US4828754A
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Novel liquid crystalline compounds having substituents
Assignee: DIC Corp
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Filing: 1988-02-23
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Granted: 1989-05-09
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Expires: 2008-02-23
Abstract
Abstract A liquid crystalline compound represented by formula <IMAGE> (I) wherein R denotes an alkyl or alkoxy group having 1 to 20 carbon atoms, m and n are each 0 or 1, provided m and n are not 1 at the same time. <IMAGE> <IMAGE> X and Y each denote a hydrogen atom, a halogen atom or a nitro group, provided X and Y are not hydrogen atoms at the same time, and Q* denotes an optically active group having an asymmetric carbon atom and a linear or cyclic alkyl or alkenyl group which may be substituted by a halogen atom, or the like.
Inventors
- 👤 Sadao Takehara
- 👤 Toru Fujisawa
- 👤 Yoshi Arai
- 👤 Jitsuo Kurokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
A liquid crystalline compound of formula (I) ##STR92## wherein R denotes an alkyl or alkoxy group having 6 to 18 carbon atoms, ##STR93## m is 1, n is 0, ##STR94## Y denotes fluorine or chlorine, and Q* denotes an optically active allkyl group having an asymmetric carbon atom including ##STR95## wherein l is an integer of 1-3, R' denotes an alkyl group having 2 to 8 carbon atoms, and C* denotes an asymmetrical carbon atom.
Claim 2
Dependent Claim
75 words
A liquid crystalline compound of formula (I) ##STR92## wherein R denotes an alkyl or alkoxy group having 6 to 18 carbon atoms, ##STR93## m is 1, n is 0, ##STR94## Y denotes fluorine or chlorine, and Q* denotes an optically active allkyl group having an asymmetric carbon atom including ##STR95## wherein l is an integer of 1-3, R' denotes an alkyl group having 2 to 8 carbon atoms, and C* denotes an asymmetrical carbon atom.
Claim 3
Dependent Claim
22 words
The liquid crystalline compound of claim 1 wherein in formula (I) R is an alkoxy group having 6 to 18 carbon atoms.
Claim 4
Dependent Claim
14 words
The liquid crystalline compound of claim 2 wherein in formula (I) Y is fluorine.
Claim 5
Dependent Claim
22 words
The liquid crystalline compound of claim 3 wherein in formula (I) Q* is an optically active 2-methylbutyl, 3-methylphenyl, 1-methylpropyl or 1-methylheptyl group.
Claim 6
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of formula (I) as set forth in claim 1 and at least one other liquid crystalline compound.
Claim 7
Dependent Claim
13 words
The liquid crystalline composition of claim 5 having a chiral smectic C phase.
Claim 8
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of formula (I) as set forth in claim 2 and at least one other liquid crystalline compound.
Claim 9
Dependent Claim
12 words
The liquid crystalline composition of claim 7 having chiral smectic C phase.
Claim 10
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of formula (I) as set forth in claim 3 and at least one other liquid crystalline compound.
Claim 11
Dependent Claim
13 words
The liquid crystalline composition of claim 9 having a chiral smectic C phase.
Claim 12
Dependent Claim
31 words
A liquid crystalline composition comprising a mixture of at least one of the compounds of formula (I) as set forth in claim 4 and at least one other liquid crystalline compound.
Claim 13
Dependent Claim
13 words
The liquid crystalline composition of claim 11 having a chiral smectic C phase.
Claim 14
Dependent Claim
19 words
The liquid crystalline composition of claim 5 wherein said at least one other liquid crystalline compound comprises ((S)-2-methylbutyl p-decyloxycarbonylbenzylideneaminocinnamate).
Claim 15
Dependent Claim
23 words
A liquid crystalline composition comprising a mixture of at least two of the compounds of formula (I) as set forth in claim 1.
Claim 16
Dependent Claim
13 words
The liquid crystalline composition of claim 14 having a chiral smectic C phase.
Claim 17
Dependent Claim
29 words
The liquid crystalline composition of claim 15 wherein in at least one of the compounds of formula (I) R is an alkoxy group having 6 to 18 carbon atoms.
Claim 18
Dependent Claim
21 words
The liquid crystalline composition of claim 15 wherein in at least one of the compounds of formula (I) Y is fluorine.
Claim 19
Dependent Claim
29 words
The liquid crystalline composition of claim 15 wherein in at least one of the compounds of formula (I) Q* is an optically active 2-methylbutyl, 3-methylpentyl, 1-methylpropyl or 1-methylheptyl group.
Claim 20
Dependent Claim
24 words
The liquid crystalline composition of claim 9 having a chiral smectic C phase near room temperature comprising a mixture of 3-fluoro-4--(S)-2-methylbutyloxycarbonyl]phenyl 4'-octyloxybiphenyl-4-carboxylate and 3-fluoro-4--(S)-2-methylbutyloxycarbonyl]phenyl-4-octyloxybenzoate.
Claim 21
Dependent Claim
33 words
The liquid crystalline composition of claim 14 having a chiral smectic C phase near room temperature comprising a mixture of 3-fluoro-4--(S)-2-methylbutyloxycarbonyl]phenyl 4'-decyloxybiphenyl-4-carboxylate, 3-chloro-4--(S)-2-methylbutyloxycarbonyl]phenyl 4'-octyloxybiphenyl-4-carboxylate, 4--(S)-2-methylbutyloxycarbonyl]phenyl 3'-chloro-4'-octyloxybiphenyl-4-carboxylate, 4{4--(S)-2-methylbutyloxycarbonyl]phenyl}phenyl 3-fluoro-4-decyloxybenzoate, 4-{4--(S)-2-methylbutyloxycarbonyl]phenyl} 3-chloro-4-decyloxybenzoate, and 4-{4--(S)-2-methylbutyloxycarbonyl]phenyl}phenyl 2-fluoro-4-decyloxybenzoate.
Claim 22
Dependent Claim
43 words
In a liquid crystal display cell having a thin film of a liquid crystalline composition sandwiched between two transparent electrodes the improvement wherein the liquid crystalline composition comprises at least one liquid crystalline compound of formula (I) as set forth in claim 1.
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |