US3372223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc reduction furnace and method
Assignee: Pechiney SA
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Filing: 1965-01-13
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Granted: 1968-03-05
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Expires: 1985-01-13
Abstract
No abstract record available.
Inventors
- 👤 Menegoz Charles Daniel
- 👤 Damesin Francois
- 👤 Socquet Serge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/08; C; C21; C21B; C21B11/00; C21B13/00; C21B13/12; C21C; C21C5/00; C21C5/52; C21C5/527; C22; C22B; C22B4/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN ELECTRIC ARC FURNACE FRO REDUCTION OF A FEED MATERIAL COMPRISING AN OXIDE ORE AND A CARBONACEOUS REDUCING AGENT, IN WHICH SUBSTANTIALLY OFF OF THE ELECTRIC CURRENT SUPPLIED TO ECH ELECTRODE PASSES FROM SAID ELECTRODE INTO HE STRIPPED MOLTEN BATH ON THE HEARTH OF THE FURNACE DIRECTLY THROUGH THE ARC AS DISTINGUISHED FROM PASSAGE THROUGH THE ARC AND THROUGH THE FEED MATERIAL, AN ELECTRICALLY INSULATING DEVICE ABOUT A PORTION OF EACH ELECTRODE AND ENGAGING THE ELECTRODE IN SEALING REALTIONSHIP TO PREVENT THE ESCAPE OF VAPORS THEREBETWEEN, A LATERAL PROLONGATION OF SAID DEVICE GASTIGHTLY EXTENDING LIKE A DOME ACROSS THE TOP OF THE FURNACE TO THE FURNACE SIDE WALLS, AT LEAST ONE FEED OPENING IN A FURNACE SIDE WALL FOR INTRODUCTION OF THE FEED MATERIAL INTO THE FURNACE, A FEED TUNNEL LEADING TO THE FEED OPENING WHICH IS LOCATED IN SPACED
Claim 2
Dependent Claim
140 words
AN ELECTRIC ARC FURNACE FRO REDUCTION OF A FEED MATERIAL COMPRISING AN OXIDE ORE AND A CARBONACEOUS REDUCING AGENT, IN WHICH SUBSTANTIALLY OFF OF THE ELECTRIC CURRENT SUPPLIED TO ECH ELECTRODE PASSES FROM SAID ELECTRODE INTO HE STRIPPED MOLTEN BATH ON THE HEARTH OF THE FURNACE DIRECTLY THROUGH THE ARC AS DISTINGUISHED FROM PASSAGE THROUGH THE ARC AND THROUGH THE FEED MATERIAL, AN ELECTRICALLY INSULATING DEVICE ABOUT A PORTION OF EACH ELECTRODE AND ENGAGING THE ELECTRODE IN SEALING REALTIONSHIP TO PREVENT THE ESCAPE OF VAPORS THEREBETWEEN, A LATERAL PROLONGATION OF SAID DEVICE GASTIGHTLY EXTENDING LIKE A DOME ACROSS THE TOP OF THE FURNACE TO THE FURNACE SIDE WALLS, AT LEAST ONE FEED OPENING IN A FURNACE SIDE WALL FOR INTRODUCTION OF THE FEED MATERIAL INTO THE FURNACE, A FEED TUNNEL LEADING TO THE FEED OPENING WHICH IS LOCATED IN SPACED
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |