US3589895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic developing method suited for transfer electrophotography without cleaning
Assignee: Eastman Kodak Co
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Filing: 1967-07-17
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Granted: 1971-06-29
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Expires: 1987-07-17
Abstract
Abstract A METHOD OF TONING AN ELECTROSTATIC IMAGE ON A SURFACE IN TWO STEPS: (1) BRUSHING, RUBBING OR OTHERWISE CONTACTING THE IMAGE-BEARING SURFACE WITH FIBERS, PARTICLES OR OTHER MATERIALS CAPABLE OF PROPERLY TRIBOELECTRICALLY CHARGING TONER ON THE SURFACE TO THE PROPER POLARITY IN PRESENCE OF A FIELD ADAPTED TO REPEL IMPROPERLY CHARGED TONER FROM THE SURFACE, AND (2) TONING THE IMAGE, FOR EXAMPLE, BY BRUSHING. THIS METHOD IS PARTICULARLY SUITED TO REPETITIVE TRANSFER XEROGRAPHY WITHOUT CLEANING OF THE SURFACE OF THE PHOTOCONDUCTIVE ELEMENT.
Inventors
- 👤 Ivan B Ville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G21/00; G03G21/0005; G03G21/0047; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 0
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |