US2732293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recoverevg manganese from
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:55
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/04; C21; C21C; C21C5/00; C21C5/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR RECOVERING MANGANESE FROM BASIC OPEN-HEARTH SLAGS CONTAINING IRON AND MANGANESE OXIDES AND ALSO CONTAINING PHOSPHORUS AND SULPHUR AS IMPURITIES, WHICH COMPRISES CONVERTING THE BASIC SLAG TO AN ACID SLAG, SUBJECTING THE ACID SLAG TO PARTIAL REDUCTION, REGULATING THE AMOUNT OF REDUCTION OF ELIMINATE FROM THE SLAG THE GREATER PART OF THE PHOSPHORUS AND SULPHUR WHILE RETAINING THE GREATER PART OF THE MANGANESE IN THE SLAG IN THE FORM OF OXIDE, SEPARATING THE SLAG FROM THE METAL BATH RESULTING FROM SAID PARTIAL REDUCTION OPERATION, AND REUSING THE THUS PURIFIED SLAG AS A RAW MATERIAL FOR THE RECOVERY OF MANGANSES.
Claim 2
Dependent Claim
101 words
A PROCESS FOR RECOVERING MANGANESE FROM BASIC OPEN-HEARTH SLAGS CONTAINING IRON AND MANGANESE OXIDES AND ALSO CONTAINING PHOSPHORUS AND SULPHUR AS IMPURITIES, WHICH COMPRISES CONVERTING THE BASIC SLAG TO AN ACID SLAG, SUBJECTING THE ACID SLAG TO PARTIAL REDUCTION, REGULATING THE AMOUNT OF REDUCTION OF ELIMINATE FROM THE SLAG THE GREATER PART OF THE PHOSPHORUS AND SULPHUR WHILE RETAINING THE GREATER PART OF THE MANGANESE IN THE SLAG IN THE FORM OF OXIDE, SEPARATING THE SLAG FROM THE METAL BATH RESULTING FROM SAID PARTIAL REDUCTION OPERATION, AND REUSING THE THUS PURIFIED SLAG AS A RAW MATERIAL FOR THE RECOVERY OF MANGANSES.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |