US5171471A
Expired / Lapsed
US
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Dioxane liquid crystal compounds
Assignee: Showa Shell Sekiyu KK
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Filing: 1992-01-31
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Granted: 1992-12-15
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Expires: 2012-01-31
Abstract
Abstract Novel ferroelectric and antiferroelectric liquid crystal compounds of the invention, which comprise those showing optically tristable states in phase S*(3), have a wide range of phase transition temperature so as to be not only preferably used solely as display element material but also mixed with any other liquid crystal to desiredly expand the above range wider and make optical response time faster. Typical compounds are represented by <IMAGE> +TR <IMAGE> <IMAGE> +TR <IMAGE> <IMAGE> +TR <IMAGE> in which Z means CF3, C2F5, CHF2, CH2F, CClF2, CCl2F, CF3CCl2 or C3F7, m' and n' are same or different with each other and each is an integer of 1-20.
Inventors
- 👤 Yoshiichi Suzuki
- 👤 Takashi Hagiwara
- 👤 Koichi Numazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:08
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C09K19/0266; C07; C07D; C07D319/00; C07D319/04; C07D319/06; C09K19/04; C09K19/06; C09K19/34; C09K19/3402; C09K2019/3422
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A ferroelectric liquid crystal compound represented by the formula (I) ##STR40## wherein (A) and (B) each independently means ##STR41## R 1 means a C 1 -C 20 alkyl group, R 2 means a group selected from a group consisting of a C 4 -C 12 alkyl group and an ester-containing group which is represented by the formula --R 3 COOR 4 wherein R 3 is a C 1 -C 2 alkylene group and R 4 is a C 1 -C 4 alkyl group and Z means CF 3 or C 2 F 5 .
Claim 2
Dependent Claim
94 words
A ferroelectric liquid crystal compound represented by the formula (I) ##STR40## wherein (A) and (B) each independently means ##STR41## R 1 means a C 1 -C 20 alkyl group, R 2 means a group selected from a group consisting of a C 4 -C 12 alkyl group and an ester-containing group which is represented by the formula --R 3 COOR 4 wherein R 3 is a C 1 -C 2 alkylene group and R 4 is a C 1 -C 4 alkyl group and Z means CF 3 or C 2 F 5 .
Claim 3
Dependent Claim
49 words
An antiferroelectric liquid crystal compound represented by the formula (II), which shows optically tristable states in S*.sub.(3) phase ##STR42## wherein (B) means ##STR43## R 5 and R 6 each independently means a C 5 -C 10 alkyl group and Z means CF 3 or C 2 F 5 .
Claim 4
Dependent Claim
49 words
An antiferroelectric liquid crystal compound represented by the formula (II), which shows optically tristable states in S*.sub.(3) phase ##STR42## wherein (B) means ##STR43## R 5 and R 6 each independently means a C 5 -C 10 alkyl group and Z means CF 3 or C 2 F 5 .
Claim 5
Dependent Claim
22 words
An antiferroelectric liquid crystal compound in claim 2, where (B) means a ##STR44## group, which shows optically tristable states in S*.sub.(3) phase.
Claim 6
Dependent Claim
22 words
An antiferroelectric liquid crystal compound in claim 2, wherein (B) means a ##STR45## group, which shows optically tristable states in S*.sub.(3) phase.
Claim 7
Dependent Claim
23 words
An antiferroelectric liquid crystal compound in claim 2, wherein Z means a CF 3 , which shows optically tristable states in S*.sub.(3) phase.
Claim 8
Dependent Claim
23 words
An antiferroelectric liquid crystal compound in claim 3, wherein Z means a CF 3 , which shows optically tristable states in S*.sub.(3) phase.
Claim 9
Dependent Claim
23 words
An antiferroelectric liquid crystal compound in claim 4, wherein Z means a CF 3 , which shows optically tristable states in S*.sub.(3) phase.
Claim 10
Dependent Claim
19 words
An antiferroelectric liquid crystal compound represented by the formula (III), which shows optically tristable states in S*.sub.(3) phase ##STR46##
Claim 11
Dependent Claim
19 words
An antiferroelectric liquid crystal compound represented by the formula (III), which shows optically tristable states in S*.sub.(3) phase ##STR46##
Claim 12
Dependent Claim
19 words
An antiferroelectric liquid crystal compound represented by the formula (IV), which shows optically tristable states in S*.sub.(3) phase ##STR47##
Claim 13
Dependent Claim
19 words
An antiferroelectric liquid crystal compound represented by the formula (IV), which shows optically tristable states in S*.sub.(3) phase ##STR47##
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-12-15 | 1996-06-15 | 1996-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-15 | 2000-06-15 | 2000-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-15 | 2004-06-15 | 2004-12-15 | $7700.00 | Window Closed / Lapsed |