bicyclohexylethanes of formula I R1--Cy--Cy--CH2CH2--A--(Cy)n--R2 (I) wherein R1 is alkyl; R2 is alkyl, in which one or two non-adjacent CH 2 groups can be replaced by 0 atoms, or is F, Cl, Br, CN, --COOalkyl or --O--CO--alkyl; or one of the radicals R 1 and R 2 can also be H; A is Cy, or 1,4-phenylene which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH 3 groups or by a CN group; Cy is 1,4-cyclohexylene and n is 0 or 1; the alkyl groups in each case containing 1-10 C atoms, with the proviso that n is 1 if A is Cy and R2 is CN, can be used as constituents of dielectrics for electrooptical display elements.
Inventors
- 👤 Michael Romer
- 👤 Rudolf Fidenschink
- 👤 Joachim Krause
- 👤 Bernhard Scheuble
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
C; C07; C07C; C07C255/00; C07C13/00; C07C13/28; C07C25/00; C07C25/18; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/164; C07C43/168; C07C43/20; C07C43/21; C07C43/30; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3028
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
54 words
A bicyclohexylethane of the formula R.sup.1 --Cy--Cy--CH.sub.2 CH.sub.2 --A--R.sup.2 wherein R 1 is alkyl; R 2 is F, Cl, Br or CN; A is 1,4-phenylene (Phe), or 1,4-phenylene substituted by one or two of F, Cl or CH 3 , or by CN; and Cy is 1,4-cyclohexylene; the alkyl group containing 1-10 C atoms.
Claim 2
Dependent Claim
54 words
A bicyclohexylethane of the formula R.sup.1 --Cy--Cy--CH.sub.2 CH.sub.2 --A--R.sup.2 wherein R 1 is alkyl; R 2 is F, Cl, Br or CN; A is 1,4-phenylene (Phe), or 1,4-phenylene substituted by one or two of F, Cl or CH 3 , or by CN; and Cy is 1,4-cyclohexylene; the alkyl group containing 1-10 C atoms.
Claim 3
Dependent Claim
12 words
A compound of claim 1 of the formula R.sup.2 --Cy--Cy--CH.sub.2 CH.sub.2 --Phe--R.sup.2.
Claim 4
Dependent Claim
13 words
A compound of claim 1, wherein A is 1,4-phenylene substituted by one F.
Claim 5
Dependent Claim
12 words
A compound of claim 1, wherein the alkyl group is straight chained.
Claim 6
Dependent Claim
10 words
A compound of claim 1, wherein R 2 is CN.
Claim 7
Dependent Claim
21 words
A liquid crystal dielectric comprising at least two liquid crystalline components wherein at least one is a bicyclohexylethane of claim 1.
Claim 8
Dependent Claim
8 words
A dielectric of claim 6 comprising 2-15 components.
Claim 9
Dependent Claim
15 words
A dielectric of claim 6, wherein the amount of said bicyclohexylethane is 1-60 wt %.
Claim 10
Dependent Claim
20 words
In an electrooptical display element, comprising a liquid crystalline dielectric, the improvement wherein the dielectric is that of claim 6.
Claim 11
Dependent Claim
24 words
A compound of claim 1 wherein A is Phe substituted by one or two of F, Cl, or CH 3 , or by CN.
Claim 12
Dependent Claim
17 words
A compound of claim 1 wherein R 1 is butyl, pentyl, hexyl, heptyl, octyl, nonyl or decyl.
Claim 13
Dependent Claim
13 words
A compound of claim 1 wherein R 2 is F, Cl, or Br.
Claim 14
Dependent Claim
36 words
A compound of claim 10 wherein A is Phe substituted by one or two F atoms, or by one or two Cl atoms or by one or two CH 3 groups or by one CN group.
Claim 15
Dependent Claim
23 words
A compound of claim 10 wherein A is Phe substituted by one or two F atoms or by one or two Cl atoms.
Claim 16
Dependent Claim
19 words
A compound of claim 10 wherein A is Phe substituted by one of F, Cl, or CH 3 .
Claim 17
Dependent Claim
12 words
A compound of claim 10 wherein A is Phe substituted by F.
Claim 18
Dependent Claim
12 words
A compound of claim 16 wherein R 2 is Cl or CN.
Claim 19
Dependent Claim
19 words
A compound of claim 10 wherein A is Phe substituted by one of F, Cl, CH 3 or CN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |