US2569672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of slimes from sylvinite ore with hydroxyethyl cellulose
Assignee: International Minerals and Chemical Corp
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Filing: 1950-04-06
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Granted: 1951-10-02
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Expires: 1970-04-06
Abstract
No abstract record available.
Inventors
- 👤 Richard I Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:38
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; B03D1/001; B03D1/004; B03D1/008; B03D1/01; B03D1/08; B03D1/085; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS OF DESLIMING SYLVINITE ORE WHICH COMPRISES PREPARING A PULP COMPRISING COMMINUTED SYLVINITE ORE AND AN AQUEOUS BRINE SATURATED WITH RESPECT TO SAID ORE, TREATING SAID ORE WITH A SLIME FLOTATION REAGENT COMPRISING MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROXYETHYL CELLULOSE AND ITS ALKALI METAL DERIVATIVE, SUBJECTING THE TREATED ORE PULP TO FORTH FLOTATION, AND SEPARATING THE SLIME THEREFROM.
Claim 2
Dependent Claim
61 words
A PROCESS OF DESLIMING SYLVINITE ORE WHICH COMPRISES PREPARING A PULP COMPRISING COMMINUTED SYLVINITE ORE AND AN AQUEOUS BRINE SATURATED WITH RESPECT TO SAID ORE, TREATING SAID ORE WITH A SLIME FLOTATION REAGENT COMPRISING MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROXYETHYL CELLULOSE AND ITS ALKALI METAL DERIVATIVE, SUBJECTING THE TREATED ORE PULP TO FORTH FLOTATION, AND SEPARATING THE SLIME THEREFROM.
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 |