Patent US2586545A successfully refreshed from Google Patents.
US2586545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of nonmetallic ores
Assignee: International Minerals and Chemical Corp
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Filing: 1947-06-03
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Granted: 1952-02-19
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Expires: 1967-06-03
Abstract
No abstract record available.
Inventors
- 👤 Baron Ira Milton Le
- 👤 Walter O Mcclintock
- 👤 James E Lawver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:15
CPC Classifications
C; C05; C05B; C05B11/00; C05B11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR BENEFICIATION OF IRON COMPOUND-CONTAINING PHOSPHATE ROCK SELECTED FROM THE GROUP CONSISTING OF MONTANA AND TENNESSEE PHOSPHATE ROCK HAVING THE IRON COMPOUNDS UNEVENLY DISPERSED THROUGH THE PHOSPHATE MATERIAL AS A COMPONENT WHICH ECONOMICAL COMMINUTION METHODS FAIL TO LIBERATE, WHICH COMPRISES DESLIMING THE COMMINUTED ORE, ROASTING THE COMMINUTED ORE IN A REDUCING ATMOSPHERE AT A TEMPERATURE IN THE RANGE OF BETWEEN ABOUT 750* F. AND ABOUT 1350* F., AND SUBJECTING THE ROASTED ORE TO MAGNETIC SEPARATION TO PRODUCE AT LEAST A PHOSPHATE FRACTION LOW IN IRON CONTENT.
Claim 2
Dependent Claim
88 words
A PROCESS FOR BENEFICIATION OF IRON COMPOUND-CONTAINING PHOSPHATE ROCK SELECTED FROM THE GROUP CONSISTING OF MONTANA AND TENNESSEE PHOSPHATE ROCK HAVING THE IRON COMPOUNDS UNEVENLY DISPERSED THROUGH THE PHOSPHATE MATERIAL AS A COMPONENT WHICH ECONOMICAL COMMINUTION METHODS FAIL TO LIBERATE, WHICH COMPRISES DESLIMING THE COMMINUTED ORE, ROASTING THE COMMINUTED ORE IN A REDUCING ATMOSPHERE AT A TEMPERATURE IN THE RANGE OF BETWEEN ABOUT 750* F. AND ABOUT 1350* F., AND SUBJECTING THE ROASTED ORE TO MAGNETIC SEPARATION TO PRODUCE AT LEAST A PHOSPHATE FRACTION LOW IN IRON CONTENT.
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) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |