US3231366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for reducing iron ore and the like
Assignee: Rheinstahl Industrieplanung GmbH
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Filing: 1962-01-26
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Granted: 1966-01-25
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Expires: 1982-01-26
Abstract
No abstract record available.
Inventors
- 👤 Schenck Hermann
- 👤 Wenzel Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; C21B13/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD OF REDUCING ORE, COMPRISING THE STEPS OF PARTLY FILLING A FURNACE TURNABLE ABOUT A SUBSTANTIALLY HORIZONTAL AXIS WITH FINELY SUBDIVIDED REDUCIBLE ORE PARTICLES HAVING A SIZE NOT EXCEEDING 0.5 MM. SO AS TO FORM A BED OF SAID ORE PARTICLES IN SAID FURNACE; PARTIALLY FLUIDIZING SAID BED OF REDUCIBLE ORE PARTICLES BY BLOWING INTO THE SAME A STREAM OF REDUCING AGENT WHICH WITHIN SAID BED IS IN GASEOUS STATE; AND SIMULTANEOUSLY TURNING SAID FURNACE ABOUT SAID AXIS THEREBY FURTHER FLUIDIZING SAID BED, WHEREBY IN SAID FURNACE A FLOATING SUSPENSION OF SAID PARTICLES IN SAID GASEOUS REDUCING AGENT IS OBTAINED PROVIDING AN IMPROVED REDUCING ACTION BETWEEN SAID REDUCING AGENT IN GASEOUS STATE AND SAID FLOATING ORE PARTICLES.
Claim 2
Independent Claim
118 words
A METHOD OF REDUCING ORE, COMPRISING THE STEPS OF PARTLY FILLING A FURNACE TURNABLE ABOUT A SUBSTANTIALLY HORIZONTAL AXIS WITH FINELY SUBDIVIDED REDUCIBLE ORE PARTICLES HAVING A SIZE NOT EXCEEDING 0.5 MM. SO AS TO FORM A BED OF SAID ORE PARTICLES IN SAID FURNACE; PARTIALLY FLUIDIZING SAID BED OF REDUCIBLE ORE PARTICLES BY BLOWING INTO THE SAME A STREAM OF REDUCING AGENT WHICH WITHIN SAID BED IS IN GASEOUS STATE; AND SIMULTANEOUSLY TURNING SAID FURNACE ABOUT SAID AXIS THEREBY FURTHER FLUIDIZING SAID BED, WHEREBY IN SAID FURNACE A FLOATING SUSPENSION OF SAID PARTICLES IN SAID GASEOUS REDUCING AGENT IS OBTAINED PROVIDING AN IMPROVED REDUCING ACTION BETWEEN SAID REDUCING AGENT IN GASEOUS STATE AND SAID FLOATING ORE PARTICLES.
References Cited (Backward Citations)
US1797130A
Cited
US1829438A
Cited
US1976162A
Cited
US2941791A
Cited
US3053648A
Cited
US3072469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |