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US5374375A
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Liquid crystal compound and liquid crystal display device
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1992-06-26
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Granted: 1994-12-20
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Expires: 2012-06-26
Abstract
Abstract A liquid crystal compound represented by formula (I), ##STR1## wherein A represents --C 3 H 7 , --C 4 H 9 or --C 8 H 17 ; when A is --C 3 H 7 , m is an integer of 8, 10, 12 or 14; and when A is --C 4 H 9 or --C 8 H 17 , m is an integer of 7 to 14, said compound having an antiferroelectric phase.
Inventors
- 👤 Tomoyuki Yui
- 👤 Masahiro Johno
- 👤 Toshio Watanabe
- 👤 Masamichi Mizukami
- 👤 Yoshihisa Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:56
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; C07; C07C; C07C69/00; C07C69/76; C07C69/94
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A liquid crystal compound represented by formula (I), ##STR72## wherein A represents --C 3 H 7 , --C 4 H 9 or --C 8 H 17 ; when A is --C 3 H 7 , m is an integer of 8, 10, 12 or 14; and when A is --C 4 H 9 , m is an integer of 8, 10, 12 or 14 and when A is --C 8 H 17 , m is an integer of 7, 8, 9, 10, 11, 12, or 14, said compound having an antiferroelectric phase.
Claim 2
Dependent Claim
92 words
A liquid crystal compound represented by formula (I), ##STR72## wherein A represents --C 3 H 7 , --C 4 H 9 or --C 8 H 17 ; when A is --C 3 H 7 , m is an integer of 8, 10, 12 or 14; and when A is --C 4 H 9 , m is an integer of 8, 10, 12 or 14 and when A is --C 8 H 17 , m is an integer of 7, 8, 9, 10, 11, 12, or 14, said compound having an antiferroelectric phase.
Claim 3
Dependent Claim
23 words
The liquid crystal compound of claim 1 represented by formula (I-a) ##STR73## wherein m is an integer of 8, 10, 12 of 14.
Claim 4
Dependent Claim
23 words
The liquid crystal compound of claim 1 represented by formula (I-b) ##STR74## wherein m is an integer of 7, 8, 12 or 14.
Claim 5
Dependent Claim
26 words
The liquid crystal compound of claim 1 represented by formula (I-c) ##STR75## wherein m is an integer of 7, 8, 9, 10, 11, 12 or 14.
Claim 6
Dependent Claim
24 words
The liquid crystal compound of claim 1 which is at least one compound selected from the group consisting of compounds represented by formulas: ##STR76##
Claim 7
Dependent Claim
22 words
A liquid crystal display device containing the liquid crystal compound of formula (I) recited in claim 1 as a liquid crystal component.
Claim 8
Dependent Claim
27 words
The liquid crystal display device according to claim 6, wherein the liquid crystal compound of formula (I) is at least one compound represented by the formulas ##STR77##
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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) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |