US2658827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering precious and base metals
Assignee: Individual
•
Filing: 1950-04-12
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Granted: 1953-11-10
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Expires: 1970-04-12
Abstract
No abstract record available.
Inventors
- 👤 R Alfonso Rizo-Patron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:47
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/08; C22B15/00; C22B15/0026; C22B15/0028; C22B15/003; C22B15/0032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF RECOVERING IN A JOINT OPERATION ON THEIR RESPECTIVE ORES PRECIOUS METALS SUCH AS GOLD AND SILVER, AND BASE METALS SUCH AS LEAD, COPPER AND ZINC, WHICH COMPRISES SUBJECTING AN ORE OR TAILING OR CONCENTRATE OF SAID PRECIOUS METALS TO TREATMENT IN AN ALKALINE PULP WITH A CYANIDE AND WITH NATURALLY-OCCURRING LOWVOLATILE-MATTER COALS HAVING LOW ADSORPTIVE CAPACITY FOR PRECIOUS METALS, OF THE GROUP CONSISTING OF ANTHRACITE COAL, IMPURE GRAPHITIC COALS, CARBONACEOUS SCHISTS, COAL SHALES AND MIXTURES THEREOF, IN QUANTITY GREATER THAN 1% BY WEIGHT OF THE PRECIOUS METAL ORE AND SUFFICIENT BOTH TO ADSORB SUBSTANTIALLY ALL OF THE PRECIOUS METALS FROM SAID PULP AND TO SERVE AS A SUBSTANTIAL AND IMPORTANT PART OF THE FUEL AND REDUCING AGENT NEEDED IN THE REDUCTION OF THE BASE METAL ORE, REMOVING THE PRECIOUS-METAL-BEARING COAL FROM
Claim 2
Independent Claim
134 words
THE METHOD OF RECOVERING IN A JOINT OPERATION ON THEIR RESPECTIVE ORES PRECIOUS METALS SUCH AS GOLD AND SILVER, AND BASE METALS SUCH AS LEAD, COPPER AND ZINC, WHICH COMPRISES SUBJECTING AN ORE OR TAILING OR CONCENTRATE OF SAID PRECIOUS METALS TO TREATMENT IN AN ALKALINE PULP WITH A CYANIDE AND WITH NATURALLY-OCCURRING LOWVOLATILE-MATTER COALS HAVING LOW ADSORPTIVE CAPACITY FOR PRECIOUS METALS, OF THE GROUP CONSISTING OF ANTHRACITE COAL, IMPURE GRAPHITIC COALS, CARBONACEOUS SCHISTS, COAL SHALES AND MIXTURES THEREOF, IN QUANTITY GREATER THAN 1% BY WEIGHT OF THE PRECIOUS METAL ORE AND SUFFICIENT BOTH TO ADSORB SUBSTANTIALLY ALL OF THE PRECIOUS METALS FROM SAID PULP AND TO SERVE AS A SUBSTANTIAL AND IMPORTANT PART OF THE FUEL AND REDUCING AGENT NEEDED IN THE REDUCTION OF THE BASE METAL ORE, REMOVING THE PRECIOUS-METAL-BEARING COAL FROM
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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |