US2712931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for recovering silver
Assignee: Pako Corp
•
Filing: 1951-04-16
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Granted: 1955-07-12
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Expires: 1971-04-16
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Maddock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:45
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/395; G03C5/3952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
AN APPARATUS FOR RECOVERING SILVER FROM A PHOTOGRAPHIC FIXING SOLUTION HAVING IN COMBINATION, A CONTAINER IN WHICH SAID SOLUTION IS DISPOSED, A SECOND CONTAINER, A MEMBER OF ALUMINUM METAL DISPOSED IN SAID SECOND CONTAINER AND EXTENDING ABOUT AND SPACED FROM THE WALL THEREOF, A RETICULATE TUBE AT THE CENTRAL PORTION OF SAID SECOND CONTAINER, A FILTER BETWEEN SAID TUBE AND SAID MEMBER AND SPACED A SHORT DISTANCE FROM SAID MEMBER, A REMOVABLE COVER FOR SAID SECOND CONTAINER, A CONDUIT EXTENDING THROUGH SAID COVER AND EXTENDING TO THE TOP OF SAID TUBE, SAID CONDUIT EXTENDING TO SAID FIRST MENTIONED CONTAINER, A PUMP, A SECOND CONDUIT EXTENDING THROUGH SAID COVER AT ONE SIDE OF SAID FIRST MENTIONED CONDUIT AND EXTENDING TO THE OUTLET SIDE OF SAID PUMP, AND A THIRD CONDUIT EXTENDING FROM THE INLET SIDE OF SAID PUMP TO SAID FIRST MENTIONED CONTAINER WHEREBY SAID SOLUTION CAN BE CONTINUOUSLY PUMPED FROM SAID FIRST MENTIONED CONTAINER TO SAID SECOND CONTAINER AND INTO CONTACT WITH SAID MEMBER, THROUGH SAID FILTER AND BACK TO SAID FIRST MENTIONED CONTAINER.
Claim 2
Independent Claim
174 words
AN APPARATUS FOR RECOVERING SILVER FROM A PHOTOGRAPHIC FIXING SOLUTION HAVING IN COMBINATION, A CONTAINER IN WHICH SAID SOLUTION IS DISPOSED, A SECOND CONTAINER, A MEMBER OF ALUMINUM METAL DISPOSED IN SAID SECOND CONTAINER AND EXTENDING ABOUT AND SPACED FROM THE WALL THEREOF, A RETICULATE TUBE AT THE CENTRAL PORTION OF SAID SECOND CONTAINER, A FILTER BETWEEN SAID TUBE AND SAID MEMBER AND SPACED A SHORT DISTANCE FROM SAID MEMBER, A REMOVABLE COVER FOR SAID SECOND CONTAINER, A CONDUIT EXTENDING THROUGH SAID COVER AND EXTENDING TO THE TOP OF SAID TUBE, SAID CONDUIT EXTENDING TO SAID FIRST MENTIONED CONTAINER, A PUMP, A SECOND CONDUIT EXTENDING THROUGH SAID COVER AT ONE SIDE OF SAID FIRST MENTIONED CONDUIT AND EXTENDING TO THE OUTLET SIDE OF SAID PUMP, AND A THIRD CONDUIT EXTENDING FROM THE INLET SIDE OF SAID PUMP TO SAID FIRST MENTIONED CONTAINER WHEREBY SAID SOLUTION CAN BE CONTINUOUSLY PUMPED FROM SAID FIRST MENTIONED CONTAINER TO SAID SECOND CONTAINER AND INTO CONTACT WITH SAID MEMBER, THROUGH SAID FILTER AND BACK TO SAID FIRST MENTIONED CONTAINER.
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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) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |