US3553093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photoelectrophoretic imaging process
Assignee: Xerox Corp
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Filing: 1965-03-19
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Granted: 1971-01-05
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Expires: 1985-03-19
Abstract
Abstract A SUSPENSION COMPRISING ELECTRICALLY PHOTOSENSITIVE PARTICLES DISPERSED IN A CARRIER LIQUID IS EXPOSED TO IMAGEWISE LIGHT AND FIELD BETWEEN AT LEAST TWO ELECTRODES FORMING A PIGMENT IMAGE ON THE SURFACE OF ONE OF THE ELECTRODES. THE OTHER ELECTRODE IS REMOVED, CLEANED OR REPLACED AND THE IMAGEWISE EXPOSURE AND FIELD APPLICATION IS REPEATED AT LEAST ONE ADDITONAL TIME, IMPROVING THE QUALITY OF THE FINAL IMAGE.
Inventors
- 👤 Robert C Putnam
- 👤 Ira S Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:43
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07D213/44; C07D213/46; C07D213/50; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/34; C07D311/38; C07D311/58; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/14; C07D333/20; C07D335/00; C07D335/04; C07D335/06; G; G03; G03G; G03G17/00; G03G17/04; G03G5/00; G03G5/12
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |