US2957576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of molybdenite by flotation
Assignee: Atlantic Richfield Co
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Filing: 1958-03-07
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Granted: 1960-10-25
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Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 Harry B Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:27
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/018; B03D1/002; B03D1/004; B03D1/016; B03D1/0046; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR RECOVERING MOLYDENITE FROM A FLOTATION CONCENTRATE CONTAINING COPPER SULFIDE AND MOLYBDINITE WHICH COMPRISES SUBJECING AN AQUEOUS PULP OF THE CONCENTRATE TO FROTH FLOATION IN THE PRESENCE OF A FROTHING AGENT, FROM 0.1 TO 0.5 POUND PER TON OF CONCENTRATE OF AN AQUEOUS EMULSION CONTAINING FROM 5 TO 30 PERCENT BY WEIGHT OF A DIMETHYLPOLYSILOXANE HAVING A VISCOSITY OF AT LEAST 200 CVENTIPOISES AT 25*C., AND FROM 2 TO 5 POUNDS PER TON OF CONCENTRATE OF AN INORGANIC COMPOUND OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC, AND ANTIMONY, SAID INORGANIC COMPOUND CONTAINING BIVALENT SULFUR AND AN INORGANIC CATION.
Claim 2
Dependent Claim
104 words
A PROCESS FOR RECOVERING MOLYDENITE FROM A FLOTATION CONCENTRATE CONTAINING COPPER SULFIDE AND MOLYBDINITE WHICH COMPRISES SUBJECING AN AQUEOUS PULP OF THE CONCENTRATE TO FROTH FLOATION IN THE PRESENCE OF A FROTHING AGENT, FROM 0.1 TO 0.5 POUND PER TON OF CONCENTRATE OF AN AQUEOUS EMULSION CONTAINING FROM 5 TO 30 PERCENT BY WEIGHT OF A DIMETHYLPOLYSILOXANE HAVING A VISCOSITY OF AT LEAST 200 CVENTIPOISES AT 25*C., AND FROM 2 TO 5 POUNDS PER TON OF CONCENTRATE OF AN INORGANIC COMPOUND OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS, ARSENIC, AND ANTIMONY, SAID INORGANIC COMPOUND CONTAINING BIVALENT SULFUR AND AN INORGANIC CATION.
References Cited (Backward Citations)
US2811255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |