Patent FR1587785A successfully refreshed from Google Patents.
US2593431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reagent conditioning for electrostatic separation of minerals
Assignee: United States Department of the Interior
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Filing: 1948-01-16
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Granted: 1952-04-22
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Expires: 1968-01-16
Abstract
No abstract record available.
Inventors
- 👤 Fraas Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:10
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A PROCESS FOR THE ELECTROSTATIC SEPARATION OF THE LIBERATED AND DESLIMED CONSTITUENTS OF A MINERAL COMPOSITE OF A TYPE RESISTANT TO CHEMICAL ATTACK AND OF THE CLASS CONSISTING OF KYANITEZIRCON, SILLIMANITE-QUARTZ, AND KYANITE-QUARTZ, WHICH INVOLVES ELECTROSTATIC SEPARATION OF THE COMPOSITE CONSTITUENTS, THE STEPS PRIOR TO SAID SEPARATION WHICH COMPRISE HEATING AND DRYING SAID COMPOSITE AND THEN TREATING SAID HOT DRY COMPOSITE WITH ABOUT 0.05 TO 5 POUNDS OF AN ORGANIC ANIONIC CONDITIONING AGENT PER TON OF COMPOSITE, SAID CONDITIONING AGENT BEING A CARBOXYLIC ACID HAVING A HYDROCARBON APPENDAGE, WHEREBY AT LEAST ONE OF SAID COMPOSITE CONSITITUENTS IS SELECTIVELY FILMED WITH SAID CONDITIONING AGENT AND SAID COMPOSITE CONSTITUTENTS ARE THEREBY RENDERED MORE AMENABLE TO ELECTROSTATIC SEPARATION.
Claim 2
Dependent Claim
116 words
IN A PROCESS FOR THE ELECTROSTATIC SEPARATION OF THE LIBERATED AND DESLIMED CONSTITUENTS OF A MINERAL COMPOSITE OF A TYPE RESISTANT TO CHEMICAL ATTACK AND OF THE CLASS CONSISTING OF KYANITEZIRCON, SILLIMANITE-QUARTZ, AND KYANITE-QUARTZ, WHICH INVOLVES ELECTROSTATIC SEPARATION OF THE COMPOSITE CONSTITUENTS, THE STEPS PRIOR TO SAID SEPARATION WHICH COMPRISE HEATING AND DRYING SAID COMPOSITE AND THEN TREATING SAID HOT DRY COMPOSITE WITH ABOUT 0.05 TO 5 POUNDS OF AN ORGANIC ANIONIC CONDITIONING AGENT PER TON OF COMPOSITE, SAID CONDITIONING AGENT BEING A CARBOXYLIC ACID HAVING A HYDROCARBON APPENDAGE, WHEREBY AT LEAST ONE OF SAID COMPOSITE CONSITITUENTS IS SELECTIVELY FILMED WITH SAID CONDITIONING AGENT AND SAID COMPOSITE CONSTITUTENTS ARE THEREBY RENDERED MORE AMENABLE TO ELECTROSTATIC SEPARATION.
References Cited (Backward Citations)
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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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |