US4913838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal compound with a 4-(optically active alkyl)-3-cyanophenyl group
Assignee: JNC Corp
•
Filing: 1988-03-18
•
Granted: 1990-04-03
•
Expires: 2008-03-18
Abstract
Abstract An optically active liquid crystal compound having specific features suitable to a display mode utilizing ferroelectric chiral smectic phases and particularly having a large spontaneous polarization value, and a chiral liquid crystal composition containing the compound are provided, which compound is expressed by the formula ##STR1## wherein R 1 represents an alkyl group of 2 to 18 carbon atoms; R 2 represents an alkyl group or alkoxy group each of 1 to 20 carbon atoms, hydrogen atom, a halogen atom or cyano group; A represents --COO-- or --OCO--; B and C each represent a single bond, ##STR2## wherein X represents hydrogen atom, a halogen atom or cyano group; and l, m and n each represent 0 or 1.
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 22:26
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/22; C09K19/20; C09K19/2007; C09K19/2021; C09K19/12; C09K19/126; C09K19/30; C09K19/3001; C09K19/3003; C09K19/34; C09K19/3441; C09K19/3444; C09K19/345; C09K19/3455; C09K19/3458; C09K19/3463
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
44 words
An optically active liquid crystal compound expressed by the formula ##STR63## wherein R 2 represents an alkyl group or alkoxy group each of 1 to 20 carbon atoms, B represents ##STR64## C represents B or a single bond, and m represents 0 or 1.
Claim 2
Dependent Claim
44 words
An optically active liquid crystal compound expressed by the formula ##STR63## wherein R 2 represents an alkyl group or alkoxy group each of 1 to 20 carbon atoms, B represents ##STR64## C represents B or a single bond, and m represents 0 or 1.
Claim 3
Dependent Claim
14 words
An optically active liquid crystal compound according to claim 1, wherein m represents 0.
Claim 4
Dependent Claim
18 words
An optically active liquid crystal compound according to claim 2, wherein each of B and C represents ##STR65##
Claim 5
Dependent Claim
23 words
An optically active liquid crystal compound according to claim 3, wherein R 2 represents an alkoxy group of 1 to 20 carbon atoms.
Claim 6
Dependent Claim
14 words
An optically active liquid crystal compound according to claim 2, wherein B--C represents ##STR66##
Claim 7
Dependent Claim
14 words
An optically active liquid crystal compound according to claim 2, wherein B--C represents ##STR67##
Claim 8
Dependent Claim
14 words
An optically active liquid crystal compound according to claim 2, wherein B--C represents ##STR68##
Claim 9
Dependent Claim
14 words
An optically active liquid crystal compound according to claim 2, wherein B--C represents ##STR69##
Claim 10
Dependent Claim
14 words
An optically active liquid crystal compound according to claim 1, wherein m represents 1.
Claim 11
Dependent Claim
20 words
An optically active liquid crystal compound according to claim 9, wherein B represents ##STR70## and C represents a single bond.
Claim 12
Dependent Claim
27 words
A liquid crystal composition comprising at least two components at least one of which is an optically active liquid crystal compound as set forth in claim 1.
Claim 13
Dependent Claim
14 words
A liquid crystal composition according to claim 11, exhibiting a chiral smectic C phase.
Claim 14
Dependent Claim
13 words
A liquid crystal composition according to claim 11, exhibiting a chiral nematic phase.
References Cited (Backward Citations)
US4235736A
Cited
US4341653A
Cited
EP0084194A1
Cited
US4478740A
Cited
US4622165A
Cited
US4737313A
Cited
WO1986000067A1
Cited
US4828754A
Cited
US4769176A
Cited
US4728458A
Cited
US4776973A
Cited
US4780242A
Cited
JPS61246168A
Cited
DE3515373A1
Cited
WO1986007055A1
Cited
US4820839A
Cited
JPS6222889A
Cited
DE3600052A1
Cited
US4765924A
Cited
WO1987005013A2
Cited
US4818432A
Cited
JPS6348254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |