US3647659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrophoretic imaging process wherein the imaging electrical field is applied subsequent to imagewise exposure
Assignee: Xerox Corp
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Filing: 1969-10-29
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Granted: 1972-03-07
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Expires: 1989-10-29
Abstract
Abstract A PHOTOELECTROPHORETIC IMAGING SYSTEM WHEREIN A SUSPENSION OF ELECTRICALLY PHOTOSENSITIVE PARTICLES IN AN INSULATING LIQUID MIGRATE IN IMAGE CONFIGUATION WHEN EXPOSED TO IMAGEWISE LIGHT AND, SUBSEQUENTLY, TO ELECTRICAL FIELD. SEPARATION OF THE EXPOSING AND FIELD APPLICATION STEPS IS MADE POSSIBLE BY COATING THE SUSPENSION ON AN ELECTRODE USING A BIASED COATING MEMBER OR BY APPLICATION OF CORONA TO THE SURFACE OF THE SUSPENSION JUST PRIOR TO THE IMAGEWISE EXPOSURE STEP. SUBSEQUENT APPLICATION OF FIELD THEN CAUSES IMAGEWISE PARTICLES MIGRATION.
Inventors
- 👤 Carol K Keller
- 👤 Stephen F Royka
- 👤 Christopher Snelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:10
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 0
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |