US2596580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating arsenical gold ores
Assignee: Dorr Co
•
Filing: 1950-01-05
•
Granted: 1952-05-13
•
Expires: 1970-01-05
Abstract
No abstract record available.
Inventors
- 👤 James B Mckay
- 👤 James V Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10; C22B11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE CONTINUOUS PROCESS FOR ROASTING FINELY DIVIDED GOLD BEARING ARSENOPYRITE ORE SOLIDS TO CONDITION THEM FOR CYANIDE LEACHING, COMPRISING ESTABLISHING AND MAINTAINING AN EVER-CHANGING BED OF SUCH SOLIDS IN AN ENCLOSED CHAMBER BY FEEDING SUCH SOLIDS THERETO AND DISCHARGING THEM THEREFROM, MAINTAINING SOLIDS OF THE BED AT ROASTING TEMPERATURES, MAINTAINING THE BED AS A TURBULENTLY MOBILIZED FLUIDIZED BED BY PASSING THERETHROUGH AT FLUIDIZING VELOCITIES AN UPRISING STREAM OF FREE-OXYGEN BEARING GAS, DISCHARGING GASES FROM THE BED AND FROM THE CHAMBER, AND CONTROLLING ROASTING CONDITIONS WITHIN THE BED BY REGULATING THE QUANTITY OF FREE-OXYGEN SUPPLIED TO THE BED TO BE AN AMOUNT SUFFICIENT TO REACT SUBSTANTIALLY ALL OF THE ARSENOPYRITE SOLIDS ACCORDING TO THE EQUATION
Claim 2
Dependent Claim
114 words
THE CONTINUOUS PROCESS FOR ROASTING FINELY DIVIDED GOLD BEARING ARSENOPYRITE ORE SOLIDS TO CONDITION THEM FOR CYANIDE LEACHING, COMPRISING ESTABLISHING AND MAINTAINING AN EVER-CHANGING BED OF SUCH SOLIDS IN AN ENCLOSED CHAMBER BY FEEDING SUCH SOLIDS THERETO AND DISCHARGING THEM THEREFROM, MAINTAINING SOLIDS OF THE BED AT ROASTING TEMPERATURES, MAINTAINING THE BED AS A TURBULENTLY MOBILIZED FLUIDIZED BED BY PASSING THERETHROUGH AT FLUIDIZING VELOCITIES AN UPRISING STREAM OF FREE-OXYGEN BEARING GAS, DISCHARGING GASES FROM THE BED AND FROM THE CHAMBER, AND CONTROLLING ROASTING CONDITIONS WITHIN THE BED BY REGULATING THE QUANTITY OF FREE-OXYGEN SUPPLIED TO THE BED TO BE AN AMOUNT SUFFICIENT TO REACT SUBSTANTIALLY ALL OF THE ARSENOPYRITE SOLIDS ACCORDING TO THE EQUATION
References Cited (Backward Citations)
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Cited
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US1887452A
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US2128107A
Cited
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US2444990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |