US2569680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation process for whitening clay
Assignee: Edgar Brothers Co
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Filing: 1949-02-04
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Granted: 1951-10-02
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Expires: 1969-02-04
Abstract
No abstract record available.
Inventors
- 👤 Leek Thomas Gostage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:09
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/14; B03D1/1443; B03D1/1462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF WHITENING CLAY COMPRISING ADDING A DEFLUOCCULATING AGENT TO THE CLAY TO DEFLOCCULATE IT AND SUBJECTING THE CLAY WHILE IN DEFLOCCULATED CONDITION TO FLOTATION IN THE PRESENCE OF AN ADDED FLOTATION AGENT SELECTIVE TO THE IMPURITIES IN THE CLAY WHICH ARE MECHANICALLY SEPARABLE THEREFROM WHILE PASSING AIR UPWARDLY THROUGH THE CLAY AND FORMING A FROTH WHEREBY SUCH IMPURITIES ARE FLOTATED OFF IN THE FROTH AND THE CLAY FROM WHICH THE IMPURITIES HAVE BEEN REMOVED IS DELIVERED IN THE TAILINGS.
Claim 2
Independent Claim
81 words
A METHOD OF WHITENING CLAY COMPRISING ADDING A DEFLUOCCULATING AGENT TO THE CLAY TO DEFLOCCULATE IT AND SUBJECTING THE CLAY WHILE IN DEFLOCCULATED CONDITION TO FLOTATION IN THE PRESENCE OF AN ADDED FLOTATION AGENT SELECTIVE TO THE IMPURITIES IN THE CLAY WHICH ARE MECHANICALLY SEPARABLE THEREFROM WHILE PASSING AIR UPWARDLY THROUGH THE CLAY AND FORMING A FROTH WHEREBY SUCH IMPURITIES ARE FLOTATED OFF IN THE FROTH AND THE CLAY FROM WHICH THE IMPURITIES HAVE BEEN REMOVED IS DELIVERED IN THE TAILINGS.
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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |