US3264091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing highly metallized pellets
Assignee: McDowell-Wellman Engineering Co
•
Filing: 1963-06-20
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Granted: 1966-08-02
•
Expires: 1983-06-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Ban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:29
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0046; C21B13/0053; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR MAKING HIGHLY METALLIZED PELLETS, COMPRISING THE STEPS OF: (A) FORMING A MIXTURE OF FINES OF IRON ORE, A CARBONACEOUS MATERIAL, AND A FLUXING MATERIAL, THE CARBONACEOUS MATERIAL CONTAINING AVAILABLE CARBON IN AMOUNT SUFFICIENT TO REDUCE 100% OF THE IRON OXIDE IN SAID ORE TO FREE METAL, (B) FORMING MOISTENED PELLETS OF SAID MIXTURE HAVING AN AVERAGE DIAMETER OF ABOUT -1.5 INCH, +3/8 INCH, (C) CHARGING SAID MOISTENED PELLETS ON AN ENDLESS CONVEYOR AT A DEPTH OF FROM 3 TO 20 INCHES, TO FORM A BURDEN OF MOIST PELLETS, (D) DRYING SAID BURDEN BY PASSING SUBSTANTIALLY NEUTRAL GASES RANGING IN TEMPERATURE FROM 300*F. TO 600*F. THROUGH THE BURDEN, (E) HEATING SAID BURDEN BY PASSING PREHEATED, NONREACTIVE GASES CONTAINING NOT MORE THAN 15% OF
Claim 2
Dependent Claim
125 words
A PROCESS FOR MAKING HIGHLY METALLIZED PELLETS, COMPRISING THE STEPS OF: (A) FORMING A MIXTURE OF FINES OF IRON ORE, A CARBONACEOUS MATERIAL, AND A FLUXING MATERIAL, THE CARBONACEOUS MATERIAL CONTAINING AVAILABLE CARBON IN AMOUNT SUFFICIENT TO REDUCE 100% OF THE IRON OXIDE IN SAID ORE TO FREE METAL, (B) FORMING MOISTENED PELLETS OF SAID MIXTURE HAVING AN AVERAGE DIAMETER OF ABOUT -1.5 INCH, +3/8 INCH, (C) CHARGING SAID MOISTENED PELLETS ON AN ENDLESS CONVEYOR AT A DEPTH OF FROM 3 TO 20 INCHES, TO FORM A BURDEN OF MOIST PELLETS, (D) DRYING SAID BURDEN BY PASSING SUBSTANTIALLY NEUTRAL GASES RANGING IN TEMPERATURE FROM 300*F. TO 600*F. THROUGH THE BURDEN, (E) HEATING SAID BURDEN BY PASSING PREHEATED, NONREACTIVE GASES CONTAINING NOT MORE THAN 15% OF
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |