US2805768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for beneficiating potash materials
Assignee: International Minerals and Chemical Corp
•
Filing: 1953-09-01
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Granted: 1957-09-10
•
Expires: 1973-09-01
Abstract
No abstract record available.
Inventors
- 👤 James E Lawver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:39
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF BENEFICIATING A POTASH ORE WHICH COMPRISES HEATING COMMINUTE SLIME-BEARING POTASH ORE PARTICLES HAVING A PARTICLE SIZE OF -8+200 MESH TO A TEMPERATURE IN THE RANGE BETWEEN ABOUT 600*F. AND THE MELTING POINT OF THE PARTICLES, ALLOWING SAID ORE PARTICLES TO COOL TO AN INITIAL SEPARATING TEMPERATURE IN THE RANGE BETWEEN ABOUT 100*F. AND ABOUT 425*F., INDUCING ELECTRIC CHARGES ON SAID PARTICLES, PASSING THE ORE PARTICLES AS FREELY FALLING BODIES THROUGH AN ELECTROSTATIC FIELD, COLLECTING A CONCENTRATE FRACTION AND A TAILING FRAC-TION, SUBJECTING SAID TAILING FRACTION TO A SCAVENGER ELECTROSTATIC SEPARATION AS FREELY FALLING BODIES AT A TEMPERATURE
Claim 2
Independent Claim
100 words
A METHOD OF BENEFICIATING A POTASH ORE WHICH COMPRISES HEATING COMMINUTE SLIME-BEARING POTASH ORE PARTICLES HAVING A PARTICLE SIZE OF -8+200 MESH TO A TEMPERATURE IN THE RANGE BETWEEN ABOUT 600*F. AND THE MELTING POINT OF THE PARTICLES, ALLOWING SAID ORE PARTICLES TO COOL TO AN INITIAL SEPARATING TEMPERATURE IN THE RANGE BETWEEN ABOUT 100*F. AND ABOUT 425*F., INDUCING ELECTRIC CHARGES ON SAID PARTICLES, PASSING THE ORE PARTICLES AS FREELY FALLING BODIES THROUGH AN ELECTROSTATIC FIELD, COLLECTING A CONCENTRATE FRACTION AND A TAILING FRAC-TION, SUBJECTING SAID TAILING FRACTION TO A SCAVENGER ELECTROSTATIC SEPARATION AS FREELY FALLING BODIES AT A TEMPERATURE
References Cited (Backward Citations)
US959646A
Cited
US1679740A
Cited
US1679739A
Cited
US2154682A
Cited
US2168681A
Cited
US2198972A
Cited
US2197865A
Cited
US2235305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |