US4620938A
Expired / Lapsed
US
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Hydroterphenyls
Assignee: Merck Patent GmbH
•
Filing: 1985-04-05
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Granted: 1986-11-04
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Expires: 2005-04-05
Abstract
Abstract New hydroterphenyls of formula I R.sup.1 --Cy--Cy--Ph--R.sup.2 I wherein R 1 is alkyl; R 2 is H, F, Cl, Br, I, OH, CN, alkyl, --O-alkyl, --COOR 3 or --O--CO--R 3 ; R 3 is H, alkyl, --Cy-alkyl, --Ph-alkyl, --Ph--O-alkyl, --Ph--CN or --Ph--F; Cy is 1,4-cyclohexylene; and Ph is 1,4-phenylene; can be used as dielectrics for electrooptical display elements.
Inventors
- 👤 Michael Romer
- 👤 Joachim Krause
- 👤 Rudolf Eidenschink
- 👤 Georg Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:50
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30; C07; C07C; C07C255/00; C07C13/00; C07C13/28; C07C25/00; C07C25/18; C07C39/00; C07C39/12; C07C39/17; C07C43/00; C07C43/02; C07C43/20; C07C43/21; C07C45/00; C07C45/45; C07C45/46; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A hydroterphenyl of the formula R.sup.1 --Cy--Cy--Ph--R.sup.2 wherein R 1 is alkyl; R 2 is --COOR 3 or --O--CO--R 3 ; R 3 is H, alkyl, --Cy-alkyl, --Ph-alkyl, --Ph--O-alkyl, --Ph--CN or --Ph--F; Cy is 1,4-cyclohexylene; Ph is 1,4-phenylene; and all alkyl groups each independently contain 1-10 C atoms.
Claim 2
Dependent Claim
48 words
A hydroterphenyl of the formula R.sup.1 --Cy--Cy--Ph--R.sup.2 wherein R 1 is alkyl; R 2 is --COOR 3 or --O--CO--R 3 ; R 3 is H, alkyl, --Cy-alkyl, --Ph-alkyl, --Ph--O-alkyl, --Ph--CN or --Ph--F; Cy is 1,4-cyclohexylene; Ph is 1,4-phenylene; and all alkyl groups each independently contain 1-10 C atoms.
Claim 3
Dependent Claim
12 words
A compound of claim 1 wherein R 2 is --COOR 3 .
Claim 4
Dependent Claim
12 words
A compound of claim 1 wherein R 2 is --O--CO--R 3 .
Claim 5
Dependent Claim
20 words
A compound of claim 1 wherein the substituents on each Cy group are in the trans-position relative to each other.
Claim 6
Dependent Claim
12 words
A compound of claim 1 wherein all alkyl groups are straight chained.
Claim 7
Dependent Claim
13 words
A compound of claim 5 wherein each alkyl group is of 2-6 C-atoms.
Claim 8
Dependent Claim
28 words
A liquid crystal dielectric useful in electrooptical display elements, comprising at least two liquid crystalline components, wherein at least one such component is a hydroterphenyl of claim 1.
Claim 9
Dependent Claim
10 words
A liquid crystal dielectric of claim 7 comprising 2-15 components.
Claim 10
Dependent Claim
20 words
A liquid crystal dielectric of claim 7 wherein the amount of said hydroterphenyl components is 0.1 to 60 wt. %.
Claim 11
Dependent Claim
25 words
In an electrooptical display element, based on an electrooptical cell comprising a liquid crystal dielectric, the improvement wherein the dielectric is that of claim 7.
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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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |