US4537698A
Expired / Lapsed
US
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Liquid crystalline piperidine derivatives
Assignee: Merck Patent GmbH
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Filing: 1983-05-31
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Granted: 1985-08-27
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Expires: 2003-05-31
Abstract
Abstract New piperidine derivatives ##STR1## in which R 1 and R 2 each independently is alkyl or alkoxy each of 1 to 10 C atoms, --Y--Z, F, Cl, Br or CN, and the radical R 1 can also be H, Y is --CO--O--, --O--CO or a single bond, Z is --Q--R 3 or alkyl having 1-10 C atoms, Q is 1,4-phenylene or 1,4-cyclohexylene, R 3 is alkyl having 1-10 C atoms, F or CN, and A is 1,4-cyclohexylene or 1,3-dioxane-2,5-diyl, and their acid addition salts, can be used as components of dielectrics for electro-optical display elements.
Inventors
- 👤 Wolfgang Sucrow
- 👤 Wolfgang Schatull
- 👤 Peter Fuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:20
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/155; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/10; C07D211/14; C07D211/18; C07D211/34; C07D211/36; C07D211/38; C07D211/40; C07D211/44; C07D211/46; C07D211/48; C07D211/50; C07D211/60; C07D211/62; C07D405/00; C07D405/02; C07D405/04; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/3483
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
55 words
A liquid crystalline dielectric material useful in electro-optical display elements and comprising at least two liquid crystalline components, wherein at least one component is a piperidine derivative of the formula ##STR4## wherein R 2 is alkyl or alkoxy each of 1 to 10 carbon atoms, F, CL or Br or an acid addition salt thereof.
Claim 2
Dependent Claim
55 words
A liquid crystalline dielectric material useful in electro-optical display elements and comprising at least two liquid crystalline components, wherein at least one component is a piperidine derivative of the formula ##STR4## wherein R 2 is alkyl or alkoxy each of 1 to 10 carbon atoms, F, CL or Br or an acid addition salt thereof.
Claim 3
Dependent Claim
17 words
A dielectric of claim 1 containing 1,4-cyclohexylene groups having substituents in the trans-position relative to each other.
Claim 4
Dependent Claim
15 words
A dielectric of claim 1 containing alkyl or alkoxy groups all of which are straight-chained.
Claim 5
Dependent Claim
16 words
A dielectric of claim 1 wherein the alkyl and alkoxy groups are of 2-6 C atoms.
Claim 6
Dependent Claim
15 words
A dielectric of claim 1 wherein R 2 is straight-chain alkyl of 2-6 C atoms.
Claim 7
Dependent Claim
10 words
A dielectric of claim 1 wherein R 2 is alkyl.
Claim 8
Dependent Claim
10 words
A dielectric of claim 1 comprising 2-15 liquid crystalline components.
Claim 9
Dependent Claim
13 words
A dielectric of claim 1 comprising 0.1-60 wt % of said piperidine component.
Claim 10
Dependent Claim
13 words
A dielectric of claim 1 comprising 5-40 wt % of said piperidine component.
Claim 11
Dependent Claim
20 words
In an electro-optical display element, comprising a liquid crystalline dielectric, the improvement wherein the dielectric is that of claim 1.
References Cited (Backward Citations)
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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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |