Patent US3605693A successfully refreshed from Google Patents.
US3605693A
Expired / Lapsed
US
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Development electrode
Assignee: Pitney Bowes Inc
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Filing: 1969-09-09
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Granted: 1971-09-20
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Expires: 1989-09-09
Abstract
Abstract A POROUS, ELECTRICALLY FLOATING ELECTRODE, SUCH A METAL SCREEN, IS EMPLOYED IN A LIQUID TONER PROCESS FOR ELECTROSTATIC IMAGE DEVELOPMENT.
Inventors
- 👤 Gilbert Zweig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/108
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |