US5437812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal compounds having perfluoroether terminal portions
Assignee: 3M Innovative Properties Co
•
Filing: 1993-04-16
•
Granted: 1995-08-01
•
Expires: 2013-04-16
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
- 👤 Marc D. Radcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:32
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; 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: 8
Claim 1
Independent Claim
45 words
Fluorine-containing achiral liquid crystal compounds comprising a fluorocarbon terminal portion having at least one catenary ether oxygen located between two flurocarbons and a hydrocarbon terminal portion, the terminal portions being connected by a central core, the compounds having smectic mesophases or having latent smectic mesophases.
Claim 2
Dependent Claim
45 words
Fluorine-containing achiral liquid crystal compounds comprising a fluorocarbon terminal portion having at least one catenary ether oxygen located between two flurocarbons and a hydrocarbon terminal portion, the terminal portions being connected by a central core, the compounds having smectic mesophases or having latent smectic mesophases.
Claim 3
Dependent Claim
91 words
Compounds of claim 1 wherein said fluorocarbon terminal portion can be represented by the formula -D(C x F 2x O) z C y F 2+1 where x is independently 1 to 10 for each C x F 2x O group, y is 1 to 10, z is 1 to 10 and D is a covalent bond, ##STR71## where r and r' are independently 1 to 20, s is independently 1 to 10 for each (C s H 2s O) , t is 1 to 6 and p is 0 to 4.
Claim 4
Dependent Claim
47 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR72## 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 5
Dependent Claim
23 words
A compound according to claim 1 wherein said compound can be represented by the formula ##STR73## 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 ##STR74## where t is 6, 8 or 10.
Claim 7
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 8
Dependent Claim
18 words
A liquid crystal display device containing said compound of claim 1 wherein said compound has a smectic mesophase.
References Cited (Backward Citations)
US4411494A
Cited
US4367924A
Cited
US4419664A
Cited
US4528562A
Cited
JPS62129251A
Cited
US4886619A
Cited
US5132041A
Cited
US5051527A
Cited
WO1990001021A1
Cited
WO1990001056A1
Cited
US5082587A
Cited
EP0405868A2
Cited
WO1991000897A1
Cited
JPH0393748A
Cited
EP0439190A2
Cited
JPH0426679A
Cited
US5087672A
Cited
US5262082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-31 | 1999-01-30 | 1999-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-31 | 2003-01-30 | 2003-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-31 | 2007-01-30 | 2007-08-01 | $7700.00 | Window Closed / Lapsed |