US2919982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pretreatment of ilmenite ore
Assignee: Quebec Iron & Titanium Corp
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Filing: 1955-11-25
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Granted: 1960-01-05
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Luther D Fetterolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
THE METHOD OF IMPROVING THE SMELTABILITY OF A HEMATITE-CONTAINING ILMENITE ORE WHICH COMPRISES HEATING A CHARGE CONSISTING OF THE ORE IN THE SUBSTANTIALLY COMPLETE ABSENCE OF SOLID CARBONACEOUS MATTER TO A TEMPERATURE OF ABOUT 1000-1200* C. FOR A PERIOD SUFFICIENTLY LONG TO CAUSE THE FORMATION OF A SOLID SOLUTION OF THE HEMATITE IN THE ILMENITE COMPONENT OF THE ORE CONFORMING SUBSTANTIALLY TO THE FORMULA XFEO.TIO2.YFE2O3 AND THUS CONCURRENTLY EFFECTING AN IMPROVED FLOWABILITY, AN INCREASED RATE OF REDUCIBILITY AND A LOWERED MELTING POINT OF THE RESULTING MODIFIED ORE, AND THEREAFTER SMELTING THE MODIFIED ORE.
Claim 2
Independent Claim
93 words
THE METHOD OF IMPROVING THE SMELTABILITY OF A HEMATITE-CONTAINING ILMENITE ORE WHICH COMPRISES HEATING A CHARGE CONSISTING OF THE ORE IN THE SUBSTANTIALLY COMPLETE ABSENCE OF SOLID CARBONACEOUS MATTER TO A TEMPERATURE OF ABOUT 1000-1200* C. FOR A PERIOD SUFFICIENTLY LONG TO CAUSE THE FORMATION OF A SOLID SOLUTION OF THE HEMATITE IN THE ILMENITE COMPONENT OF THE ORE CONFORMING SUBSTANTIALLY TO THE FORMULA XFEO.TIO2.YFE2O3 AND THUS CONCURRENTLY EFFECTING AN IMPROVED FLOWABILITY, AN INCREASED RATE OF REDUCIBILITY AND A LOWERED MELTING POINT OF THE RESULTING MODIFIED ORE, AND THEREAFTER SMELTING THE MODIFIED ORE.
Claim 3
Dependent Claim
31 words
A MODIFIED HEMATITE-CONTAINING ILMENITE ORE CHARACTERIZED BY A LOW SULPHIDE-SULPHUR CONTENT, ENHANCED MAGNETIC PROPERTIES, AND THE PRESSURE WITHIN THE ORE PARTICLES OF A SOLID SOLUTION OF XFEO.TIO2.YFE2O3 BETWEEN ILMENITE AND HEMATITE.
Claim 4
Dependent Claim
31 words
A MODIFIED HEMATITE-CONTAINING ILMENITE ORE CHARACTERIZED BY A LOW SULPHIDE-SULPHUR CONTENT, ENHANCED MAGNETIC PROPERTIES, AND THE PRESSURE WITHIN THE ORE PARTICLES OF A SOLID SOLUTION OF XFEO.TIO2.YFE2O3 BETWEEN ILMENITE AND HEMATITE.
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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |