US2986458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of iron from ferrous slag materials
Assignee: Strategic Materials Corp
•
Filing: 1958-09-05
•
Granted: 1961-05-30
•
Expires: 1978-09-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:46
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/02; C21B13/023; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A METALLURRGICAL PROCESS FOR THE PRODUCTION OF LOW-SULFUR IRON FROM A SLAG WHICH CONSISTS MAINLY OF IRON SILICATE BY BLOWING INTO THE SLAG A HYDROCARBON GAS AND PULVERULENT LIME, THE IMPROVEMENT THAT COMPRISES CHARGING SAID SLAG OVER A POOL OF MOLTEN IRON, SAID POOL ACTING TO COLLECT THE IRON SUBSEQUENTLY REDUCED FROM SAID SLAG, AND PREHEATING SAID HYDROCARBON GAS TO AT LEAST 200*C. AND SAID LIME TO AT LEAST 700*C. PRIOR TO SAID BLOWING TO
Claim 2
Dependent Claim
76 words
IN A METALLURRGICAL PROCESS FOR THE PRODUCTION OF LOW-SULFUR IRON FROM A SLAG WHICH CONSISTS MAINLY OF IRON SILICATE BY BLOWING INTO THE SLAG A HYDROCARBON GAS AND PULVERULENT LIME, THE IMPROVEMENT THAT COMPRISES CHARGING SAID SLAG OVER A POOL OF MOLTEN IRON, SAID POOL ACTING TO COLLECT THE IRON SUBSEQUENTLY REDUCED FROM SAID SLAG, AND PREHEATING SAID HYDROCARBON GAS TO AT LEAST 200*C. AND SAID LIME TO AT LEAST 700*C. PRIOR TO SAID BLOWING TO
References Cited (Backward Citations)
US453227A
Cited
US723501A
Cited
US828583A
Cited
FR444809A
Cited
US1043371A
Cited
US1319061A
Cited
US1471270A
Cited
GB396690A
Cited
GB622419A
Cited
US2820706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |