US3302785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate matrix beneficiation process
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1963-10-14
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Granted: 1967-02-07
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Expires: 1983-10-14
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:18
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; B03D1/001; B03D1/002; B03D1/004; B03D1/006; B03D1/008; B03D2201/00; B03D2201/005; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD FOR BENEFICIATING PHOSPHATE MATRIX CONTAINIGN GANGUE INCLUDING SAND AND CLAY AND ALSO CONTAINING FRIABLE AGGLOMERATES OF SLIMED PHOSPHATE MINERALS WHICH WOULD NORMALLY REPORT IN WASHER SLIMES WHEN SAID MATRIX IS BLUNGED AND THEN DESLIMED TO ELIMATE CLAY, SAID METHOD COMPRISING: FORMING A BLUNGED AQUEOUS PULP OF SAID MATRIX CONTAINING A DISPERSING AGENT, WITHOUT DESLIMING SAID PULP, SUBJECTING IT TO FROTH FLOTATION WITH AN ANIONIC COLLECTOR REAGENT FOR SELECTIVELY FLOATING SLIMED PHOSPHATE MINERALS, THEREBY PRODUCING A FROTH PRODUCT WHICH IS A CONCENTRATE OF SLIMED PHOSPHATE MINERALS AND A TAILING WHICH IS A MIXTURE OF CLAY SLIMES, COARSE PHOSPHATE MINERALS AND SAND, DESLIMING SAID TAILING, AND RECOVERIG SAID FROTH PRODUCT AND SAID DESLIMED TAILING.
Claim 2
Independent Claim
114 words
A METHOD FOR BENEFICIATING PHOSPHATE MATRIX CONTAINIGN GANGUE INCLUDING SAND AND CLAY AND ALSO CONTAINING FRIABLE AGGLOMERATES OF SLIMED PHOSPHATE MINERALS WHICH WOULD NORMALLY REPORT IN WASHER SLIMES WHEN SAID MATRIX IS BLUNGED AND THEN DESLIMED TO ELIMATE CLAY, SAID METHOD COMPRISING: FORMING A BLUNGED AQUEOUS PULP OF SAID MATRIX CONTAINING A DISPERSING AGENT, WITHOUT DESLIMING SAID PULP, SUBJECTING IT TO FROTH FLOTATION WITH AN ANIONIC COLLECTOR REAGENT FOR SELECTIVELY FLOATING SLIMED PHOSPHATE MINERALS, THEREBY PRODUCING A FROTH PRODUCT WHICH IS A CONCENTRATE OF SLIMED PHOSPHATE MINERALS AND A TAILING WHICH IS A MIXTURE OF CLAY SLIMES, COARSE PHOSPHATE MINERALS AND SAND, DESLIMING SAID TAILING, AND RECOVERIG SAID FROTH PRODUCT AND SAID DESLIMED TAILING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |