Patent US2860688A successfully refreshed from Google Patents.
Patent US3207596A successfully refreshed from Google Patents.
US3207596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of steel
Assignee: Richard Thomas and Baldwins Ltd
•
Filing: 1961-09-13
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Granted: 1965-09-21
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Expires: 1981-09-13
Abstract
No abstract record available.
Inventors
- 👤 Pinches Elwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:08
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217; C21B; C21B13/00; C21B13/12; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR THE PRODUCTION OF LOW CARBON IRON BY SMELTING AND REFINING IRON IN A SINGLE PROCESS FROM A CHARGE OF IRON ORE, COKE AND LIMESTONE, WHICH COMPRISES CHARGING AN ELECTRIC ARC FURNACE WITH THE CHARGE, ELECTRICALLY HEATING THE CHARGE TO SMELT THE IRON ORE AND TO PRODUCE MOLTEN PIG IRON, COLLECTING THE MOLTEN PIG IRON AS A POOL AT THE BOTTOM OF THE FURNACE, AND INJECTING ESSENTIALY PURE OXYGEN INTO THE POOL OF MOLTEN PIG IRON TO PURIFY IT AND PRODUCE REDUCING GASES WHEREBY AN IRON OF THE DESIRED CARBON CONTENT IS PRODUCED AND HEAT IS GENERATED, THE HOT REDUCING GASES PASSING UP THROUGH THE CHARGE TO ASSIT IN THE HEATING AND SMELTING OF THE CHARGE.
Claim 2
Dependent Claim
118 words
A PROCESS FOR THE PRODUCTION OF LOW CARBON IRON BY SMELTING AND REFINING IRON IN A SINGLE PROCESS FROM A CHARGE OF IRON ORE, COKE AND LIMESTONE, WHICH COMPRISES CHARGING AN ELECTRIC ARC FURNACE WITH THE CHARGE, ELECTRICALLY HEATING THE CHARGE TO SMELT THE IRON ORE AND TO PRODUCE MOLTEN PIG IRON, COLLECTING THE MOLTEN PIG IRON AS A POOL AT THE BOTTOM OF THE FURNACE, AND INJECTING ESSENTIALY PURE OXYGEN INTO THE POOL OF MOLTEN PIG IRON TO PURIFY IT AND PRODUCE REDUCING GASES WHEREBY AN IRON OF THE DESIRED CARBON CONTENT IS PRODUCED AND HEAT IS GENERATED, THE HOT REDUCING GASES PASSING UP THROUGH THE CHARGE TO ASSIT IN THE HEATING AND SMELTING OF THE CHARGE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |