Patent US3022956A successfully refreshed from Google Patents.
US3022956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of ores
Assignee: International Minerals and Chemical Corp
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Filing: 1958-04-14
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Granted: 1962-02-27
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Expires: 1978-04-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Haseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:05
CPC Classifications
B; B03; B03C; B03C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR BENEFICIATION OF A MAGNETITE-APATITE ORE WHICH COMPRISES COMMINUTING THE ORE TO AT LEAST 70% LIBERATION BUT LESS THAN 95% LIBERATION OF MAGNETITE FROM APATITE, SUBJECTING THE COMMINUTED ORE TO A DRY LOW INTENSITY MAGNETIC SEPARATION AND SEPARATELY RECOVERING A FIRST MAGNETIC FRACTION CONTAINING THE LARGER PROPORTION OF THE MAGNETIC VALUES AND A FIRST NON-MAGNETIC FRACTION CONTAINING THE LARGER PROPORTION OF THE APATITE VALUES, SUBJECTING THE FIRST MAGNETIC FRACTION TO A COMMINUTING OPERATION TO EFFECT SUBSTANTIALLY COMPLETE LIBERATION OF MAGNETITE FROM APATITE, SUBSEQUENTLY SUBJECTING THE COMMINUTED MAGNETIC FRACTION TO A WET LOW INTENSITY MAGNETIC SEPARATION AND SEPARATELY RECOVERING A SECOND MAGNETIC FRACTION OF LOW APATITE CONTENT AND A SECOND NONMAGNETIC FRACTION.
Claim 2
Dependent Claim
113 words
A PROCESS FOR BENEFICIATION OF A MAGNETITE-APATITE ORE WHICH COMPRISES COMMINUTING THE ORE TO AT LEAST 70% LIBERATION BUT LESS THAN 95% LIBERATION OF MAGNETITE FROM APATITE, SUBJECTING THE COMMINUTED ORE TO A DRY LOW INTENSITY MAGNETIC SEPARATION AND SEPARATELY RECOVERING A FIRST MAGNETIC FRACTION CONTAINING THE LARGER PROPORTION OF THE MAGNETIC VALUES AND A FIRST NON-MAGNETIC FRACTION CONTAINING THE LARGER PROPORTION OF THE APATITE VALUES, SUBJECTING THE FIRST MAGNETIC FRACTION TO A COMMINUTING OPERATION TO EFFECT SUBSTANTIALLY COMPLETE LIBERATION OF MAGNETITE FROM APATITE, SUBSEQUENTLY SUBJECTING THE COMMINUTED MAGNETIC FRACTION TO A WET LOW INTENSITY MAGNETIC SEPARATION AND SEPARATELY RECOVERING A SECOND MAGNETIC FRACTION OF LOW APATITE CONTENT AND A SECOND NONMAGNETIC FRACTION.
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |