Patent US3174846A successfully refreshed from Google Patents.
US3174846A
Expired / Lapsed
US
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Method of briquetting iron oxide fines
Assignee: United States Steel Corp
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Filing: 1963-04-10
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Granted: 1965-03-23
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Expires: 1983-04-10
Abstract
No abstract record available.
Inventors
- 👤 Andre H Brisse
- 👤 Donald E Rohaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:22
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD OF BRIQUETTING IRON OXIDE FINES COMPRISNG HEATING THE FINES TO AN ELEVATED TEMPERATRUE, INTRODUCING THE HEATED FINES AND LOW-TEMPERATURE BITUMINOUS COAL FINES TO A MIXER IN PROPORTIONS TO PROVIDE ABOUT 5 TO 1K PERCENT BY WEIGHT OF COA, MIXING THE FINES FOR AT LEAST 30 SECONDS TO ATTAIN A MIXTURE IN WHICH THE IRON OXIDE AND COAL PARTICLES ARE UNIFORMLY DISPERSE, THE TEMPERATURE TO WHICH THE IRON OXIDE FINES ARE HEATED BEING ADJUSTED TO PRODUCE AN APPARENT TEMPERAURE IN THE MIXTURE IN THE RANGE OF ABOUT 600* TO 800*F., AND COMPACTING THE MIXTURE INTO BRIQUETTES DIRECTLY FOLLOWING THE MIXING STEP AND WHILE ITS APPARENT TEMPERATURE REMAINS IN SAID RANGE, THE COAL ITSELF SERVING AS A BINDER IN THE BRIQUETTES.
Claim 2
Independent Claim
121 words
A METHOD OF BRIQUETTING IRON OXIDE FINES COMPRISNG HEATING THE FINES TO AN ELEVATED TEMPERATRUE, INTRODUCING THE HEATED FINES AND LOW-TEMPERATURE BITUMINOUS COAL FINES TO A MIXER IN PROPORTIONS TO PROVIDE ABOUT 5 TO 1K PERCENT BY WEIGHT OF COA, MIXING THE FINES FOR AT LEAST 30 SECONDS TO ATTAIN A MIXTURE IN WHICH THE IRON OXIDE AND COAL PARTICLES ARE UNIFORMLY DISPERSE, THE TEMPERATURE TO WHICH THE IRON OXIDE FINES ARE HEATED BEING ADJUSTED TO PRODUCE AN APPARENT TEMPERAURE IN THE MIXTURE IN THE RANGE OF ABOUT 600* TO 800*F., AND COMPACTING THE MIXTURE INTO BRIQUETTES DIRECTLY FOLLOWING THE MIXING STEP AND WHILE ITS APPARENT TEMPERATURE REMAINS IN SAID RANGE, THE COAL ITSELF SERVING AS A BINDER IN THE BRIQUETTES.
References Cited (Backward Citations)
US1711153A
Cited
US1661636A
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US1923803A
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US2794728A
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US2823109A
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US2918364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |