US4341653A
Expired / Lapsed
US
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Liquid-crystalline 4-alkylcyclohexyl esters
Assignee: JNC Corp
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Filing: 1981-02-26
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Granted: 1982-07-27
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Expires: 2001-02-26
Abstract
Abstract Novel liquid crystal compounds having broader and preferable liquid crystal temperature ranges are provided. Their optically active isomers form a cholesteric liquid crystal, while their racemates form a nematic liquid crystal. The compounds are trans-4"-alkylcyclohexyl esters of 4'-(2-methyl-butyl)-4-biphenylcarboxylic acid expressed by the general formula ##STR1## wherein R represents a straight chain alkyl group having 1 to 10 carbon atoms, and the symbol * represents an asymmetric carbon atom.
Inventors
- 👤 Takashi Inukai
- 👤 Kenji Furukawa
- 👤 Shigeru Sugimori
- 👤 Hideo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:40
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K19/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
Trans-4"-alkylcyclohexyl esters of 4'-(2-methyl-butyl)-4-biphenylcarboxylic acid expressed by the general formula ##STR9## wherein R represents a straight chain alkyl group having 1 to 10 carbon atoms, and the symbol * represents an asymmetric carbon atom.
Claim 2
Dependent Claim
34 words
Trans-4"-alkylcyclohexyl esters of 4'-(2-methyl-butyl)-4-biphenylcarboxylic acid expressed by the general formula ##STR9## wherein R represents a straight chain alkyl group having 1 to 10 carbon atoms, and the symbol * represents an asymmetric carbon atom.
Claim 3
Dependent Claim
32 words
Compounds according to claim 1 which are optically active substances based on the asymmetric carbon atom having a symbol * attached in said formula (I) and exhibit a cholesteric liquid crystal phase.
Claim 4
Dependent Claim
29 words
Compounds according to claim 1 which are racemic substances based on the asymmetric carbon atom having a symbol * attached in said formula (I) and exhibit a nematic phase.
Claim 5
Dependent Claim
23 words
Liquid crystal compositions for display elements, obtained by adding compound(s) of said formula (I) of claim 1 to other nematic liquid crystal substances.
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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) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |