US2811254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the beneficiation of phosphate ores
Assignee: International Minerals and Chemical Corp
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Filing: 1955-01-06
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Granted: 1957-10-29
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Expires: 1975-01-06
Abstract
No abstract record available.
Inventors
- 👤 Phillip E Mcgarry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:24
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCEES FOR THE FLOTATION OF PHOSPHATE ORE WHEREIN PHOSPHATE ORE IN A LIBERATED STATE IS SUBJECTED TO FLOTATION WITH CARBOXYL-CONTAINING NEGATIVE ION FLOTATION AGENT AND THE FLOTATION PRODUCT IS SUBJECTED TO A SECOND FLOTATION OPERATION EMPLOYING NITROGENOUS POSITIVE ION FLOATING AGENT, THE IMPROVEMENT COMPRISING AGING THE PHOSPHATE FLOTATION PRODUCT FROM THE NEGATIVE ION FLOTATION WHOLE STILL REAGENTIZED FOR AT LEAST ABOUT 12 HOURS, REMOVING NEGATIVE ION FLOTATION AGENT AFTER AGING, AND SUBJECTING THE AGED CONCENTRATE TO FLOTATION EMPLOYING NITROGENOUS POSITIVE ION FLOTATION AGENT TO RECOVER A PHOSPHATE CONCENTRATE.
Claim 2
Dependent Claim
90 words
IN A PROCEES FOR THE FLOTATION OF PHOSPHATE ORE WHEREIN PHOSPHATE ORE IN A LIBERATED STATE IS SUBJECTED TO FLOTATION WITH CARBOXYL-CONTAINING NEGATIVE ION FLOTATION AGENT AND THE FLOTATION PRODUCT IS SUBJECTED TO A SECOND FLOTATION OPERATION EMPLOYING NITROGENOUS POSITIVE ION FLOATING AGENT, THE IMPROVEMENT COMPRISING AGING THE PHOSPHATE FLOTATION PRODUCT FROM THE NEGATIVE ION FLOTATION WHOLE STILL REAGENTIZED FOR AT LEAST ABOUT 12 HOURS, REMOVING NEGATIVE ION FLOTATION AGENT AFTER AGING, AND SUBJECTING THE AGED CONCENTRATE TO FLOTATION EMPLOYING NITROGENOUS POSITIVE ION FLOTATION AGENT TO RECOVER A PHOSPHATE CONCENTRATE.
References Cited (Backward Citations)
US2409665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |