Patent EP0169431A1 successfully refreshed from Google Patents.
US4886622A
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US
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Optically active liquid crystal compound having cyano group
Assignee: JNC Corp
•
Filing: 1987-08-18
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Granted: 1989-12-12
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Expires: 2007-08-18
Abstract
Abstract An optically liquid crystalline compound having an extremely large spontaneous polarization value and a chiral smectic liquid crystal composition containing the compound are provided, the compound being expressed by the formula ##STR1## wherein m represents an integer of 2 to 18; l represents an integer of 0 to 12; n represents 0 or 1; R represents an alkyl group or an alkoxy group each of 2 to 20 carbon atoms, a halogen atom or cyano group; and A and B each represent a single bond, ##STR2## wherein X represents hydrogen atom, a halogen atom or cyano group, and a chiral smectic liquid crystal composition containing at least one kind of the above compound.
Inventors
- 👤 Kazutoshi Miyazawa
- 👤 Takashi Inukai
- 👤 Hiromichi Inoue
- 👤 Shinichi Saito
- 👤 Kouji Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:31
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07C; C07C255/00; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/30; C09K19/3001; C09K19/3066; C09K19/3068; C09K19/34; C09K19/3441; C09K19/3444; C09K19/345; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
An optically active liquid crystalline compound expressed by the formula ##STR115## wherein m represents an integer of 2 to 18; l represents an integer of 0 to 12; n represents 0 to 1; R represents an alkyl group or an alkoxy group each of 2 to 20 carbon atoms, a halogen atom or a cyano group; A represents a single bond, ##STR116## and B represents ##STR117## wherein X represents a hydrogen atom, a halogen atom or a cyano group.
Claim 2
Dependent Claim
79 words
An optically active liquid crystalline compound expressed by the formula ##STR115## wherein m represents an integer of 2 to 18; l represents an integer of 0 to 12; n represents 0 to 1; R represents an alkyl group or an alkoxy group each of 2 to 20 carbon atoms, a halogen atom or a cyano group; A represents a single bond, ##STR116## and B represents ##STR117## wherein X represents a hydrogen atom, a halogen atom or a cyano group.
Claim 3
Dependent Claim
19 words
An optically active liquid crystal compound according to claim 1 wherein said l in the formula (I) represents zero.
Claim 4
Dependent Claim
21 words
An optically active liquid crystal compound according to claim 1 wherein said l in the formula (I) represents 1 to 7.
Claim 5
Dependent Claim
24 words
An optically active liquid crystal compound according to claim 1 wherein said m in the formula (I) represents an integer of 2 to 6.
Claim 6
Dependent Claim
29 words
A chiral smectic liquid crystal composition comprising at least two components at least one of which is an optically active liquid crystalline compound as set forth in claim 1.
Claim 7
Dependent Claim
17 words
A light switching element comprising a chiral smectic liquid crystal composition as set forth in claim 5.
Claim 8
Dependent Claim
24 words
An optically active liquid crystalline compound according to claim 1 wherein n represents 1, R represents the alkyl group or alkoxy group, --A--B--represents ##STR118##
Claim 9
Dependent Claim
13 words
An optically active liquid crystalline compound according to claim 7 wherein --A--B--represents ##STR119##
Claim 10
Dependent Claim
13 words
An optically active liquid crystalline compound according to claim 7 wherein --A--B--represents ##STR120##
Claim 11
Dependent Claim
24 words
An optically active liquid crystalline compound according to claim 1 wherein n represents 0, R represents the alkyl group or alkoxy group, --A--B--represents ##STR121##
Claim 12
Dependent Claim
13 words
An optically active liquid crystalline compound according to claim 10 wherein --A--B--represents ##STR122##
Claim 13
Dependent Claim
13 words
An optically active liquid crystalline compound according to claim 10 wherein --A--B--represents ##STR123##
Claim 14
Dependent Claim
19 words
An optically active liquid crystalline compound according to claim 7 wherein R represents the alkoxy group and --A--B--represents ##STR124##
References Cited (Backward Citations)
US4110243A
Cited
US4149413A
Cited
US4225736A
Cited
US4287085A
Cited
US4341652A
Cited
US4311610A
Cited
US4622165A
Cited
US4737313A
Cited
EP0156726A1
Cited
WO1986000067A1
Cited
DE3525015A1
Cited
JPS61122250A
Cited
US4689176A
Cited
EP0188222A2
Cited
US4828754A
Cited
US4728458A
Cited
US4780242A
Cited
DE3515373A1
Cited
DE3518734A1
Cited
WO1986007055A1
Cited
US4820839A
Cited
EP0211646A2
Cited
WO1987001717A2
Cited
WO1987005013A2
Cited
DE3706766A1
Cited
US4818432A
Cited
JPS63130574A
Cited
JPH0678972A
Cited
JPH06222889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |