Silver recovery device for photo fixer solutions
Abstract
Abstract A PLASTIC CYLINDRICAL CONTAINER HAVING A REMOVABLE TOP LID WHICH IS ADAPTED TO RECEIVE A QUANTITY OF USED PHOTOGRAPHIC SOLUTION. AN ANODE STRIP EXTENDS IN A SPIRAL CONFIGURATION ABUTTING THE INSIDE WALLS OF THE CONTAINER. THE ANODE COMPRISES A PLURALITY OF TURNS WHICH DECREASE IN AXIAL SPACING FROM TOP TO BOTTOM ALONG THE CONTAINER WALLS. A CENTRAL CATHODE IN THE FORM OF A FLEXIBLE BLADE IS SUSPENDED FROM THE CENTER OF THE CONTAINER COVER AND IS SPACED FROM THE ANODE. THE CATHODE EXTENDS ALONG THE FULL HEIGHT OF THE CONTAINER. A DIRECT CURRENT POWER SUPPLY IS CONNECTED TO THE ANODE THROUGH THE TOP CONTAINER WALL AND THROUGH THE COVER TO THE CATHODE. RECOVERED SILVER IS REMOVED FROM THE CATHODE BY FLEXING THE BLADE SURFACES SLIGHTLY.
Inventors
- 👤 Robert J Cooper
- 👤 Victor V Carnell
Bibliographic Details
Claims Analysis
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |