US2762703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for treating materials containing nickel and iron
Assignee: Bethlehem Steel Corp
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Filing: 1953-12-23
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Granted: 1956-09-11
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Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Edgar B Mancke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:26
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415; C22B23/0438; C22B3/00; C22B3/04; C22B3/06; C22B3/065; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS OF TREATING IRON ORE CONTAINING NICKEL, COMPRISING THE STEPS OF MIXING THE MATERIAL WITH AN AQUEOUS SOLUTION OF NITRIC ACID IN AN AMOUNT AT LEAST SUFFICIENT TO COMBINE WITH THE MAJOR PORTION OF THE IRON AND ALSO COMBINE WITH THE NON-FERROUS CONSTITUENTS OF THE MATERIAL CAPABLE OF BEING DISSOLVED BY NITRIC ACID, MAINTAINING THE ACID AND MATERIAL IN CONTACT A SUFFICIENT PERIOD OF TIME TO DISSOLVE THE MAJOR PORTION OF THE IRON AND NICKEL OF THE MATERIAL, SEPARATING THE SOLUTION FROM THE UNDISSOLVED PORTION OF THE MATERIAL, AND AUTOCLAVING THE SOLUTION AT A TEMPERATURE BETWEEN 365* F. AND 650* F. TO OBTAIN A SOLID PHASE CONTAINING IRON AND A SOLUTION CONTAINING THE MAJOR PORTION OF THE NICKEL OF THE MATERIAL.
Claim 2
Dependent Claim
122 words
A PROCESS OF TREATING IRON ORE CONTAINING NICKEL, COMPRISING THE STEPS OF MIXING THE MATERIAL WITH AN AQUEOUS SOLUTION OF NITRIC ACID IN AN AMOUNT AT LEAST SUFFICIENT TO COMBINE WITH THE MAJOR PORTION OF THE IRON AND ALSO COMBINE WITH THE NON-FERROUS CONSTITUENTS OF THE MATERIAL CAPABLE OF BEING DISSOLVED BY NITRIC ACID, MAINTAINING THE ACID AND MATERIAL IN CONTACT A SUFFICIENT PERIOD OF TIME TO DISSOLVE THE MAJOR PORTION OF THE IRON AND NICKEL OF THE MATERIAL, SEPARATING THE SOLUTION FROM THE UNDISSOLVED PORTION OF THE MATERIAL, AND AUTOCLAVING THE SOLUTION AT A TEMPERATURE BETWEEN 365* F. AND 650* F. TO OBTAIN A SOLID PHASE CONTAINING IRON AND A SOLUTION CONTAINING THE MAJOR PORTION OF THE NICKEL OF THE MATERIAL.
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |