Patent US3219436A successfully refreshed from Google Patents.
US3219436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reducing iron oxides into sponge iron
Assignee: GEA Group AG
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Filing: 1963-06-24
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Granted: 1965-11-23
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Heitmann Gunter
- 👤 Meyer Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:43
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD FOR REDUCING PELLETS COMPOSED OF IRON OXIDES TO SPONGE IRON COMPRISING DIRECTLY INTRODUCING MOIST, PLASTIC GREEN PELLETS ALONG WITH AN EXCESS OF SOLID REDUCING MATERIAL INTO THE PRE-HEATING ZONE OF A ROTARY FURNACE HAVING A PLURALITY OF BURNER NOZZLES POSITIONED SUBSTANTIALLY ALONG THE LONGITUDINAL AXIS OF SAID FURNACE
Claim 2
Independent Claim
50 words
A METHOD FOR REDUCING PELLETS COMPOSED OF IRON OXIDES TO SPONGE IRON COMPRISING DIRECTLY INTRODUCING MOIST, PLASTIC GREEN PELLETS ALONG WITH AN EXCESS OF SOLID REDUCING MATERIAL INTO THE PRE-HEATING ZONE OF A ROTARY FURNACE HAVING A PLURALITY OF BURNER NOZZLES POSITIONED SUBSTANTIALLY ALONG THE LONGITUDINAL AXIS OF SAID FURNACE
References Cited (Backward Citations)
US2869850A
Cited
US2805141A
Cited
US2797077A
Cited
US2941791A
Cited
US2925336A
Cited
US3036822A
Cited
US3029141A
Cited
US3046106A
Cited
US3068091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |