US2723902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the treatment of iron ore
Assignee: United Steel Companies Ltd
•
Filing: 1950-07-18
•
Granted: 1955-11-15
•
Expires: 1970-07-18
Abstract
No abstract record available.
Inventors
- 👤 Reeve Lewis
- 👤 Wells Geoffrey Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:35
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR OBTAINING SUBSTANTIALLY PURE FERRIC CHLORIDE FROM IRON ORE CONTAINING FERRIC OXIDE BUT SUBSTANTIALLY FREE FROM TITANIA WHICH COMPRISES FIRST TREATING THE ORE WITH HYDROCHLORIC ACID GAS AT A TEMPERATURE HIGH ENOUGH TO VAPORIZE WATER RESULTING FROM SUCH TREATMENT BUT NOT EXCEEDING 200* C., THEREBY PRODUCING FERRIC CHLORIDE AND WATER VAPOR, SEPARATING FROM THE ORE A SUBSTANTIALL PROPORTION OF SAID WATER VAPOR WITH NOT MORE THAN A SMALL AMOUNT OF FERRIC CHLORIDE, THEN TREATING THE ORE WITH FURTHER HYDROCHLORIC ACID GAS AT A TEMPERATURE BETWEEN 200 AND ABOUT 400*C. TO VOLATILIZE BOTH THE FERRIC CHLORIDE ALREADY PRESENT AND ADDITIONAL FERRIC CHLORIDE FORMED FROM THE ORE, AND REMOVING THE VOLATILIZED SUBSTANTIALLY PURE FERRIC CHLORIDE FROM THE SOLID RESIDUE.
Claim 2
Dependent Claim
119 words
A PROCESS FOR OBTAINING SUBSTANTIALLY PURE FERRIC CHLORIDE FROM IRON ORE CONTAINING FERRIC OXIDE BUT SUBSTANTIALLY FREE FROM TITANIA WHICH COMPRISES FIRST TREATING THE ORE WITH HYDROCHLORIC ACID GAS AT A TEMPERATURE HIGH ENOUGH TO VAPORIZE WATER RESULTING FROM SUCH TREATMENT BUT NOT EXCEEDING 200* C., THEREBY PRODUCING FERRIC CHLORIDE AND WATER VAPOR, SEPARATING FROM THE ORE A SUBSTANTIALL PROPORTION OF SAID WATER VAPOR WITH NOT MORE THAN A SMALL AMOUNT OF FERRIC CHLORIDE, THEN TREATING THE ORE WITH FURTHER HYDROCHLORIC ACID GAS AT A TEMPERATURE BETWEEN 200 AND ABOUT 400*C. TO VOLATILIZE BOTH THE FERRIC CHLORIDE ALREADY PRESENT AND ADDITIONAL FERRIC CHLORIDE FORMED FROM THE ORE, AND REMOVING THE VOLATILIZED SUBSTANTIALLY PURE FERRIC CHLORIDE FROM THE SOLID RESIDUE.
References Cited (Backward Citations)
US1992685A
Cited
US1916853A
Cited
US1917789A
Cited
US1967235A
Cited
US2036664A
Cited
US2176242A
Cited
US2070161A
Cited
US2291206A
Cited
US2378675A
Cited
US2436870A
Cited
US2471844A
Cited
US2621118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |