US3008573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic separation process
Assignee: International Minerals and Chemical Corp
•
Filing: 1960-03-31
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Granted: 1961-11-14
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Expires: 1980-03-31
Abstract
No abstract record available.
Inventors
- 👤 John H Gross
- 👤 John J Sholine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:41
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE PROCESS WHICH COMPRISES CONTACTING A MIXTURE OF PARTICULATE SODIUM SALTS AND POTASSIUM SALTS SELECTED FROM THE GROUP CONSISTING OF THE SODIUM HALIDES AND SULFATES AND THE POTASSIUM HALIDES AND SULFATES WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF LIQUID AND GASEOUS AMMONIA TO EFFECT AT LEAST A SURFACE MODIFICATION OF AT LEAST A PORTION OF THE SURFACES OF THE SALT PARTICLES PRESENT IN SAID MIXTURE THEREAFTER INDUCING SAID PARTICLES TO ACCEPT DIFFERENTIAL CHARGES BY CONTACT ELECTRIFICATION AND SUBJECTING THE DIFFERENTIALLY CHARGED PARTICLE MIXTURE TO THE ACTION OF AN ELECTROSTATIC FIELD.
Claim 2
Dependent Claim
92 words
THE PROCESS WHICH COMPRISES CONTACTING A MIXTURE OF PARTICULATE SODIUM SALTS AND POTASSIUM SALTS SELECTED FROM THE GROUP CONSISTING OF THE SODIUM HALIDES AND SULFATES AND THE POTASSIUM HALIDES AND SULFATES WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF LIQUID AND GASEOUS AMMONIA TO EFFECT AT LEAST A SURFACE MODIFICATION OF AT LEAST A PORTION OF THE SURFACES OF THE SALT PARTICLES PRESENT IN SAID MIXTURE THEREAFTER INDUCING SAID PARTICLES TO ACCEPT DIFFERENTIAL CHARGES BY CONTACT ELECTRIFICATION AND SUBJECTING THE DIFFERENTIALLY CHARGED PARTICLE MIXTURE TO THE ACTION OF AN ELECTROSTATIC FIELD.
References Cited (Backward Citations)
US2556483A
Cited
US2805768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |