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US4801756A
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Liquid crystal compound
Assignee: Alps Alpine Co Ltd
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Filing: 1986-12-30
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Granted: 1989-01-31
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Expires: 2006-12-30
Abstract
Abstract There is provided a chiral compound of the formula ##STR1## where m, 1, and k are integers in the range of 4≦m≦14, 0≦l≦7, 0≦k≦8, respectively, which has the property of being a liquid crystal in itself or can be added to a liquid crystal without any adverse effect on the liquid crystal. The compound induces twisted arrangement when added to a liquid crystal of TN mode or phase change mode, and it increases the spontaneous polarization when added to a SmC* liquid crystal.
Inventors
- 👤 Mitsuru Kano
- 👤 Jun Nakanowatari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:07
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/126
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A liquid crystal compound represented by Formula I below: ##STR22## where m, l, and k are integers in the range of 4≦m≦14, 0≦l≦7, 1≦k≦8, respectively, excluding the case where l=1 and k=1, the asterisk (*) indicates an asymmetric carbon atom, and the compound should be optically active.
Claim 2
Dependent Claim
47 words
A liquid crystal compound represented by Formula I below: ##STR22## where m, l, and k are integers in the range of 4≦m≦14, 0≦l≦7, 1≦k≦8, respectively, excluding the case where l=1 and k=1, the asterisk (*) indicates an asymmetric carbon atom, and the compound should be optically active.
Claim 3
Dependent Claim
17 words
A liquid crystal compound according to claim 1, wherein m=8 or 12, l=4 or 0, and k=1.
Claim 4
Dependent Claim
15 words
A liquid crystal compound according to claim 1, wherein m=8 or 12, l=0, and k=5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |