US3203782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the endothermic processing of ores
Assignee: Dravo Corp
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Filing: 1962-03-13
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Granted: 1965-08-31
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Expires: 1982-03-13
Abstract
No abstract record available.
Inventors
- 👤 Meyer Kurt
- 👤 Struve George Von
- 👤 Stieger Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:15
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; F; F27; F27B; F27B21/00; F27B21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
AN ORE SINTERING PROCESS COMPRISING PASSING A LAYERED CHARGE OF ORE ON A PREVIOUS GRATE THROUGH A PREHEATING ZONE, A COMBUSTION ZONE, AND A COOLING ZONE WHILE INDUCING A DOWNDRAFT OF GAS THROUGH THE CHARGE IN EACH ZONE; SEPARATING THE EXHAUST GASES IN EACH OF THE COMBUSTION AND COOLING ZONES INTO LOW AND HIGH TEMPERATURE EXHAUST GASES; REMOVING THE PREHEATING ZONE EXHAUST GASES SIMULTANEOUSLY WITH THE LOW TEMPERATURE EXHAUST GASES FROM THE COMBUSTION ZONE AND THE LOW TEMPERATURE EXHAUST GASES FROM THE COOLING ZONE BY A SINGLE FAN; TRANSFERRING THE HEAT FROM THE HIGH TEMPERATURE EXHAUST GASES OF THE COMBUSTION AND COOLING ZONES TO A STREAM OF ATMOSPHERIC AIR AND SUBSEQUENTLY DISCHARGING THESE EXHAUST GASES BY THE SINGLE FAN; AND FORCING THE WARMED STREAM OF ATMOSPHERIC AIR TO THE COMBUSTION ZONE AND TO THE PREHEATING ZONE BY ANOTHER FAN FOR ENDOTHERMIC REACTION WITH THE ORE CHARGE TRAVELING THROUG THESE ZONES.
Claim 2
Dependent Claim
150 words
AN ORE SINTERING PROCESS COMPRISING PASSING A LAYERED CHARGE OF ORE ON A PREVIOUS GRATE THROUGH A PREHEATING ZONE, A COMBUSTION ZONE, AND A COOLING ZONE WHILE INDUCING A DOWNDRAFT OF GAS THROUGH THE CHARGE IN EACH ZONE; SEPARATING THE EXHAUST GASES IN EACH OF THE COMBUSTION AND COOLING ZONES INTO LOW AND HIGH TEMPERATURE EXHAUST GASES; REMOVING THE PREHEATING ZONE EXHAUST GASES SIMULTANEOUSLY WITH THE LOW TEMPERATURE EXHAUST GASES FROM THE COMBUSTION ZONE AND THE LOW TEMPERATURE EXHAUST GASES FROM THE COOLING ZONE BY A SINGLE FAN; TRANSFERRING THE HEAT FROM THE HIGH TEMPERATURE EXHAUST GASES OF THE COMBUSTION AND COOLING ZONES TO A STREAM OF ATMOSPHERIC AIR AND SUBSEQUENTLY DISCHARGING THESE EXHAUST GASES BY THE SINGLE FAN; AND FORCING THE WARMED STREAM OF ATMOSPHERIC AIR TO THE COMBUSTION ZONE AND TO THE PREHEATING ZONE BY ANOTHER FAN FOR ENDOTHERMIC REACTION WITH THE ORE CHARGE TRAVELING THROUG THESE ZONES.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |