US3799775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic system
Assignee: Xerox Corp
•
Filing: 1972-07-13
•
Granted: 1974-03-26
•
Expires: 1992-07-13
Abstract
Abstract AN ELECTRICALLY CONDUCTIVE YET ELECTRONIC CHARGE CARRIER BLOCKING INTERFACE COMPRISING GRAPHITE BETWEEN A SUPPORT BASE AND PHOTOCONDUCTIVE INSULATING MATERIAL OF A XEROGRAPHIC PLATE, AND A PROCESS OF MAKING AND USING THE PLATE.
Inventors
- 👤 N Petruzzella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:06
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G15/00; G03G15/22; G03G5/10; G03G5/102; G03G5/104; G03G5/142; G03G5/144
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |