US3379815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc furnace having two hearths and interchangeable roofs therefor
Assignee: Lectromelt Corp
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Filing: 1965-09-08
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Granted: 1968-04-23
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 William B Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:18
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5252; F; F27; F27D; F27D11/00; F27D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN AN ELECTRIC ARC FURNACE THE COMBINATION OF FIRST AND SECOND SPACED APART FURNACE BODIES, A SEALED ENCLOSURE MOUNTED FOR ROTATION ABOUT A FIRST VERTICAL AXIS DISPOSED EQUIDISTANTLY FROM EACH OF SAID FURNACE BODIES, A PLURALITY OF ELECTRODES EXTENDING DOWNWARDLY THROUGH SAID ENCLOSURE, ELECTRODE POSITIONING MEANS DISPOSED WITHIN SAID ENCLOSURE AND INCLUDING AN ELECTRODE CLAMP ENGAGEABLE WITH EACH OF SAID ELECTRODES AND MEANS FOR RAISING AND LOWERING SAID ELECTRODE CLAMPS RELATIVE TO SAID ENCLOSURE, TRANSFORMER MEANS DISPOSED WITHIN SAID ENCLOSURE AND BEING ELECTRICALLY CONNECTED TO SAID ELECTRODES FOR PROVIDING ENERGIZING CURRENT THERETO, A FIRST FURNACE COVER, MEANS FOR SUSPENDING SAID FIRST FURNACE COVER BELOW SAID ENCLOSURE AND FOR MOVING SAID FIRST COVER VERTICALLY, SAID ELECTRODES EXTENDING THROUGH SAID FIRST FURNACE COVER, A SECOND FURNACE COVER, HEATER MEANS DISPOSED IN SAID
Claim 2
Dependent Claim
130 words
IN AN ELECTRIC ARC FURNACE THE COMBINATION OF FIRST AND SECOND SPACED APART FURNACE BODIES, A SEALED ENCLOSURE MOUNTED FOR ROTATION ABOUT A FIRST VERTICAL AXIS DISPOSED EQUIDISTANTLY FROM EACH OF SAID FURNACE BODIES, A PLURALITY OF ELECTRODES EXTENDING DOWNWARDLY THROUGH SAID ENCLOSURE, ELECTRODE POSITIONING MEANS DISPOSED WITHIN SAID ENCLOSURE AND INCLUDING AN ELECTRODE CLAMP ENGAGEABLE WITH EACH OF SAID ELECTRODES AND MEANS FOR RAISING AND LOWERING SAID ELECTRODE CLAMPS RELATIVE TO SAID ENCLOSURE, TRANSFORMER MEANS DISPOSED WITHIN SAID ENCLOSURE AND BEING ELECTRICALLY CONNECTED TO SAID ELECTRODES FOR PROVIDING ENERGIZING CURRENT THERETO, A FIRST FURNACE COVER, MEANS FOR SUSPENDING SAID FIRST FURNACE COVER BELOW SAID ENCLOSURE AND FOR MOVING SAID FIRST COVER VERTICALLY, SAID ELECTRODES EXTENDING THROUGH SAID FIRST FURNACE COVER, A SECOND FURNACE COVER, HEATER MEANS DISPOSED IN SAID
References Cited (Backward Citations)
US3197539A
Cited
US3290031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |