US3281236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for copper refining
Assignee: Arthur D Little Inc
•
Filing: 1964-07-01
•
Granted: 1966-10-25
•
Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Herman P Meissner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:56
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF PRODUCING COPPER, CHARACTERIZED BY THE STEP OF INTRODUCING INTO A MOLTEN SYSTEM MAINTAINED AT A TEMPERATURE ABOVE THE MELTING POINT OF COPPER AND COMPRISING SLAG, MATTE AND COPPER, A FLUX, A SULFIDE ORE CONTAINING COPPER, AND AN OXYGEN-CONTAINING GAS, THE INTRODUCING OF SAID ORE AND GAS BEING ACCOMPLISHED BENEATH THE SURFACE OF SAID MOLTEN COPPER WHEREUPON REACTIONS OCCUR YIELDING METALLIC COPPER, SLAG AND GASEOUS BY-PRODUCTS, THE EXOTHERMIC REACTIONS PROVIDING AT LEAST A PORTION OF THE HEAT REQUIRED IN THE PROCESS; THE QUANTITY OF OXYGEN PRESENT IN SAID GAS BEING THAT WHICH IS SUFFICIENT TO CONVERT ALL OF THE SULFUR PRESENT TO SO2 ALL OF THE IRON PRESENT IN SAID ORE TO IRON OXIDES.
Claim 2
Independent Claim
116 words
A METHOD OF PRODUCING COPPER, CHARACTERIZED BY THE STEP OF INTRODUCING INTO A MOLTEN SYSTEM MAINTAINED AT A TEMPERATURE ABOVE THE MELTING POINT OF COPPER AND COMPRISING SLAG, MATTE AND COPPER, A FLUX, A SULFIDE ORE CONTAINING COPPER, AND AN OXYGEN-CONTAINING GAS, THE INTRODUCING OF SAID ORE AND GAS BEING ACCOMPLISHED BENEATH THE SURFACE OF SAID MOLTEN COPPER WHEREUPON REACTIONS OCCUR YIELDING METALLIC COPPER, SLAG AND GASEOUS BY-PRODUCTS, THE EXOTHERMIC REACTIONS PROVIDING AT LEAST A PORTION OF THE HEAT REQUIRED IN THE PROCESS; THE QUANTITY OF OXYGEN PRESENT IN SAID GAS BEING THAT WHICH IS SUFFICIENT TO CONVERT ALL OF THE SULFUR PRESENT TO SO2 ALL OF THE IRON PRESENT IN SAID ORE TO IRON OXIDES.
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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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |