US2671724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating scrap in open hearth furnaces
Assignee: National Steel Corp
•
Filing: 1952-05-05
•
Granted: 1954-03-09
•
Expires: 1972-05-05
Abstract
No abstract record available.
Inventors
- 👤 Walter W Kompart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:20
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/04; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN THE METHOD OF MAKING STEEL IN AN OPEN HEARTH FURNACE, THE STEPS COMPRISING, PLACING A CHARGE OF PIECES OF SCRAP METAL IN A PILE IN SUCH A FURNACE, DIRECTING HEATING FLAMES INTO THE FURNACE FIRST TO HEAT THE SCRAP METAL TO THE IGNITION TEMPERATURE AND THEN TO HEAT AND MELT THE SCRAP METAL, AND DISCHARGING OXYGEN RICH GAS THAT IS PREDOMINATELY OXYGEN INTO THE PILE OF SCRAP METAL AT A POINT INSIDE OF THE PILE OF SCRAP METAL WHILE THE SCRAP METAL IS AT A TEMPERATURE BELOW THE IGNITION TEMPERATURE TO FLOOD THE INTERSTICES BETWEEN THE PIECES OF SOLID SCRAP METAL WITH THE OXYGEN RICH GAS TO AID THE HEATING FLAMES IN HEATING THE INTERIOR PORTION OF THE PILE OF SCRAP METAL.
Claim 2
Dependent Claim
123 words
IN THE METHOD OF MAKING STEEL IN AN OPEN HEARTH FURNACE, THE STEPS COMPRISING, PLACING A CHARGE OF PIECES OF SCRAP METAL IN A PILE IN SUCH A FURNACE, DIRECTING HEATING FLAMES INTO THE FURNACE FIRST TO HEAT THE SCRAP METAL TO THE IGNITION TEMPERATURE AND THEN TO HEAT AND MELT THE SCRAP METAL, AND DISCHARGING OXYGEN RICH GAS THAT IS PREDOMINATELY OXYGEN INTO THE PILE OF SCRAP METAL AT A POINT INSIDE OF THE PILE OF SCRAP METAL WHILE THE SCRAP METAL IS AT A TEMPERATURE BELOW THE IGNITION TEMPERATURE TO FLOOD THE INTERSTICES BETWEEN THE PIECES OF SOLID SCRAP METAL WITH THE OXYGEN RICH GAS TO AID THE HEATING FLAMES IN HEATING THE INTERIOR PORTION OF THE PILE OF SCRAP METAL.
References Cited (Backward Citations)
FR873301A
Cited
US1252443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |