US3224870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of ilmenite and similar ores
Assignee: Hydrocarbon Research Inc
•
Filing: 1962-10-01
•
Granted: 1965-12-21
•
Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Johnson
- 👤 Volk William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:04
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR THE SEPARATE RECOVERY OF HIGH PURITY IRON AND SUBSTANTIALLY IRON FREE NON-FERROUS OXIDES SELECTED FROM THE CLASS CONSISTING OF TITANIUM OXIDES AND CHROME OXIDES FROM ORES SELECTED FROM THE CLASS CONSISTING OF ILMENITE AND CHROMIFEROUS ORES AND CONCENTRATES OF THE SAME WHICH COMPRISES FORMING IN A CONTACT ZONE A BED OF ORE OF A FINENESS TO PASS A 20 MESH SCREEN, PASSING A HIGH PURITY HYDROGEN GAS UPWARDLY THROUGH THE BED OR ORE AT A VELOCITY TO CAUSE MOBILITY OF THE BED, MAINTAINING SAID CONTACT ZONE UNDER A TEMPERATURE IN THE RANGE OF 1100*F. TO 1400*F. AND A PRESSURE IN THE RANGE OF 100-400 P.S.I.G.; AND FOR A TIME SUFFICIENT TO ACCOMPOLISH AT LEAST 60% REDUCTION OF THE IRON OXIDE IN SAID ORE WITHOUT SUBSTANTIALLY CHANGING THE CHARACTERISTICS OF THE NON-FERROUS OXIDE, AND THEREAFTER SEPARATING THE UNREDUCED NON-FERROUS OXIDES FROM THE REDUCED IRON.
Claim 2
Dependent Claim
146 words
A PROCESS FOR THE SEPARATE RECOVERY OF HIGH PURITY IRON AND SUBSTANTIALLY IRON FREE NON-FERROUS OXIDES SELECTED FROM THE CLASS CONSISTING OF TITANIUM OXIDES AND CHROME OXIDES FROM ORES SELECTED FROM THE CLASS CONSISTING OF ILMENITE AND CHROMIFEROUS ORES AND CONCENTRATES OF THE SAME WHICH COMPRISES FORMING IN A CONTACT ZONE A BED OF ORE OF A FINENESS TO PASS A 20 MESH SCREEN, PASSING A HIGH PURITY HYDROGEN GAS UPWARDLY THROUGH THE BED OR ORE AT A VELOCITY TO CAUSE MOBILITY OF THE BED, MAINTAINING SAID CONTACT ZONE UNDER A TEMPERATURE IN THE RANGE OF 1100*F. TO 1400*F. AND A PRESSURE IN THE RANGE OF 100-400 P.S.I.G.; AND FOR A TIME SUFFICIENT TO ACCOMPOLISH AT LEAST 60% REDUCTION OF THE IRON OXIDE IN SAID ORE WITHOUT SUBSTANTIALLY CHANGING THE CHARACTERISTICS OF THE NON-FERROUS OXIDE, AND THEREAFTER SEPARATING THE UNREDUCED NON-FERROUS OXIDES FROM THE REDUCED IRON.
References Cited (Backward Citations)
US2638414A
Cited
US2900246A
Cited
US3022156A
Cited
US2876091A
Cited
US2912320A
Cited
US2996373A
Cited
US3053648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |