Patent US4564654A successfully refreshed from Google Patents.
Patent US3562780A successfully refreshed from Google Patents.
US3562780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control of iron ore reducing fluidized beds
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1967-09-05
•
Granted: 1971-02-09
•
Expires: 1987-09-05
Abstract
Abstract IN STAGED FLUIDIZED REDUCTION OF PARTICULATE ORES, PROCESS HEAT IS PROVIDED IN ONE OR MORE OF THE SEVERAL STAGES BY INJECTING INTO SAID STAGES OXYGEN ENRICHED MIXTURES OF WATER AND/OR CARBON DIOXIDE.
Inventors
- 👤 Benjamin Eisenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:44
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |