US4528116A
Expired / Lapsed
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Liquid crystalline cyclohexylbenzene derivatives their preparation and the liquid compositions containing same
Assignee: Military University of Technology in Warsaw
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Filing: 1984-03-29
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Granted: 1985-07-09
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Expires: 2004-03-29
Abstract
Abstract Novel 4-/trans-4'-n-alkylcyclohexyl/-1-isothiocyanatobenzenes expressed by the general formula <IMAGE> /I/ where n is an integer number from 1 to 12, method of their preparation and liquid crystal composition containing these novel compounds revealing a wide nematic phase range and low viscosity.
Inventors
- 👤 Roman Dabrowski
- 👤 Jerzy Dziaduszek
- 👤 Tomasz Szczucinski
- 👤 Zofia Stolarz
- 👤 Jerzy Zielinski
- 👤 Krystyna Kenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:24
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3003; C07; C07C; C07C331/00; C07C331/16; C07C331/28; C07C2601/00; C07C2601/12; C07C2601/14; C09K2019/0444
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
4-/trans-4'-n-alkylcyclohexyl/-1-isothiocyanatobenzenes expressed by the general formula: ##STR4## where n is an integer number from 1 to 12.
Claim 2
Dependent Claim
17 words
4-/trans-4'-n-alkylcyclohexyl/-1-isothiocyanatobenzenes expressed by the general formula: ##STR4## where n is an integer number from 1 to 12.
Claim 3
Dependent Claim
12 words
4-/trans-4'-n-alkylcyclohexyl/-1-isothiocyanatobenzenes as claimed in claim 1 where n is 3 to 7.
Claim 4
Dependent Claim
17 words
Liquid crystal mixture including at least one component expressed by formula /I/ as claimed in claim 1.
Claim 5
Dependent Claim
14 words
Liquid crystal mixture as claimed in claim 3 wherein are included 4-/trans-4'-n-propylcyclohexyl/-1-isothiocyanatobenzene and/or 4-/trans-4'-n-hexylcyclohexyl/-1-isothiocyanatobenzene.
Claim 6
Dependent Claim
47 words
Liquid crystal mixture as claimed in claim 3 including a liquid crystal compound selected from the group consisting of 4-alkyl-4'-cyanobiphenyls 4-alkoxy-4'-cyanobiphenyls and/or esters of 4-alkylbenzoic acids and/or esters of 4-alkoxybenzoic acids, esters of 4-alkylcycloalkanecarboxylic acids, 4-/alkylcyclohexyl/-cyanobenzenes and/or Schiff bases, and 2,5-disubstituted 1,3-dioxane derivatives and/or optically active compounds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |