Patent US2684897A successfully refreshed from Google Patents.
US2684897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smelting of ore, particularly iron ore
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1951-12-28
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Granted: 1954-07-27
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Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Diettrich Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:19
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE PROCESS OF SMELTING IRON-BEARING ORE AND CONJOINTLY PRODUCING GAS PRODUCTS FROM COAL IN A LOW-SHAFT BLAST FURNACE, WHICH COMPRISES THE STEPS OF FORMING MIXED BRIQUETS OF UP TO ABOUT 300 CUBIC CENTIMETERS VOLUME FROM GRANULATED IRON-BEARING ORE AND GRANULATED RAW COAL AND A BINDING AGENT, THE ORE AND THE COAL HAVING A GRAIN SIZE MAXIMUM OF 10 MILLIMETERS, FORMING A BLAST-FURNACE CHARGE OF ABOUT TWO TO SIX METERS HEIGHT ABOVE THE TUYERE LEVEL AND OF UP TO ABOUT THREE METERS WIDTH SUBSTANTIALLY ALL OF THE MIXED BRIQUETS WITH THEIR COAL CONSTITUENT STILL IN THE RAW STATE, ALL OF THE FUEL BEING INCORPORATED IN THE BRIQUETS, PASSING AN OXIDIZING BLAST THROUGH THE CHARGE TO REDUCE AND SMELT THE ORE AND TO CARBONIZE AND GASIFY THE COAL, AND RECOVERING TAR FROM THE EVOLVING TOP GASES.
Claim 2
Dependent Claim
134 words
THE PROCESS OF SMELTING IRON-BEARING ORE AND CONJOINTLY PRODUCING GAS PRODUCTS FROM COAL IN A LOW-SHAFT BLAST FURNACE, WHICH COMPRISES THE STEPS OF FORMING MIXED BRIQUETS OF UP TO ABOUT 300 CUBIC CENTIMETERS VOLUME FROM GRANULATED IRON-BEARING ORE AND GRANULATED RAW COAL AND A BINDING AGENT, THE ORE AND THE COAL HAVING A GRAIN SIZE MAXIMUM OF 10 MILLIMETERS, FORMING A BLAST-FURNACE CHARGE OF ABOUT TWO TO SIX METERS HEIGHT ABOVE THE TUYERE LEVEL AND OF UP TO ABOUT THREE METERS WIDTH SUBSTANTIALLY ALL OF THE MIXED BRIQUETS WITH THEIR COAL CONSTITUENT STILL IN THE RAW STATE, ALL OF THE FUEL BEING INCORPORATED IN THE BRIQUETS, PASSING AN OXIDIZING BLAST THROUGH THE CHARGE TO REDUCE AND SMELT THE ORE AND TO CARBONIZE AND GASIFY THE COAL, AND RECOVERING TAR FROM THE EVOLVING TOP GASES.
References Cited (Backward Citations)
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US1116024A
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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) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |