Patent US4826979A successfully refreshed from Google Patents.
US4826979A
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Liquid crystal compound
Assignee: Alps Alpine Co Ltd
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Filing: 1987-02-19
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Granted: 1989-05-02
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Expires: 2007-02-19
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## (S=1 or 2), Ar 2 represents ##STR3## 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
2026-11-01 12:05
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3452; C09K19/3455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A liquid crystal compound comprising the following general formula (1): ##STR34## where i, j and k individually represent an integer within a range: 1≦i≦5, 0≦j≦4, 6≦k≦12, Ar 1 represents ##STR35## (S=1), Ar 2 represents a 1,4-phenylene ring system of ##STR36## * represents an asymmetric carbon and the compound is required to be optically active.
Claim 2
Dependent Claim
54 words
A liquid crystal compound comprising the following general formula (1): ##STR34## where i, j and k individually represent an integer within a range: 1≦i≦5, 0≦j≦4, 6≦k≦12, Ar 1 represents ##STR35## (S=1), Ar 2 represents a 1,4-phenylene ring system of ##STR36## * represents an asymmetric carbon and the compound is required to be optically active.
References Cited (Backward Citations)
US4311610A
Cited
GB2092169A
Cited
US4623477A
Cited
EP0149238A2
Cited
US4713197A
Cited
DE3404117A1
Cited
US4657695A
Cited
WO1986000087A1
Cited
WO1986000067A1
Cited
US4709030A
Cited
JPS61215375A
Cited
US4721367A
Cited
DE3515373A1
Cited
DE3518734A1
Cited
DE3600052A1
Cited
JPH0692276A
Cited
JPH06200071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |