US2868618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of concentrating mineral values
Assignee: Individual
•
Filing: 1955-07-06
•
Granted: 1959-01-13
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Expires: 1975-07-06
Abstract
No abstract record available.
Inventors
- 👤 Fred N Oberg
- 👤 Baron Ira M Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:18
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/002; B03D2201/00; B03D2201/005; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE PROCESS OF RECOVERING MINERAL VALUES IN CONCENTRATED SLURRY FORM FROM LEACHED ZONE MATERIAL FROM THE FLORIDA PEBBLE PHOSPHATE FIELDS WHEREIN SAID ORE IS PULPED WITH WATER, THE STEPS COMPRISING SLURRYING THE LEACHED ZONE MATERIAL, ADDING TO THE SLURRY A DISPERSANT SELECTED FROM THE GROUP OF SODIUM SILICATE, SODIUM HEXAMETAPHOSPHATE AND MIXTURES THEREOF, CLASSIFYING THE DISPERSED SLURRY AND RECOVERING A MINUS 200 MESH SIZE FRACTION HAVING A SOLIDS CONTENT BETWEEN ABOUT 25% AND ABOUT .35% BY WEIGHT.
Claim 2
Dependent Claim
78 words
IN THE PROCESS OF RECOVERING MINERAL VALUES IN CONCENTRATED SLURRY FORM FROM LEACHED ZONE MATERIAL FROM THE FLORIDA PEBBLE PHOSPHATE FIELDS WHEREIN SAID ORE IS PULPED WITH WATER, THE STEPS COMPRISING SLURRYING THE LEACHED ZONE MATERIAL, ADDING TO THE SLURRY A DISPERSANT SELECTED FROM THE GROUP OF SODIUM SILICATE, SODIUM HEXAMETAPHOSPHATE AND MIXTURES THEREOF, CLASSIFYING THE DISPERSED SLURRY AND RECOVERING A MINUS 200 MESH SIZE FRACTION HAVING A SOLIDS CONTENT BETWEEN ABOUT 25% AND ABOUT .35% BY WEIGHT.
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |