US2634204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of manganese
Assignee: Sylvester and Co
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Filing: 1951-01-25
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Granted: 1953-04-07
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Expires: 1971-01-25
Abstract
No abstract record available.
Inventors
- 👤 Robert A Schoenlaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:39
CPC Classifications
C; C22; C22B; C22B47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF REDUCING SUBSTANTIALLY REFRACTORY MANGANESE CONTAINING ORES WHICH HAVE A SILICA CONTENT OF NOT MORE THAN ABOUT 6%, WHICH COMPRISES FIRST ADJUSTING THE CALCIUM, SILICON AND ALUMINUM CONTENT OF THE ORE TO PROVIDE THE THEORETICAL AMOUNTS OF THESE ELEMENTS NECESSARY TO FORM IN A SMELT OF THE ORE A DICALCIUM SILICATE AND A CALCIUM ALUMINATE IN THE PROPORTIONS OF FROM ONE TO FOUR PARTS OF CALCIUM ALUMINATE PER PART OF DICALCIUM SILICATE, AND THEN SMELTING AT BETWEEN 2600* F. AND 3200* F.
Claim 2
Dependent Claim
84 words
THE PROCESS OF REDUCING SUBSTANTIALLY REFRACTORY MANGANESE CONTAINING ORES WHICH HAVE A SILICA CONTENT OF NOT MORE THAN ABOUT 6%, WHICH COMPRISES FIRST ADJUSTING THE CALCIUM, SILICON AND ALUMINUM CONTENT OF THE ORE TO PROVIDE THE THEORETICAL AMOUNTS OF THESE ELEMENTS NECESSARY TO FORM IN A SMELT OF THE ORE A DICALCIUM SILICATE AND A CALCIUM ALUMINATE IN THE PROPORTIONS OF FROM ONE TO FOUR PARTS OF CALCIUM ALUMINATE PER PART OF DICALCIUM SILICATE, AND THEN SMELTING AT BETWEEN 2600* F. AND 3200* F.
References Cited (Backward Citations)
GB454165A
Cited
US2265866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |