US2944666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore beneficiation
Assignee: MA Hanna Co
•
Filing: 1956-04-04
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Granted: 1960-07-12
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Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 Bunge Fred Henry
- 👤 Pocrnich Ivan George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/006; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR THE RECOVERY OF IRON-OXYGEN COMPOUNDS FROM IRON BEARING ORES WHICH COMPRISES GRINDING SAID ORE TO FLOTATION SIZE IN THE PRESENCE OF 1 TO 5 POUNDS OF A FATTY ACID MATERIAL PER TON OF SOLIDS AND 1 TO 20 POUNDS OF A HYDROCARBON OIL PER TON SOLIDS, AND SUBJECTING THE ENTIRE MASS WHICH HAS THUS BEEN GROUND TO FROTH FLOTATION.
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE RECOVERY OF IRON-OXYGEN COMPOUNDS FROM IRON BEARING ORES WHICH COMPRISES GRINDING SAID ORE TO FLOTATION SIZE IN THE PRESENCE OF 1 TO 5 POUNDS OF A FATTY ACID MATERIAL PER TON OF SOLIDS AND 1 TO 20 POUNDS OF A HYDROCARBON OIL PER TON SOLIDS, AND SUBJECTING THE ENTIRE MASS WHICH HAS THUS BEEN GROUND TO FROTH FLOTATION.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |