US4834905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring compounds
Assignee: UK Secretary of State for Defence
•
Filing: 1986-10-03
•
Granted: 1989-05-30
•
Expires: 2006-10-03
Abstract
Abstract Compounds of the formula R.sup.1 --Q.sup.1 --(CH.sub.2).sub.m --(COO).sub.n --(CH.sub.2).sub.p --Q 2 --R 2 wherein R 1 and R 2 are each independently alkyl or alkoxy each of 1-12 C atoms, F, Cl, Br, CN or --Q 3 --R 3 , or one of R 1 and R 2 can also be H; Q 1 , Q 2 and Q 3 are each independently 1,4-phenylene, 1,4-cyclohexylene, 1,4-bicyclo(2,2,2)-octylene or 1,3-dioxane-2,5-diyl, each of which is unsubstituted or substituted by 1-4 fluorine, chlorine or bromine atoms; R 3 is alkyl or alkoxy each of 1-8 C atoms, H, F, Cl, Br or CN; m is 1, 2, 3, 4, 5 or 6; n is 0 or 1; and p is 0, 1, 2, 3, 4 or 5; the sum of (m+p) being 2, 4 or 6 and the sum of (m+n+p) being at least 3; but with the proviso that Q 3 is unsubstituted 1,4-phenylene or 1,4-phenylene substituted by a fluorine, chlorine or bromine atom, only when n=1 or (m+p)=6 or at least one of R 1 to R 3 is F, Cl or Br or none of R 1 to R 3 is CN or two of the radicals R 1 to R 3 are CN, are valuable liquid crystalline components.
Inventors
- 👤 Rudolf Eidenschink
- 👤 Joachim Krause
- 👤 Beatrice M. Andrews
- 👤 George W. Gray
- 👤 Neil Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
C; C07; C07C; C07C255/00; C07C13/00; C07C13/28; C07C25/00; C07C25/18; C07C43/00; C07C43/02; C07C43/20; C07C43/205; C07C5/00; C07C5/02; C07C5/03; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/30; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2014; C09K19/30; C09K19/3001; C09K19/32; C09K19/321; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
146 words
A ring compound of the formula R.sup.1 --Q.sup.1 --(CH.sub.2).sub.m --(COO).sub.n --(CH.sub.2).sub.p --Q.sup.2 --R.sup.2 wherein R 1 and R 2 are each independently alkyl or alkoxy each of 1-12 C atoms, F, Cl, Br, CN, or --Q 3 --R 3 , or one of R 1 and R 2 can also be H, and at least one or R 1 and R 2 is --Q 3 --R 3 ; Q 1 , Q 2 and Q 3 are each independently 1,4-phenylene (Phe), 1,4-cyclohexylene (Cy), 1,4-bicyclo(2,2,2)-octylene (Bi) or 1,3-dioxane-2,5-diyl (Dio), each of which is unsubstituted or substituted by 1-4 fluorine, chlorine or bromine atoms; R 3 is alkyl or alkoxy each of 1-8 C atoms, H, F, Cl, Br or CN; m is 2; n is 1; and p is 0, 2, or 4; but with the proviso that R 1 --Q 1 is not alkyl-Cy when p=0.
Claim 2
Dependent Claim
146 words
A ring compound of the formula R.sup.1 --Q.sup.1 --(CH.sub.2).sub.m --(COO).sub.n --(CH.sub.2).sub.p --Q.sup.2 --R.sup.2 wherein R 1 and R 2 are each independently alkyl or alkoxy each of 1-12 C atoms, F, Cl, Br, CN, or --Q 3 --R 3 , or one of R 1 and R 2 can also be H, and at least one or R 1 and R 2 is --Q 3 --R 3 ; Q 1 , Q 2 and Q 3 are each independently 1,4-phenylene (Phe), 1,4-cyclohexylene (Cy), 1,4-bicyclo(2,2,2)-octylene (Bi) or 1,3-dioxane-2,5-diyl (Dio), each of which is unsubstituted or substituted by 1-4 fluorine, chlorine or bromine atoms; R 3 is alkyl or alkoxy each of 1-8 C atoms, H, F, Cl, Br or CN; m is 2; n is 1; and p is 0, 2, or 4; but with the proviso that R 1 --Q 1 is not alkyl-Cy when p=0.
Claim 3
Dependent Claim
45 words
A compound of claim 1 of the formula R 3 --Phe--Phe--Z--Phe--R 2 R 3 --Cy--Phe--Z--Phe--R 2 R 1 --Phe--Z--Phe--Cy--R 3 R 3 --Cy--Phe--Z--Cy--R 2 wherein Phe is 1,4-phenylene, Cy is 1,4-cyclohexylene and Z is --(CH 2 ) m --(COO) n --(CH 2 ) p --.
Claim 4
Dependent Claim
56 words
A compound of claim 1 of the formula R 3 --Phe--Phe--Z--Phe--Phe--R 3 R 3 --Cy--Phe--Z--Phe--Cy--R 3 R 3 --Dio--Phe--Z--Phe--Dio--R 3 R 3 --Phe--Cy--Z--Cy--Phe--R 3 R 3 --Cy--Cy--Z--Cy--Cy--R 3 R 3 --Dio--Cy--Z--Cy--Dio--R 3 wherein "Phe" is 1,4-phenylene, "Cy" is 1,4-cyclohexylene, "Dio" is 1,3-dioxane-2,5-diyl and Z is --(CH 2 ) m --(COO) n (CH 2 ) p --.
Claim 5
Dependent Claim
14 words
A compound of claim 1 wherein all alkyl and alkoxy groups are straight chained.
Claim 6
Dependent Claim
17 words
A compound of claim 1 wherein R 1 or R 2 is independently alkyl, alkoxy or CN.
Claim 7
Dependent Claim
28 words
A liquid-crystal dielectric useful for electro-optical display elements and comprising at least two liquid-crystal components, wherein at least one of the components is a compound of claim 1.
Claim 8
Dependent Claim
10 words
A dielectric of claim 6 comprising 2-15 liquid crystal components.
Claim 9
Dependent Claim
20 words
In an electro-optical display element comprising a liquid crystal dielectric, the improvement wherein the dielectric is that of claim 6.
Claim 10
Dependent Claim
13 words
A compound of claim 1 of the formula R.sup.1 --Q.sup.1 --(CH.sub.2).sub.2 --COO--Q.sup.2 --R.sup.2.
Claim 11
Dependent Claim
28 words
A liquid-crystal dielectric useful for electro-optical display elements and comprising at least two liquid-crystal components, wherein at least one of the components is a compound of claim 9.
Claim 12
Dependent Claim
20 words
In an electro-optical display element comprising a liquid crystal dielectric, the improvement wherein the dielectric is that of claim 10.
Claim 13
Dependent Claim
16 words
A dielectric of claim 10, wherein all Q groups are 1,4-cyclohexylene or 1,4-phenylene, unsubstituted or substituted.
Claim 14
Dependent Claim
30 words
A dielectric of claim 12, wherein one of Q 1 and Q 2 is 1,4-phenylene and, respectively, one of R 2 and R 1 is --Q 3 --R 3 .
Claim 15
Dependent Claim
23 words
A dielectric of claim 13, wherein Q 2 and Q 3 , or Q 1 and Q 3 , respectively, are both 1,4-cyclohexylene.
References Cited (Backward Citations)
US3787512A
Cited
DE2658610A1
Cited
EP0023730A1
Cited
DD155078A1
Cited
DD155063A1
Cited
US4627933A
Cited
JPS60181059A
Cited
JPS60197637A
Cited
JPS60204743A
Cited
JPS60215652A
Cited
US4617142A
Cited
JPS60237048A
Cited
JPS60246347A
Cited
JPS615054A
Cited
US4744918A
Cited
WO1987005291A2
Cited
JPH06219561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |