US4537698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystalline piperidine derivatives
Assignee: Merck Patent GmbH
•
Filing: 1983-05-31
•
Granted: 1985-08-27
•
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 08:43
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)
US3392171A
Cited
US3314952A
Cited
GB1311580A
Cited
US3960961A
Cited
EP0019665A1
Cited
US4349452A
Cited
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 |