Patent US2493396A successfully refreshed from Google Patents.
US2493396A
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Recovery of silver from solutions of silver salts
Assignee: Timber Engineering Co
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Filing: 1945-09-01
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Granted: 1950-01-03
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Expires: 1965-09-01
Abstract
No abstract record available.
Inventors
- 👤 Farber Eduard
- 👤 Sciascia Matthew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:12
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/04; C; C01; C01G; C01G5/00; C01G5/003; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; G; G03; G03C; G03C5/00; G03C5/26; G03C5/395; G03C5/3952; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A PROCESS FOR RECOVERING SILVER FROM A DILUTE SOLUTION OF A SILVER COMPOUND, WHICH COMPRISE CONTRACTING SAID SOLUTION WITH A SOLID INSOLUBLE LIGNIN, SEPARATING THE SOLUTION THEREFROM AND RECOVERING THE SILVER FROM THE LIGNIN, SAID LIGNIN HAVING BEEN ACTIVATED BY THE REMOVAL OF MINERALS THEREFROM BY WASHING WITH A DILUTE MINERAL ACID AND THE REMOVAL OF ORGANIC NON-LIGNEOUS MATTERIALS THEREFROM BY WASHING WITH AN ALKALI, SAID ACID AND SAID ALKALI BEING NON-REACTIVE WITH SAID LIGNIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |