US3820987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrophoretic imaging with fixing on a separate electrode
Assignee: Xerox Corp
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Filing: 1972-12-06
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Granted: 1974-06-28
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Expires: 1992-12-06
Abstract
Abstract A photoelectrophoretic imaging system wherein electrically photosenstive pigment particles are dispersed in an insulating liquid exposed to a light image while subjected to an electrical field causing particle migration in image configuration. The particle pigment image is fixed by utilizing resinous particles which can be preferentially migrated to the image-bearing surface. Application of solvent or heat fixes the images.
Inventors
- 👤 J Wells
- 👤 A Sheckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The method of claim 1 wherein step (b) is repeated at least one additional time prior to step (c).
Claim 2
Dependent Claim
14 words
The method of claim 1 wherein said softening is accomplished by application of heat.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said softening is accomplished by application of solvent.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said resinous particles comprise polyvinyl chloride.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said resinous particles comprise a thermoplastic fluorocarbon copolymer.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said resinous particles comprise melamine formaldehyde.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said resinous particles comprise methylmethacrylate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |