Patent US2766883A successfully refreshed from Google Patents.
US2766883A
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Process of deoiling phosphate concentrate by means of finely divided solids
Assignee: Virginia Carolina Chemical Corp
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Filing: 1954-12-30
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Granted: 1956-10-16
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Chapman Otto Charles
- 👤 Dean Arnold Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:29
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/006; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A PROCESS FOR THE BENEFICATION OF PHOSPHATE ORE CONTAINING SILICIOUS IMPURITY INVOLVING THE STEPS IN SEQUENCE OF ANIONIC FLOTATION, DEOILING THE RESULTING CONCENTRATE AND CATIONIC FLOTATION OF THE DEOILED CONCENTRATE, THE IMPROVEMENT WHICH CONISTS IN DEOILING THE CONCENTRATE PRODUCED BY THE ANIONIC FLOTAION BY MIXING IT WITH A FINELY DIVIDED SOLID WATER-INSOLUBLE MATERIAL IN THE PRESENCE OF WATER AND WASHING THE RSULTING MIXTURE WITH WATER.
Claim 2
Dependent Claim
66 words
IN A PROCESS FOR THE BENEFICATION OF PHOSPHATE ORE CONTAINING SILICIOUS IMPURITY INVOLVING THE STEPS IN SEQUENCE OF ANIONIC FLOTATION, DEOILING THE RESULTING CONCENTRATE AND CATIONIC FLOTATION OF THE DEOILED CONCENTRATE, THE IMPROVEMENT WHICH CONISTS IN DEOILING THE CONCENTRATE PRODUCED BY THE ANIONIC FLOTAION BY MIXING IT WITH A FINELY DIVIDED SOLID WATER-INSOLUBLE MATERIAL IN THE PRESENCE OF WATER AND WASHING THE RSULTING MIXTURE WITH WATER.
References Cited (Backward Citations)
US1261810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |