Patent US2989397A successfully refreshed from Google Patents.
US2989397A
Expired / Lapsed
US
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Gaseous reduction of oxygencontaining copper
Assignee: Freeport Minerals Corp
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Filing: 1959-07-15
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Granted: 1961-06-20
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Expires: 1979-07-15
Abstract
No abstract record available.
Inventors
- 👤 Charles R Kuzell
- 👤 Morris G Fowler
- 👤 Klein Leonard
- 👤 Jr John H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:00
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/0028; C22B15/0052; C22B15/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS OF TREATING OXYGEN-BEARING MOLTEN COPPER IN A FURNACE WHICH COMPRISES AGITATING THE MOLTEN COPPER AND REDUCING ITS OXYGEN CONTENT BY INJECTING THEREIN A REDUCING GAS PRODUCED OUTSIDE OF THE FURNACE BY THE PARTIAL OXIDATION OF A HYDROCARBON WITH AN AMOUNT OF AIR WHICH IS ONLY SUFFICIENT TO OXIDIZE THE MAJOR PART OF THE CARBON OF THE HYDROCARBON TO CO WHILE PRODUCING SUBSTANTIAL QUANTITIES OF FREE HYDROGEN.
Claim 2
Dependent Claim
68 words
A PROCESS OF TREATING OXYGEN-BEARING MOLTEN COPPER IN A FURNACE WHICH COMPRISES AGITATING THE MOLTEN COPPER AND REDUCING ITS OXYGEN CONTENT BY INJECTING THEREIN A REDUCING GAS PRODUCED OUTSIDE OF THE FURNACE BY THE PARTIAL OXIDATION OF A HYDROCARBON WITH AN AMOUNT OF AIR WHICH IS ONLY SUFFICIENT TO OXIDIZE THE MAJOR PART OF THE CARBON OF THE HYDROCARBON TO CO WHILE PRODUCING SUBSTANTIAL QUANTITIES OF FREE HYDROGEN.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |