US3138550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation process employing polymeric flocculants
Assignee: Union Carbide Corp
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Filing: 1960-11-28
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Granted: 1964-06-23
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Robert G Woolery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:20
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D1/008; B03D2201/00; B03D2201/002; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN FROTH FLOTATION PROCESSES FOR FRACTIONATING PULPS CONTAINING SLIME FORMING METALLIC ORE VALUES INTO CONCENTRATES AND TAILINGS WHEREIN AT LEAST ONE AGENT HAVING COLLECTOR PROPERTIES IS UTILIZED, THE IMPROVEMENT COMPRISING ADDING TO SAID PULP AT LEAST ONE POLYMERIC FLOCCULATING AGENT SELECTED FROM THE GROUP CONSISTING OF FLOCCULATING POLYSACCHARIDES, POLYACRYLAMIDES AND FLOCCULATING GLUES IN AN AMOUNT SUFFICIENT TO CAUSE FORMATION AND MAINTENANCE OF A FLOC OF THE METALLIC ORE VALUE SLIMES IN SAID PULP DURING FLOTATION TREATMENT OF SAID PULP AND RECOVERING SAID FLOC FROM THE FROTH AS A CONCENTRATE.
Claim 2
Dependent Claim
89 words
IN FROTH FLOTATION PROCESSES FOR FRACTIONATING PULPS CONTAINING SLIME FORMING METALLIC ORE VALUES INTO CONCENTRATES AND TAILINGS WHEREIN AT LEAST ONE AGENT HAVING COLLECTOR PROPERTIES IS UTILIZED, THE IMPROVEMENT COMPRISING ADDING TO SAID PULP AT LEAST ONE POLYMERIC FLOCCULATING AGENT SELECTED FROM THE GROUP CONSISTING OF FLOCCULATING POLYSACCHARIDES, POLYACRYLAMIDES AND FLOCCULATING GLUES IN AN AMOUNT SUFFICIENT TO CAUSE FORMATION AND MAINTENANCE OF A FLOC OF THE METALLIC ORE VALUE SLIMES IN SAID PULP DURING FLOTATION TREATMENT OF SAID PULP AND RECOVERING SAID FLOC FROM THE FROTH AS A CONCENTRATE.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |