US2811435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of fumes in steelmaking operations
Assignee: BOC Group Ltd
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Filing: 1956-03-26
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Granted: 1957-10-29
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Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Bannister Leonard Charles
- 👤 Chater William John Badenoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:22
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/06; C21B7/00; C21B7/002; C21C; C21C5/00; C21C5/28; C21C5/38; C21C5/40; F; F27; F27D; F27D17/00; F27D17/30; C21B2100/00; C21B2100/60; C21B2100/64; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
METHOD FOR THE REMOVAL AND DISPOSAL OF FUMES ARISING FROM THE ACTION OF OXYGEN ON MOLTEN IRON OF STEEL WHICH COMPRISES THE STEPS OF CONFINING THE FUMES WITHIN A LIMITED SPACE ABOVE THE SURFACE IF THE MOLTEN METAL, DRAWING OFF THE FUMES FROM SAID LIMITED SPACE AND DELIVERING SAID FUMES INTO THE LOWER PART OF A BLAST FURNACE.
Claim 2
Dependent Claim
58 words
METHOD FOR THE REMOVAL AND DISPOSAL OF FUMES ARISING FROM THE ACTION OF OXYGEN ON MOLTEN IRON OF STEEL WHICH COMPRISES THE STEPS OF CONFINING THE FUMES WITHIN A LIMITED SPACE ABOVE THE SURFACE IF THE MOLTEN METAL, DRAWING OFF THE FUMES FROM SAID LIMITED SPACE AND DELIVERING SAID FUMES INTO THE LOWER PART OF A BLAST FURNACE.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |