US3298519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of minerals
Assignee: Hexion Inc
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Filing: 1963-10-23
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Granted: 1967-01-17
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/028; B03D1/14; B03D1/1443; B03D1/1456; B03D1/16; B03D1/24; B03D1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
FRACTIONATING FLOTATION PROCESS FOR SEPARATING A MIXTURE OF RELATIVELY FLOATABLE AND RELATIVELY NON-FLOATABLE PARTICULATE MATERIAL WHICH COMPRISES: ESTABLISHING A VERTICAL COLUMN OF LIQUID AT LEAST ABOUT SIX FEET IN HEIGHT; AERATING THE COLUMN OF LIQUID; INTRODUCING THE MIXTURE OF PARTICLES INTO SAID AERATED COLUMN OF LIQUID AT LEAST ABOUT TWO FEET BELOW THE SURFACE OF THE LIQUID COLUMN, THERE BEING NO SIGNIFICANT DECREASE IN THE HORIZONTAL CROSS-SECTIONAL AREA OF THE COLUMN OF LIQUID FROM ABOVE THE POINT AT WHICH THE MIXTURE OF PATICULATE MATERIAL IS INTRODUCED INTO THE COLUMN OF LIQUID TO BELOW THE SURFACE OF THE LIQUID COLUMN; INTRODUCING A SUBSTANTIAL PORTION OF THE AERATING AIR INTO THE COLUMN BELOW THE POINT AT WHICH THE MIXTURE OF PARTICULATE MATERIAL IS INTRODUCED THEREINTO; WITHDRAWING A HEAVY FRACTION PREDOMINANTLY COMPRISING RELATIVELY NON-FLOATABLE PARTICLES OF THE FEED MATERIAL FROM THE LOWER PORTION OF THE LIQUID COLUMN; REMOVING A LIGHT FRACTION PREDOMINANTLY COMPRISING RELATIVELY FLOATABLE PARTICLLES OF THE FEED MATERIAL FROM THE TOP OF THE AERATED COLUMN; AND CONTROLLING THE RATE OF INTRODUCTION OF FEED MATERIAL AND LIQUID INTO THE LIQUID COLUMN AND THE REMOVAL OF LIQUID AND SAID HEAVY AND LIGHT FRACTIONS FROM SAID COLUMN SO THAT THE NET RATE OF UPWARD FLOW OF LIQUID IN
Claim 2
Dependent Claim
204 words
FRACTIONATING FLOTATION PROCESS FOR SEPARATING A MIXTURE OF RELATIVELY FLOATABLE AND RELATIVELY NON-FLOATABLE PARTICULATE MATERIAL WHICH COMPRISES: ESTABLISHING A VERTICAL COLUMN OF LIQUID AT LEAST ABOUT SIX FEET IN HEIGHT; AERATING THE COLUMN OF LIQUID; INTRODUCING THE MIXTURE OF PARTICLES INTO SAID AERATED COLUMN OF LIQUID AT LEAST ABOUT TWO FEET BELOW THE SURFACE OF THE LIQUID COLUMN, THERE BEING NO SIGNIFICANT DECREASE IN THE HORIZONTAL CROSS-SECTIONAL AREA OF THE COLUMN OF LIQUID FROM ABOVE THE POINT AT WHICH THE MIXTURE OF PATICULATE MATERIAL IS INTRODUCED INTO THE COLUMN OF LIQUID TO BELOW THE SURFACE OF THE LIQUID COLUMN; INTRODUCING A SUBSTANTIAL PORTION OF THE AERATING AIR INTO THE COLUMN BELOW THE POINT AT WHICH THE MIXTURE OF PARTICULATE MATERIAL IS INTRODUCED THEREINTO; WITHDRAWING A HEAVY FRACTION PREDOMINANTLY COMPRISING RELATIVELY NON-FLOATABLE PARTICLES OF THE FEED MATERIAL FROM THE LOWER PORTION OF THE LIQUID COLUMN; REMOVING A LIGHT FRACTION PREDOMINANTLY COMPRISING RELATIVELY FLOATABLE PARTICLLES OF THE FEED MATERIAL FROM THE TOP OF THE AERATED COLUMN; AND CONTROLLING THE RATE OF INTRODUCTION OF FEED MATERIAL AND LIQUID INTO THE LIQUID COLUMN AND THE REMOVAL OF LIQUID AND SAID HEAVY AND LIGHT FRACTIONS FROM SAID COLUMN SO THAT THE NET RATE OF UPWARD FLOW OF LIQUID IN
References Cited (Backward Citations)
US1167835A
Cited
US3012671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |