Patent US2655944A successfully refreshed from Google Patents.
Patent US3645874A successfully refreshed from Google Patents.
US3645874A
Expired / Lapsed
US
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Image density control in photoelectrophoretic imaging
Assignee: Xerox Corp
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Filing: 1969-10-03
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Granted: 1972-02-29
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Expires: 1989-10-03
Abstract
Abstract A PHOTOELECTROPHORETIC IMAGING SYSTEM IS DISCLOSED WHEREBY THE DENSITY OF THE IMAGE PRODUCED AT HIGH SPEEDS IS INCREASED BY THE INTRODUCTION OF A "DENSITY CONTROL" ELECTRODE.
Inventors
- 👤 John B Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:39
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |