Patent US3015553A successfully refreshed from Google Patents.
US3015553A
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Slag reduction process
Assignee: Strategic Materials Corp
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Filing: 1960-07-01
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Granted: 1962-01-02
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Expires: 1980-07-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:43
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C22; C22B; C22B7/00; C22B7/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S75/00; Y10S75/959
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
PROCESS OF TREATING SLAG FROM BURNING COAL WHICH COMPRISES PASSING THE HOT SLAG INTO A FURNACE, REDUCING WITH HOT CARBON THE MAJOR PORTION OF THE IRON OXIDE TO IRON, REMOVING THE SLAG AND THE REDUCED IRON CONTAINED THEREIN FROM THE FURNACE, ROLLING THE REDUCED SLAG INTO A THIN SHEET, SHATTERING THE SHEET AND SEPARATING THE REDUCED IRON LEAVING THE SLAG IN THE FORM OF SMALL FLAKES.
Claim 2
Dependent Claim
66 words
PROCESS OF TREATING SLAG FROM BURNING COAL WHICH COMPRISES PASSING THE HOT SLAG INTO A FURNACE, REDUCING WITH HOT CARBON THE MAJOR PORTION OF THE IRON OXIDE TO IRON, REMOVING THE SLAG AND THE REDUCED IRON CONTAINED THEREIN FROM THE FURNACE, ROLLING THE REDUCED SLAG INTO A THIN SHEET, SHATTERING THE SHEET AND SEPARATING THE REDUCED IRON LEAVING THE SLAG IN THE FORM OF SMALL FLAKES.
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) | 1965-01-01 | 1965-07-03 | 1966-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-01 | 1969-07-03 | 1970-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-01 | 1973-07-03 | 1974-01-02 | $7700.00 | Window Closed / Lapsed |