US2927017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of metal values from complex ores
Assignee: Individual
•
Filing: 1957-09-11
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Granted: 1960-03-01
•
Expires: 1977-09-11
Abstract
No abstract record available.
Inventors
- 👤 Orrin F Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:52
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/04; C22B3/06; C22B3/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR THE RECOVERY OF METAL VALUES FROM COMPLEX ORES, WHICH INCLUDES THE STEPS OF: ROASTING SAID ORE AT A TEMPERATURE SUFFICIENTLY LOW TO PREVENT ANY SUBSTANTIAL FORMATION OF ACID INSOLUBLE COMPOUNDS OF SAID METAL VALUES, BUT SUFFICIENTLY HIGH TO CONVERT THOSE METAL VALUES, WHICH WOULD HAVE FORMED SAID ACID INSOLUBLE COMPOUNDS, TO ACID-SOLUBLE COMPOUNDS, REMOVING SAID ACID-SOLUBLE COMPOUNDS FROM SAID METAL VALUES REMAINING IN SAID ORE, AND ROASTING SAID REMAINING ORE RESIDUE CONTAINING SAID METAL VALUES AT A TEMPERATURE SUFFICIENTLY HIGH TO CONVERT SAID METAL VALUES TO ACID-SOLUBLE COMPOUNDS.
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE RECOVERY OF METAL VALUES FROM COMPLEX ORES, WHICH INCLUDES THE STEPS OF: ROASTING SAID ORE AT A TEMPERATURE SUFFICIENTLY LOW TO PREVENT ANY SUBSTANTIAL FORMATION OF ACID INSOLUBLE COMPOUNDS OF SAID METAL VALUES, BUT SUFFICIENTLY HIGH TO CONVERT THOSE METAL VALUES, WHICH WOULD HAVE FORMED SAID ACID INSOLUBLE COMPOUNDS, TO ACID-SOLUBLE COMPOUNDS, REMOVING SAID ACID-SOLUBLE COMPOUNDS FROM SAID METAL VALUES REMAINING IN SAID ORE, AND ROASTING SAID REMAINING ORE RESIDUE CONTAINING SAID METAL VALUES AT A TEMPERATURE SUFFICIENTLY HIGH TO CONVERT SAID METAL VALUES TO ACID-SOLUBLE COMPOUNDS.
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |