US3634221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment reclaiming
Assignee: Xerox Corp
•
Filing: 1969-01-28
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Granted: 1972-01-11
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Expires: 1989-01-28
Abstract
Abstract A METHOD AND APPARATUS FOR PHOTOELECTROPHORETICALLY SEPARATING PIGMENT PARTICLES DISPERSED IN A SUSPENSION. THE INVENTION MAY BE USED FOR SEPARATING ELECTRICALLY PHOTOSENSITIVE PARTICLES HAVING DIFFERING SPECTRAL RESPONSES OR SEPARATING ELECTRICALLY PHOSENSITIVE AND RELATIVELY NONELECTRICALLY PHOTOSENSITIVE PARTICLES.
Inventors
- 👤 Ira S Stein
- 👤 Vsevolod Tulagin
- 👤 Vsevolod S Mihajlov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:53
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |