US4729847A
Expired / Lapsed
US
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Optically active liquid crystal compound having methyleneoxy group and composition containing same
Assignee: JNC Corp
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Filing: 1986-07-10
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Granted: 1988-03-08
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Expires: 2006-07-10
Abstract
Abstract A novel, superior, optically active liquid crystal compound exhibiting a smectic C* phase, and a liquid crystal composition containing the same are provided, which compound is expressed by the formula ##STR1## wherein X represents --CH 2 O-- or --OCH 2 --; Y represents --COO-- or --OCO--; and either one of R 1 or R 2 represents an optically active alkyl group, alkoxy group or alkoxycarbonyl group and the other represents a non-optically-active alkyl group or alkoxy group each of 4 to 18 carbon atoms.
Inventors
- 👤 Kazutoshi Miyazawa
- 👤 Hiromichi Inoue
- 👤 Takashi Inukai
- 👤 Kanetsugu Terashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:22
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C09K19/2028
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
An optically active liquid crystal compound expressed by the formula ##STR33## wherein Y represents --COO-- or --OCO--; and either one of R 1 or R 2 represents an optically active 1-methylheptyloxy group, 1-methylheptyloxycarbonyl group or 2-methylbutyloxy group, and the other represents a non-optically active alkyl group or alkoxy group each of 5 to 12 carbon atoms.
Claim 2
Dependent Claim
56 words
An optically active liquid crystal compound expressed by the formula ##STR33## wherein Y represents --COO-- or --OCO--; and either one of R 1 or R 2 represents an optically active 1-methylheptyloxy group, 1-methylheptyloxycarbonyl group or 2-methylbutyloxy group, and the other represents a non-optically active alkyl group or alkoxy group each of 5 to 12 carbon atoms.
Claim 3
Dependent Claim
21 words
An optically active liquid crystal compound according to claim 1 wherein said optically active group is the optically active 1-methylheptyloxy group.
Claim 4
Dependent Claim
21 words
An optically active liquid crystal compound according to claim 1 wherein said optically active group is the optically active 1-methylheptyloxycarbonyl group.
Claim 5
Dependent Claim
19 words
An optically active liquid crystal compound according to claim 1 wherein said optically active group is the 2-methylbutyloxy group.
Claim 6
Dependent Claim
34 words
A liquid crystal composition having at least two components at least one of which is an optically active liquid crystal compound as set forth in claim 1 and exhibiting a chiral smectic C phase.
Claim 7
Dependent Claim
46 words
An optically active liquid crystal compound according to claim 1, expressed by the formula ##STR34## wherein R represents a non-optically active alkyl group or alkoxy group each of 5 to 12 carbon atoms, and R* represents an optically active 1-methylheptyloxy group, 1-methylheptyloxycarbonyl group or 2-methylbutyloxy group.
Claim 8
Dependent Claim
46 words
An optically active liquid crystal compound according to claim 1, expressed by the formula ##STR35## wherein R represents a non-optically active alkyl group or alkoxy group each of 5 to 12 carbon atoms, and R* represents an optically active 1-methylheptyloxy group, 1-methylheptyloxycarbonyl group or 2-methylbutyloxy group.
Claim 9
Dependent Claim
46 words
An optically active liquid crystal compound according to claim 1, expressed by the formula ##STR36## wherein R represents a non-optically active alkyl group or alkoxy group each of 5 to 12 carbon atoms, and R* represents an optically active 1-methylheptyloxy group, 1-methylheptyloxycarbonyl group or 2-methylbutyloxy group.
Claim 10
Dependent Claim
46 words
An optically active liquid crystal compound according to claim 1, expressed by the formula ##STR37## wherein R represents a non-optically active alkyl group or alkoxy group each of 5 to 12 carbon atoms, and R* represents an optically active 1-methylheptyloxy group, 1-methylheptyloxycarbonyl group or 2-methylbutyloxy group.
Claim 11
Dependent Claim
16 words
A light switching element comprising a chiral smectic C liquid crystal composition according to claim 5.
References Cited (Backward Citations)
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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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |