US2900249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface blowing process for making steel
Assignee: United States Steel Corp
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Filing: 1956-06-01
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Granted: 1959-08-18
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Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Walter L Kerlie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PNEUMATIC PROCESS FOR REFINING IRON WHICH COMPRISES CHARGING A BATH OF MOLTEN IRON AND SLAG IN A CONVERTER, PROJECTING AN OXIDIZING BLAST AT A LOW ANGLE OF INCIDENCE AGAINST THE SURFACE OF SAID BATH IN A DIRECTION ACROSS AN AREA OF SAID SURFACES ARRANGED CENTRALLY BETWEEN SURFACE AREA AT THEE ENDS THEREOF, UTLIZING SAID BLAST TO MOVE SLAG OVER SAID CENTRAL AREA, AND CIRCULATING THE SLAG IN OPPOSITE ROTATIONAL DIRECTIONS OVER THE SAID END AREAS OF SAID BATH TO RETURN IT INTO THE PATH OF SAID BLAST.
Claim 2
Dependent Claim
88 words
A PNEUMATIC PROCESS FOR REFINING IRON WHICH COMPRISES CHARGING A BATH OF MOLTEN IRON AND SLAG IN A CONVERTER, PROJECTING AN OXIDIZING BLAST AT A LOW ANGLE OF INCIDENCE AGAINST THE SURFACE OF SAID BATH IN A DIRECTION ACROSS AN AREA OF SAID SURFACES ARRANGED CENTRALLY BETWEEN SURFACE AREA AT THEE ENDS THEREOF, UTLIZING SAID BLAST TO MOVE SLAG OVER SAID CENTRAL AREA, AND CIRCULATING THE SLAG IN OPPOSITE ROTATIONAL DIRECTIONS OVER THE SAID END AREAS OF SAID BATH TO RETURN IT INTO THE PATH OF SAID BLAST.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |