Patent US3303017A successfully refreshed from Google Patents.
US3303017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treating process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1963-11-14
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Granted: 1967-02-07
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Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 Mayer Francis Xavier
- 👤 Tripp Robert Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:32
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
IN THE PROCESS OF REDUCING IRON ORE BY DIRECT REDUCTION IN A FLUID BED, THE IMPROVEMENT WHICH CONSISTS OF INTRODUCING THE FLUIDIZING GAS INTO THE FLUID BED THROUGH MULITPLE CONICAL GAS DISTRIBUTORS, EACH OF WHICH IS FED BY A SEPARATE CYCLONE GAS-SOLIDS SEPARATOR.
Claim 2
Dependent Claim
43 words
IN THE PROCESS OF REDUCING IRON ORE BY DIRECT REDUCTION IN A FLUID BED, THE IMPROVEMENT WHICH CONSISTS OF INTRODUCING THE FLUIDIZING GAS INTO THE FLUID BED THROUGH MULITPLE CONICAL GAS DISTRIBUTORS, EACH OF WHICH IS FED BY A SEPARATE CYCLONE GAS-SOLIDS SEPARATOR.
Claim 3
Dependent Claim
20 words
AN APAPRATUS FOR CARRYING OUT THE DIRECT REDUCTION OF IRON ORE IN A FLUID BED WHICH COMPRISES AT LEAST TWO
Claim 4
Dependent Claim
20 words
AN APAPRATUS FOR CARRYING OUT THE DIRECT REDUCTION OF IRON ORE IN A FLUID BED WHICH COMPRISES AT LEAST TWO
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |