Patent US3583897A successfully refreshed from Google Patents.
US3583897A
Expired / Lapsed
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Electroplating cell for recovering silver from photographic solutions
Assignee: Berkey Photo Inc
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Filing: 1968-09-26
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Granted: 1971-06-08
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Expires: 1988-09-26
Abstract
Abstract A SCHEMATIC DRAWING OF A TANK IS SHOWN WITH A ROTATABLE CYLINDRICAL CATHODE ELECTRODE POSITIONED INWARDLY OF FIXED ANODE PLATES ARRANGED IN A RING AROUND THE CATHODE. A DETAIL IS SHOWN OF IMPELLER BLADES ATTACHED TO A PLATE FOR CIRCULATION OF THE SOLUTION PAST THE ELECTRODES. THE PLATE BEING MOUNTED ON THE SAME SHAFT AND ROTATED WITH THE CYLINDRICAL CATHODE. D R A W I N G
Inventors
- 👤 Spencer B Fulweiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:12
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/20
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |