US2885078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of mica from silt deposits
Assignee: International Minerals and Chemical Corp
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Filing: 1956-04-12
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Granted: 1959-05-05
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Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Fenske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:39
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/006; B03D1/008; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR BENEFICIATING MICA FOUND IN SILT DEPOSITS WHICH COMPRISES SEPARATING A FRACTION IN WHICH MICA IS PRESENT IN SUBSTANTIAL AMOUNT, SAID FRACTION HAVING A PARTICLE SIZE IN THE RANGE BETWEEN ABOUT 4 AND ABOUT 80 MESH, SUBJECTING THE FRACTION TO FLOTATION WITH HYDROCARBON AND FROTHING AGENTS, SAID HYDROCARBON AGENT BEING SELECTED FROM THE GROUP CONSISTING OF GAS OIL, FUEL OIL, AND KEROSENE, SUBJECTING THE UNDERFLOW PRODUCT TO CATIONIC REAGENT FLOTATION AND RECOVERING A MICA CONCENTRATE AS OVERFLOW PRODUCT FROM THE FLOTATION APPARATUS.
Claim 2
Dependent Claim
84 words
A PROCESS FOR BENEFICIATING MICA FOUND IN SILT DEPOSITS WHICH COMPRISES SEPARATING A FRACTION IN WHICH MICA IS PRESENT IN SUBSTANTIAL AMOUNT, SAID FRACTION HAVING A PARTICLE SIZE IN THE RANGE BETWEEN ABOUT 4 AND ABOUT 80 MESH, SUBJECTING THE FRACTION TO FLOTATION WITH HYDROCARBON AND FROTHING AGENTS, SAID HYDROCARBON AGENT BEING SELECTED FROM THE GROUP CONSISTING OF GAS OIL, FUEL OIL, AND KEROSENE, SUBJECTING THE UNDERFLOW PRODUCT TO CATIONIC REAGENT FLOTATION AND RECOVERING A MICA CONCENTRATE AS OVERFLOW PRODUCT FROM THE FLOTATION APPARATUS.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |