Patent US2928500A successfully refreshed from Google Patents.
US3607259A
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US
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Package of charged photoconductive recording elements for electrophotography
Assignee: Research Laboratories of Australia Pty Ltd
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Filing: 1967-12-27
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Granted: 1971-09-21
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Expires: 1987-12-27
Abstract
Abstract An electrophotographic recording element which is precharged and held in charged condition for subsequent reuse, utilizing a backing member of a resistivity sufficient to prevent leakage away of the applied charge which can be rendered at least temporarily conductive prior to exposure to permit the charge to leak away at image areas.
Inventors
- 👤 Robert J Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:50
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G13/00; G03G13/22; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |