Patent US2800158A successfully refreshed from Google Patents.
Patent US5262082A successfully refreshed from Google Patents.
US5262082A
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Ferroelectric liquid crystal compounds having perfluoroether terminal portions
Assignee: 3M Innovative Properties Co
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Filing: 1992-04-28
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Granted: 1993-11-16
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Expires: 2012-04-28
Abstract
Abstract Fluorine-containing liquid crystal compounds are provided. The compounds comprise a fluorocarbon terminal portion having at least one catenary ether oxygen and a hydrocarbon terminal portion, the terminal portion being connected by a central core, the compounds having smectic mesophases or having latent smectic mesophases.
Inventors
- 👤 Eugene P. Janulis
- 👤 Gilbert C. Johnson
- 👤 Patricia M. Savu
- 👤 Terence D. Spawn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:44
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C07C; C07C255/00; C07C255/49; C07C255/55; C07C309/00; C07C309/63; C07C309/64; C07C309/65; C07C309/72; C07C309/73; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/123; C07C43/126; C07C43/13; C07C43/137; C07C43/14; C07C43/178; C07C43/1786; C07C69/00; C07C69/76; C07C69/84; C07C69/92; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D239/28; C07D239/32; C07D239/34; C07D239/36; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/32; C09K19/322; C09K19/3441; C09K19/3444; C09K19/345; C09K19/3458; C09K19/3469; C09K19/3491; C09K2019/325
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
157 words
An achiral fluorine-containing liquid crystal compound of the general formula I: ##STR45## where M, N, and P are each independently ##STR46## a, b, and c are each independently zero or an integer of from 1 to 3 with the proviso that the sum of a+b+c be at least 2; each A and B are non-directionally and independently a covalent bond, ##STR47## each X, Y, and Z are independently --H, --Cl, --F, --Br, --I, --OH, --OCH 3 , --CN, or --NO 2 ; each 1, m, and n are independently zero or an integer of 1 to 4, D is ##STR48## and q and q' are independently 1 to 20, and R can be straight chain or branched; and R f is (C x F 2x O) z C y F 2y+1 where x is independently 1 to 10 for each C x F 2x O group, y is 1 to 10 and z is 1 to 6.
Claim 2
Dependent Claim
157 words
An achiral fluorine-containing liquid crystal compound of the general formula I: ##STR45## where M, N, and P are each independently ##STR46## a, b, and c are each independently zero or an integer of from 1 to 3 with the proviso that the sum of a+b+c be at least 2; each A and B are non-directionally and independently a covalent bond, ##STR47## each X, Y, and Z are independently --H, --Cl, --F, --Br, --I, --OH, --OCH 3 , --CN, or --NO 2 ; each 1, m, and n are independently zero or an integer of 1 to 4, D is ##STR48## and q and q' are independently 1 to 20, and R can be straight chain or branched; and R f is (C x F 2x O) z C y F 2y+1 where x is independently 1 to 10 for each C x F 2x O group, y is 1 to 10 and z is 1 to 6.
Claim 3
Dependent Claim
47 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR49## where d is 5 to 10, x is independently 1 to 3 for each C x F 2x O group, y is 1 to 4 and z is 1 to 3.
Claim 4
Dependent Claim
23 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR50## where t is 6, 8 or 10.
Claim 5
Dependent Claim
23 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR51## where t is 6, 8 or 10.
Claim 6
Dependent Claim
23 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR52## where t is 6, 8 or 10.
Claim 7
Dependent Claim
16 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR53##
Claim 8
Dependent Claim
23 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR54## where t is 6, 8 or 10.
Claim 9
Dependent Claim
23 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR55## where t is 6, 8 or 10.
Claim 10
Dependent Claim
16 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR56##
Claim 11
Dependent Claim
16 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR57##
Claim 12
Dependent Claim
21 words
A compound according to claim 1 wherein R f is --CF 2 OCF 2 CF 2 OC 4 F 9 .
Claim 13
Dependent Claim
38 words
Liquid crystal mixtures comprising at least one compound according to claim 1 and at least one chiral liquid crystal compound, said chiral liquid crystal compound being present in an amount sufficient to provide the mixture with ferroelectric properties.
Claim 14
Dependent Claim
18 words
A liquid crystal display device containing said compound of claim 1 wherein said compound has a smectic mesophase.
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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) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |