US4077900A
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Liquid crystalline dielectric composition
Assignee: Merck Patent GmbH
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Filing: 1977-03-08
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Granted: 1978-03-07
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Expires: 1997-03-08
Abstract
Abstract A liquid crystalline dielectric composition contains 0.001-5% by weight of a monocyclic or bicyclic amino compound of the formula ##STR1## wherein R 1 and R 2 each are hydrogen or collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 ; X is --CH 2 or --CO--; Y is --Z--CH 2 --CH 2 -- or ##STR2## Z is O, S, or NH; m and n are 0, 1 or 2; p is 1, 2 OR 3; OR AN ACID ADDITION SALT OR METAL SALT CHELATE COMPLEX THEREOF.
Inventors
- 👤 Ludwig Pohl
- 👤 Rainer Klink
- 👤 Joachim Krause
- 👤 Rudolf Eidenschink
- 👤 Fernando Del Pino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:20
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/56
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
129 words
In a liquid crystalline dielectric composition comprising at least one liquid crystalline compound, the improvement wherein the composition, when disposed between the electrode surfaces of electro-optical indicator elements, is rendered capable of assuming a stable parallel orientation with the electrode surfaces by the presence therein of 0.001 to 5% by weight of an amino compound of the formula ##STR17## wherein R 1 and R 2 each are hydrogen or collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 ; X is --CH 2 -- or --CO--; Y is --Z--CH 2 --CH 2 -- or ##STR18## Z is O, S or NH; m and n are 0, 1 or 2 and p is 1, 2 or 3 or an acid-addition salt or a metal salt-chelate complex thereof.
Claim 2
Dependent Claim
129 words
In a liquid crystalline dielectric composition comprising at least one liquid crystalline compound, the improvement wherein the composition, when disposed between the electrode surfaces of electro-optical indicator elements, is rendered capable of assuming a stable parallel orientation with the electrode surfaces by the presence therein of 0.001 to 5% by weight of an amino compound of the formula ##STR17## wherein R 1 and R 2 each are hydrogen or collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 ; X is --CH 2 -- or --CO--; Y is --Z--CH 2 --CH 2 -- or ##STR18## Z is O, S or NH; m and n are 0, 1 or 2 and p is 1, 2 or 3 or an acid-addition salt or a metal salt-chelate complex thereof.
Claim 3
Dependent Claim
25 words
The dielectric of claim 1, containing 0.01 to 2% by weight of the amino compound or an acid-addition salt or a metal salt-chelate complex thereof.
Claim 4
Dependent Claim
14 words
The dielectric of claim 1, wherein R 1 and R 2 each are H.
Claim 5
Dependent Claim
24 words
The dielectric of claim 1, wherein R 1 and R 2 collectively are --CH 2 --(CH 2 --Z--Ch 2 ) p --CH 2 --.
Claim 6
Dependent Claim
39 words
The dielectric of claim 1, wherein R 1 and R 2 collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 p is 2, X, is --CH 2 --, and Y is --Z--CH 2 --CH 2 --.
Claim 7
Dependent Claim
21 words
The dielectric of claim 1, wherein R 1 and R 2 each are H, m is 1 and n is 1.
Claim 8
Independent Claim
82 words
A method for the production of liquid crystalline dielectrics capable of assuming stable parallel orientation to containing electrode surfaces of electro-optical indicator elements, comprising dissolving in a liquid crystalline compound from 0.001 to 5% by weight of an amino compound of the formula ##STR19## wherein R 1 and R 2 each are hydrogen or collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 ; X is --CH 2 -- or --CO--; Y is --Z--CH 2 --CH 2 or ##STR20##
Claim 9
Independent Claim
82 words
A method for the production of liquid crystalline dielectrics capable of assuming stable parallel orientation to containing electrode surfaces of electro-optical indicator elements, comprising dissolving in a liquid crystalline compound from 0.001 to 5% by weight of an amino compound of the formula ##STR19## wherein R 1 and R 2 each are hydrogen or collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 ; X is --CH 2 -- or --CO--; Y is --Z--CH 2 --CH 2 or ##STR20##
Claim 10
Dependent Claim
30 words
Z is O, S or NH; m and n are 0, 1 or 2 and p is 1. 2, or 3, or an acid-addition salt or metal salt-chelate complex thereof.
Claim 11
Dependent Claim
30 words
Z is O, S or NH; m and n are 0, 1 or 2 and p is 1. 2, or 3, or an acid-addition salt or metal salt-chelate complex thereof.
Claim 12
Dependent Claim
24 words
The method of claim 7, wherein R 1 and R 2 collectively are CH 2 --(CH 2 --Z--CH 2 ) p --CH 2 --.
Claim 13
Dependent Claim
14 words
The method of claim 7, wherein R 1 and R 2 each are H.
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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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |