Patent US2563447A successfully refreshed from Google Patents.
US2563447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of hematite
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
•
Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:11
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF CONCENTRATING IRON ORES BY FLOTATION WHICH COMPRISES FORMING A FLOTATION PULP OF THE DESIRED DENSITY, INCORPORATING WITH THE PULP A PROPORTION OF A FLOTATION REAGENT COMPRISING A MINERAL OIL IN EMULSION IN A SOAP SOLUTION, ADDING TO THE MIXTURE A PROPORTION OF A POOR SOAP HAVING APPROXIMATELY THE SAME FATTY RADICALS AS COTTONSEED FOOTS SOAP AND THEREAFTER SUBJECTING THE PULP TO FROTH FLOTATION.
Claim 2
Independent Claim
66 words
THE METHOD OF CONCENTRATING IRON ORES BY FLOTATION WHICH COMPRISES FORMING A FLOTATION PULP OF THE DESIRED DENSITY, INCORPORATING WITH THE PULP A PROPORTION OF A FLOTATION REAGENT COMPRISING A MINERAL OIL IN EMULSION IN A SOAP SOLUTION, ADDING TO THE MIXTURE A PROPORTION OF A POOR SOAP HAVING APPROXIMATELY THE SAME FATTY RADICALS AS COTTONSEED FOOTS SOAP AND THEREAFTER SUBJECTING THE PULP TO FROTH FLOTATION.
References Cited (Backward Citations)
US1939119A
Cited
US2014406A
Cited
US2014405A
Cited
US2163702A
Cited
US2163701A
Cited
US2164063A
Cited
US2410376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |