US2783141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating copper ore concentrates
Assignee: Dorr Oliver Inc
•
Filing: 1953-06-10
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Granted: 1957-02-26
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Expires: 1973-06-10
Abstract
No abstract record available.
Inventors
- 👤 Rupert M Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:45
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0002; C22B15/001; C22B15/0013; C22B15/0015; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE CONTINUOUS PROCESS FOR TREATING FINELY-DIVIDED COPPER BEARING SULFIDE SOLIDS TO YIELD A COPPER BEARING CALCINE AMENABLE TO LEACHING FOR RECOVERY OF ITS COPPER CONTENT, COMPRISING THE STEPS OF ESTABLISHING AN EVERCHANGING SINGLE-BED SINGLE-STAGE SOLIDS TREATMENT MASS BY SUPPLYING SUCH SOLIDS TO A TREATMENT ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE FROM ABOUT 550*C. TO ABOUT 750*C. WHILE DISCHARGING FROM SAID ZONE A PROPORTIONATE QUANTITY OF TREATED SOLIDS, MAINTAINING SAID MASS OF SOLIDS AS A TURBULENTLY MOBILIZED HOMOGENEOUD FLUIDIZED BED BY PASSING A STREAM OF FREE-OXYGEN BEARING GAS UPWARDLY THERETHROUGH AT SOLIDS FLUIDIZING VELOCITIES, SIMULTANEOUSLY FORMING IN SUCH FLUIDIZED BED BOTH WATERSOLUBLE COPPER COMPOUNDS AND WATER-INSOLUBLE ACIDSOLUBLE COPPER COMPOUNDS BY SUPPLYING SUCH FREE-OXYGEN IN AN AMOUNT AT LEAST EQUAL TO THE THEORETICAL OXYGEN REQUIRED TO SUBSTANTIALLY OXIDIZE SAID FEED SOLIDS TO CONVERT
Claim 2
Dependent Claim
133 words
THE CONTINUOUS PROCESS FOR TREATING FINELY-DIVIDED COPPER BEARING SULFIDE SOLIDS TO YIELD A COPPER BEARING CALCINE AMENABLE TO LEACHING FOR RECOVERY OF ITS COPPER CONTENT, COMPRISING THE STEPS OF ESTABLISHING AN EVERCHANGING SINGLE-BED SINGLE-STAGE SOLIDS TREATMENT MASS BY SUPPLYING SUCH SOLIDS TO A TREATMENT ZONE MAINTAINED AT A TEMPERATURE IN THE RANGE FROM ABOUT 550*C. TO ABOUT 750*C. WHILE DISCHARGING FROM SAID ZONE A PROPORTIONATE QUANTITY OF TREATED SOLIDS, MAINTAINING SAID MASS OF SOLIDS AS A TURBULENTLY MOBILIZED HOMOGENEOUD FLUIDIZED BED BY PASSING A STREAM OF FREE-OXYGEN BEARING GAS UPWARDLY THERETHROUGH AT SOLIDS FLUIDIZING VELOCITIES, SIMULTANEOUSLY FORMING IN SUCH FLUIDIZED BED BOTH WATERSOLUBLE COPPER COMPOUNDS AND WATER-INSOLUBLE ACIDSOLUBLE COPPER COMPOUNDS BY SUPPLYING SUCH FREE-OXYGEN IN AN AMOUNT AT LEAST EQUAL TO THE THEORETICAL OXYGEN REQUIRED TO SUBSTANTIALLY OXIDIZE SAID FEED SOLIDS TO CONVERT
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |