US4780242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen-containing, optically active liquid crystal compound and liquid crystal composition containing same
Assignee: JNC Corp
•
Filing: 1986-03-11
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Granted: 1988-10-25
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Expires: 2006-03-11
Abstract
Abstract A novel optically active liquid crystal compound and a liquid crystal composition containing the same are provided, which compound is expressed by the formula ##STR1## wherein R 1 is alkyl or alkoxy of 4-18 C; R 2 is alkyl, alkoxy, acyl or alkoxymethyl of 4-18 C; but either one of R 1 or R 2 is an optically active group; either one of X 1 or X 2 is halogen atom and the other is H; m and n each are 0 or 1 and m+n is 0 or 1.
Inventors
- 👤 Kazutoshi Miyazawa
- 👤 Hiromichi Inoue
- 👤 Shinichi Saito
- 👤 Takashi Inukai
- 👤 Kanetsugu Terashima
- 👤 Mitsuyoshi Inchihashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:17
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/46; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
An optically active liquid crystal compound of the formula ##STR100## wherein R 1 * is an optically active alkoxy group of 4 to 12 carbon atoms, R 2 is an optically inactive alkyl, alkoxy or alkoxycarbonyl group each of which has 4 to 12 carbon atoms, and X is F or Cl.
Claim 2
Dependent Claim
52 words
An optically active liquid crystal compound of the formula ##STR100## wherein R 1 * is an optically active alkoxy group of 4 to 12 carbon atoms, R 2 is an optically inactive alkyl, alkoxy or alkoxycarbonyl group each of which has 4 to 12 carbon atoms, and X is F or Cl.
Claim 3
Dependent Claim
26 words
A liquid crystal composition having at least two components at least one of which is an optically active liquid crystal compound as defined in claim 1.
Claim 4
Dependent Claim
28 words
A chiral smectic liquid crystal composition having at least two components at least one of which is an optically active liquid crystal compound as defined 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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |