US3337048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for beneficiating clay by flotation
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1964-12-02
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Granted: 1967-08-22
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Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Mercade Venancio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:14
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/002; B03D1/004; B03D1/008; B03D2201/00; B03D2201/005; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR BRIGHTENING DISCOLORED CLAY WHICH COMPRISES PULPING THE CLAY WITH WATER, DISPERSING THE PULP BY ADDITION OF SODIUM SILICATE THERETON, AND SUBJECTING THE DISPERSED PULP TO FROTH FLOTATION IN THE PRESENCE OF AN ANIONIC FLOTATION REAGENT IN AN ALKALINE FLOTATION CIRCUIT, THE IMPROVEMENT WHICH COMPRISES INCORPORATING A WATER-SOLUBLE POLYVALENT METAL SALT INTO A DILUTE AQUEOUS SOLUTION OF THE SODIUM SILICATE CLAY DISPERSANT BEFORE THE SODIUM SILICATE IS INCORPORATED INTO THE CLAY PULP, THE AMOUNT OF POLYVALENT SALT BEING SUFFICIENT TO FORM A STABLE HYDROSOL WITH SAID DILUTE SODIUM SILICATE.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR BRIGHTENING DISCOLORED CLAY WHICH COMPRISES PULPING THE CLAY WITH WATER, DISPERSING THE PULP BY ADDITION OF SODIUM SILICATE THERETON, AND SUBJECTING THE DISPERSED PULP TO FROTH FLOTATION IN THE PRESENCE OF AN ANIONIC FLOTATION REAGENT IN AN ALKALINE FLOTATION CIRCUIT, THE IMPROVEMENT WHICH COMPRISES INCORPORATING A WATER-SOLUBLE POLYVALENT METAL SALT INTO A DILUTE AQUEOUS SOLUTION OF THE SODIUM SILICATE CLAY DISPERSANT BEFORE THE SODIUM SILICATE IS INCORPORATED INTO THE CLAY PULP, THE AMOUNT OF POLYVALENT SALT BEING SUFFICIENT TO FORM A STABLE HYDROSOL WITH SAID DILUTE SODIUM SILICATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |