US3147329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heating metal melting furnaces
Assignee: Union Carbide Corp
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Filing: 1960-08-17
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Granted: 1964-09-01
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Expires: 1980-08-17
Abstract
No abstract record available.
Inventors
- 👤 Robert M Gage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:17
CPC Classifications
B; B23; B23K; B23K10/00; H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3421
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
THE COMBINATION WITH A CRUCIBLE FOR METAL TO BE MELTED, OF MEANS FOR METLING SUCH METAL COMPRISING NONCONSUMABLE ELECTRODE MEANS FOR PRODUCING A HIGH-PRESSURE ELECTRIC ARC BETWEEN THE ELECTRODE AND THE METAL, MEANS FOR DIRECTIONALLY STABILIZING SAID HIGH-PRESSURE ARC ENERGIZED BETWEEN SUCH METAL AND SAID ELECTRODE WHICH LAST NAMED MEANS COMPRISES A NOZZLE SURROUNDING SUCH ELECTRODE AND HAVING A CONSTRICTED OUTLET PORTION IN AXIAL ALIGNMENT WITH SAID NON-CONSUMABLE ELECTRODE WITH SAID NON-CONSUMABLE ELECTRODE EXTENDING INTO SAID CONSTRICTED OUTLET PORTION AND AN ANNULAR GAS STREAM WHICH SURROUNDS THE ELECTRODE AND IS DIRECTED INTO INTIMATE CONTACT WITH THE ARC WHEREBY A SUBSTANTIAL PORTION THEREOF IS IONIZED, AND MEANS FOR CONNECTING SAID METAL AND TORCH TO A SUITABLE SOURCE OF ELECTRICAL POWER.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |