US3331504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of potash ores
Assignee: Dow Chemical Co
•
Filing: 1962-05-18
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Granted: 1967-07-18
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Wilbert L O'connell
- 👤 Elmer C Tveter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A SINK-FLOAT PROCESS FOR THE BENEFICIATION OF CLAY-CONTAINING SYLVITE ORES COMPRISING, IMMERSING SAID ORE OF THE DESIRED PARTICLE SIZE IN AN ORGANIC, SUBSTANTIALLY NON-POLAR SEPARATING LIQUID CONSISTING ESSENTIALLY OF AT LEAST ONE LIQUID, ORGANIC, SUBSTANTIALLY NON-POLAR COMPOUND, SAID SEPARATING LIQUID HAVING A SPECIFIC GRAVITY OF FROM 2.00 TO 2.15, WHEREBY POTASSIUM CHLORIDE IS FLOATED AWAY FROM THE CLAY AND SODIUM CHLORIDE IN SAID SYLVITE ORE.
Claim 2
Dependent Claim
65 words
A SINK-FLOAT PROCESS FOR THE BENEFICIATION OF CLAY-CONTAINING SYLVITE ORES COMPRISING, IMMERSING SAID ORE OF THE DESIRED PARTICLE SIZE IN AN ORGANIC, SUBSTANTIALLY NON-POLAR SEPARATING LIQUID CONSISTING ESSENTIALLY OF AT LEAST ONE LIQUID, ORGANIC, SUBSTANTIALLY NON-POLAR COMPOUND, SAID SEPARATING LIQUID HAVING A SPECIFIC GRAVITY OF FROM 2.00 TO 2.15, WHEREBY POTASSIUM CHLORIDE IS FLOATED AWAY FROM THE CLAY AND SODIUM CHLORIDE IN SAID SYLVITE ORE.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |