US2860046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of exothermically reducing oxidic ores
Assignee: Individual
•
Filing: 1957-05-01
•
Granted: 1958-11-11
•
Expires: 1977-05-01
Abstract
No abstract record available.
Inventors
- 👤 Edstrom John Olof
- 👤 Wiberg Ulf Orjan Helgosson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:09
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF REDUCING METAL OXIDIC ORES, WHICH COMPRISES TREATING A MIXTURE OF THE METAL OXIDIC ORE AND AN OXIDE, WHICH FORMS A DIFFICULTY DISSOCIATED HYDROXIDE, WITH HYDROGEN AS THE REDUCING GAS UNDER SUCH CONDITIONS OF REDUCTION PRESSURE, REDUCTION TEMPERATURE AND AMOUNT OF MATERIAL THAT THE PARTIAL PRESSURE OF STEAM IN THE GAS ATMOSPHERE FORMED DURING THE REDUCTION AT EQUILIBRIUM BETWEEN ORE OXIDE AND HYDROGEN GAS STEAM POSITIVELY EXCEEDS THE DISSOCIATION PRESSURE OF THE DIFFICULTLY DISSOCIATED HYDROXIDE AT THE REDUCTION TEMPERATURE, AND THAT THE LATTER IS KEPT WITHIN THE RANGE
Claim 2
Independent Claim
90 words
A METHOD OF REDUCING METAL OXIDIC ORES, WHICH COMPRISES TREATING A MIXTURE OF THE METAL OXIDIC ORE AND AN OXIDE, WHICH FORMS A DIFFICULTY DISSOCIATED HYDROXIDE, WITH HYDROGEN AS THE REDUCING GAS UNDER SUCH CONDITIONS OF REDUCTION PRESSURE, REDUCTION TEMPERATURE AND AMOUNT OF MATERIAL THAT THE PARTIAL PRESSURE OF STEAM IN THE GAS ATMOSPHERE FORMED DURING THE REDUCTION AT EQUILIBRIUM BETWEEN ORE OXIDE AND HYDROGEN GAS STEAM POSITIVELY EXCEEDS THE DISSOCIATION PRESSURE OF THE DIFFICULTLY DISSOCIATED HYDROXIDE AT THE REDUCTION TEMPERATURE, AND THAT THE LATTER IS KEPT WITHIN THE RANGE
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) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |