US3155504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic materials
Assignee: Agfa Gevaert NV
•
Filing: 1962-07-25
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Granted: 1964-11-03
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Damm Klaus
- 👤 Gesierich Wolf
- 👤 Heyl Gerhard
- 👤 Nissl Franz
- 👤 Schnurrbusch Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
IN A PROCESS FOR THE PORDUCTION OF ELECTROPHOTOGRAPHIC REPRODUCTIONS BY ELECTROSTATICALLY CHARGING AN ELECTROPHOTOGRAPHIC LAYER BEING OF ZINC OXIDE IN AN ELECTRICALLY INSULATING FILM-FORMING BINDING AGENT, EXPOSING THE CHARGED LAYER TO AN OPTICAL IMAGE TO ELECTRICALLY DISCHARGE THE LAYER IN ACCORDANCE WITH ITS EXPOSURE TO LIGHT, AND THEN DEVELOPING THE RESULTING ELECTROSTATIC IMAGE, THE IMPROVEMENT ACCORDING TO WHICH THE ELECTROPHOTOGRAPHIC LAYER IS MADE WITH ZINC OXIDE WHICH HAS BEEN TREATED WITH AN ORGANOSILICON COMPOUND SELECTED FROM THOSE HAVING THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
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US2610167A
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US2615006A
Cited
US2579332A
Cited
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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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |