US4835274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal compound
Assignee: Alps Alpine Co Ltd
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Filing: 1987-02-20
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Granted: 1989-05-30
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Expires: 2007-02-20
Abstract
Abstract A liquid crystal compound comprising the following general formula (1): ##STR1## where i, j and k individually represent an integer within a range: 1≦i≦8, 0≦j≦7, 4≦k≦14, Ar 1 represents ##STR2## *represents an asymmetric carbon and the compound is required to be optically active. The compound can provide various merits as the chiral substance such as satisfactory optical rotation, capability of inducing twisted arrangement when added to the TN system or phase transition system liquid crystal mixture, and of enlarging the liquid crystal temperature range when added to SmC* liquid crystal mixture.
Inventors
- 👤 Mitsuru Kano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:19
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C07; C07D; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/14; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/34; C09K19/3452; C09K19/3455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A liquid crystal compound comprising the following general formula (1): ##STR29## where i, j and k individually represent an integer within a range: 1≦i≦5, 0≦j≦4, 6≦k≦12, Ar 1 represents ##STR30## * represents an asymmetric carbon and the compound is required to be optically active.
Claim 2
Dependent Claim
44 words
A liquid crystal compound comprising the following general formula (1): ##STR29## where i, j and k individually represent an integer within a range: 1≦i≦5, 0≦j≦4, 6≦k≦12, Ar 1 represents ##STR30## * represents an asymmetric carbon and the compound is required to be optically active.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |