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US4285801A
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Electrophoretic display composition
Assignee: Xerox Corp
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Filing: 1979-09-20
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Granted: 1981-08-25
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Expires: 1999-09-20
Abstract
Abstract A suspension for electrophoretic display systems, such as the display systems shown in U.S. Pat. No. 3,668,106, is described. The particles in the suspension are coated with a highly fluorinated polymeric material, which acts as a dispersant. Preferably, the suspension also includes a charge control agent.
Inventors
- 👤 Anne A. Chiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:30
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
An electrophoretic display composition comprising particles suspended in a liquid, at least a portion of said particles being at least partially coated with a highly fluorinated polymeric material of highly fluorinated organic compounds having chains longer than C 8 , said polymeric material being a dispersant, a charge control agent or a matrix for a charge control agent.
Claim 2
Dependent Claim
58 words
An electrophoretic display composition comprising particles suspended in a liquid, at least a portion of said particles being at least partially coated with a highly fluorinated polymeric material of highly fluorinated organic compounds having chains longer than C 8 , said polymeric material being a dispersant, a charge control agent or a matrix for a charge control agent.
Claim 3
Dependent Claim
63 words
The electrophoretic display composition of claim 1 wherein said highly fluorinated long-chain alkyl or alkyl aryl carboxylic acids, sulfonic acids and phosphoric acids, their esters and metal salts; highly fluorinated long-chain alkyl or alkyl aryl alcohols; highly fluorinated A-B block copolymers of long-chain alkyl or alkyl aryl alcohol with ethylene glycol or propylene glycol; and highly fluorinated poly alkyl methacrylate and its copolymers.
Claim 4
Dependent Claim
15 words
The electrophoretic display composition of claim 1 and further including a non-polymeric charge control agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |