US3020205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sulfur from sulfates
Assignee: Callahan Mining Corp
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Filing: 1958-10-09
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Granted: 1962-02-06
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Expires: 1978-10-09
Abstract
No abstract record available.
Inventors
- 👤 Jensen Mead Le Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:31
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/501; C01B17/02; C01B17/04; C01B17/0404; C01B17/16; C01B17/164; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/17; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS OF RECOVERING SULFUR FRON SULFATE ORE CHOSEN FROM THE GROUP OF SOLUBLE AND SLIGHTLY SOLUBLE INORGANIC SULFATES COMPRISING THE STEPS OF, DISSOLVING THE SULFATE IN A WATER SOLUTION, SUBJECTING THE DISSOLVED SULFATE TO FERMENTATION BY ANAEROBIC BACTERIA OF THE GENUS DESULFOVIBRIO THEREBY CAUSING THE LIBERATION OF HYDROGEN SULFIDE GAS AND THEN OXIDIZING SAID HYDROGEN SULFIDE GAS TO PRODUCE SULFUR.
Claim 2
Dependent Claim
61 words
A PROCESS OF RECOVERING SULFUR FRON SULFATE ORE CHOSEN FROM THE GROUP OF SOLUBLE AND SLIGHTLY SOLUBLE INORGANIC SULFATES COMPRISING THE STEPS OF, DISSOLVING THE SULFATE IN A WATER SOLUTION, SUBJECTING THE DISSOLVED SULFATE TO FERMENTATION BY ANAEROBIC BACTERIA OF THE GENUS DESULFOVIBRIO THEREBY CAUSING THE LIBERATION OF HYDROGEN SULFIDE GAS AND THEN OXIDIZING SAID HYDROGEN SULFIDE GAS TO PRODUCE SULFUR.
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |