US3212877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of agglomerating ore
Assignee: United States Steel Corp
•
Filing: 1963-01-24
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Granted: 1965-10-19
•
Expires: 1983-01-24
Abstract
No abstract record available.
Inventors
- 👤 Roger L Rueckl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:29
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF AGGLOMERATING ORE MATERIAL FINES COMPRISING MIXING MINUS 1/8 INCH FINES WITH A CARBONACEOUS MATERIAL WHICH HAS A SOFTENING TEMPERATURE IN THE RANGE OF ABOUT 210* TO 725*F. AND A RESIDUAL CARBON CONTENT OF AT LEAST 55 PERCENT IN PROPORTIONS TO PROVIDE ABOUT 6 TO 21 PERCENT BY WEIGHT OF CARBONACEIOUS MATERIAL IN THE RESULTING MIXTURE, HEATING THE MIXTURE TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 220* TO 725*F. TO SOFTEN THE CARBONACEIOUS MATERIAL WITHOUT SIGNIFICANTLY COKING IT, AND EXTRUDING THE HEATED MIXTURE WITH THE SOFTENED CARBONACEOUS MATERIAL ACTING AS A LUBRICANT DURING EXTRUSION, SAID CARBONACEIOUS MATERIAL ACTING AS A BINDER IN SUBSTANTIALLY ITS ORIGINAL STATE IN THE EXTRUDED PRODUCT AFTER THE PRODUCT COOLS AND THE CARBONACEIOUS MATERIAL SOLIDIFIES.
Claim 2
Independent Claim
122 words
A METHOD OF AGGLOMERATING ORE MATERIAL FINES COMPRISING MIXING MINUS 1/8 INCH FINES WITH A CARBONACEOUS MATERIAL WHICH HAS A SOFTENING TEMPERATURE IN THE RANGE OF ABOUT 210* TO 725*F. AND A RESIDUAL CARBON CONTENT OF AT LEAST 55 PERCENT IN PROPORTIONS TO PROVIDE ABOUT 6 TO 21 PERCENT BY WEIGHT OF CARBONACEIOUS MATERIAL IN THE RESULTING MIXTURE, HEATING THE MIXTURE TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 220* TO 725*F. TO SOFTEN THE CARBONACEIOUS MATERIAL WITHOUT SIGNIFICANTLY COKING IT, AND EXTRUDING THE HEATED MIXTURE WITH THE SOFTENED CARBONACEOUS MATERIAL ACTING AS A LUBRICANT DURING EXTRUSION, SAID CARBONACEIOUS MATERIAL ACTING AS A BINDER IN SUBSTANTIALLY ITS ORIGINAL STATE IN THE EXTRUDED PRODUCT AFTER THE PRODUCT COOLS AND THE CARBONACEIOUS MATERIAL SOLIDIFIES.
References Cited (Backward Citations)
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US1478215A
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GB219706A
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US1863507A
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GB679165A
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US2834660A
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US2918364A
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |