Patent US3351459A successfully refreshed from Google Patents.
US3351459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pelleting iron ore fines
Assignee: Phillips Petroleum Co
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Filing: 1965-08-16
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Granted: 1967-11-07
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 King L Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:17
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/244; C22B1/245; C22B1/2413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A PROCESS FOR PRODUCING PARTIALLY REDUCED IRON ORE AND COKE PELLETS WHICH COMPRISES THE STEPS OF: (1) MIXING IRON ORE FINES AND HEAVY COKE-FORMING HY DROCARBON IN PROPORTIONS TO FORM PELLETS; (2) FORMING PELLETS OF THE MIXTURE OF STEP (1); (3) GRAVITATING THE PELLETS OF STEP (2) THRU A COKING ZONE IN AN ASCENDING STREAM OF HOT COMBUSTION GAS SO AS TO MAINTAIN A TEMPERATURE IN SAID ZONE IN THE RANGE OF 800 TO 2000*F., THEREBY CRACKING SAID HYDROCARBON TO FORM COKE AND LIGHTER HYDROCARBONS; (4) PRODUCING HARD PELLETS OF COKE AND IRON ORE IN THE COKING ZONE OF STEP (3); (5) GRAVITATING THE PELLETS OF STEP (4) DIRECTLY FROM THE COKING ZONE INTO WATER TO COOL SAID PELLETS AND FORM STEAM; (6) PASSING THE STEAM FORMED IN STEP (5) UPWARDLY THRU SAID COKING ZONE SO AS TO REACT WITH A PORTION OF THE COKE IN SAID PELLETS TO FORM CO AND H2, SAID
Claim 2
Dependent Claim
154 words
A PROCESS FOR PRODUCING PARTIALLY REDUCED IRON ORE AND COKE PELLETS WHICH COMPRISES THE STEPS OF: (1) MIXING IRON ORE FINES AND HEAVY COKE-FORMING HY DROCARBON IN PROPORTIONS TO FORM PELLETS; (2) FORMING PELLETS OF THE MIXTURE OF STEP (1); (3) GRAVITATING THE PELLETS OF STEP (2) THRU A COKING ZONE IN AN ASCENDING STREAM OF HOT COMBUSTION GAS SO AS TO MAINTAIN A TEMPERATURE IN SAID ZONE IN THE RANGE OF 800 TO 2000*F., THEREBY CRACKING SAID HYDROCARBON TO FORM COKE AND LIGHTER HYDROCARBONS; (4) PRODUCING HARD PELLETS OF COKE AND IRON ORE IN THE COKING ZONE OF STEP (3); (5) GRAVITATING THE PELLETS OF STEP (4) DIRECTLY FROM THE COKING ZONE INTO WATER TO COOL SAID PELLETS AND FORM STEAM; (6) PASSING THE STEAM FORMED IN STEP (5) UPWARDLY THRU SAID COKING ZONE SO AS TO REACT WITH A PORTION OF THE COKE IN SAID PELLETS TO FORM CO AND H2, SAID
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |