US5643673A
Expired / Lapsed
US
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Black electrophoretic particles and method of manufacture
Assignee: AUO Corp
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Filing: 1993-10-22
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Granted: 1997-07-01
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Expires: 2013-10-22
Abstract
Abstract The present invention are dielectric black particles for use in electrophoretic images displays, electrostatic toner or the like, and the corresponding method of manufacturing the same. The present invention black particles are latex particles formed by a polymerization technique, wherein the latex particles are stained to a high degree of blackness with a metal oxide.
Inventors
- 👤 Wei-Hsin Hou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:56
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/0802; G03G9/0804; G03G9/0806; C; C08; C08F; C08F8/00; C08F8/42; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G03G17/00; G03G17/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
37 words
Multilayer dielectric particles comprising a composite latex polymer having at least one core structure and a shell structure, said core structure having residual double bonds which have reacted with a metal oxide that produces a black color.
Claim 2
Dependent Claim
37 words
Multilayer dielectric particles comprising a composite latex polymer having at least one core structure and a shell structure, said core structure having residual double bonds which have reacted with a metal oxide that produces a black color.
Claim 3
Dependent Claim
32 words
The particles according to claim 1, wherein each of said particles is a composite latex having a core structure and at least one shell layer formed by a seeded emulsion polymerization technique.
Claim 4
Dependent Claim
38 words
The particles according to claim 1, having a plurality of shell layers including an outermost shell layer and a second outermost shell layer closest to the core and wherein second outermost shell layer contains said residual double bonds.
Claim 5
Dependent Claim
14 words
The particles according to claim 2, wherein said core structure comprises a poly(butadiene-co-styrene) polymer.
Claim 6
Dependent Claim
18 words
The particles according to claim 4, wherein said at least one shell layer comprises a poly(styrene-co-methacrylic add) polymer.
Claim 7
Dependent Claim
14 words
The particles according to claim 2, wherein said core structure comprises a polystyrene polymer.
Claim 8
Dependent Claim
17 words
The particles according to claim 6, wherein said at least one shell layer comprises a polybutadiene polymer.
Claim 9
Dependent Claim
18 words
The particles according to claim 6, wherein said at least one shell layer comprises a poly(styrene-co-methacrylic acid) polymer.
Claim 10
Dependent Claim
42 words
The particles according to claim 8, wherein said polystyrene polymer core structure is surrounded by at least one shell layer wherein polybutadiene polymer said at least one shell layer polybutadiene polymer is surrounded by at least one shell layer poly(styrene-co-methacrylic acid) polymer.
Claim 11
Dependent Claim
13 words
The particles according to claim 1, wherein said metal oxide comprises osmium tetroxide.
Claim 12
Dependent Claim
23 words
The particles according to claim 1, wherein said particle is hollow, having a hollow core structure encapsulated by at least one shell layer.
Claim 13
Dependent Claim
16 words
The particles according to claim 1, wherein said composite latex polymer is a poly(butadiene-co-styrene-co-methacrylic acid) polymer.
Claim 14
Dependent Claim
30 words
A multilayer dielectric particle comprising a latex shell structure and a latex core structure having residual double bonds which have reacted with and been stained black by a metal oxide.
Claim 15
Dependent Claim
30 words
A multilayer dielectric particle comprising a latex shell structure and a latex core structure having residual double bonds which have reacted with and been stained black by a metal oxide.
Claim 16
Dependent Claim
56 words
A multilayer dielectric particle comprising a composite latex polymer having a core structure and at least one outer shell structure, wherein said core structure has residual double bonds that have reacted with a metal oxide which produces a black color, wherein said metal oxide is selected from the group consisting of osmium tetroxide and ruthenium tetroxide.
Claim 17
Dependent Claim
56 words
A multilayer dielectric particle comprising a composite latex polymer having a core structure and at least one outer shell structure, wherein said core structure has residual double bonds that have reacted with a metal oxide which produces a black color, wherein said metal oxide is selected from the group consisting of osmium tetroxide and ruthenium tetroxide.
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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) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |