Consumable electrode melting
Abstract
Abstract A method for producing a metal ingot having a diameter of at least 17 inches, which comprises the steps of: arranging a consumable electrode within a consumable electrode furnace structure; connecting the consumable electrode to the positive terminal of a direct current power supply; establishing a partial pressure of from 30 to 2,000 microns of non-oxidizing gas within the furnace structure; melting the consumable electrode in the partial pressure of from 30 to 2,000 microns by passing an electrical current of at least 5,000 amperes between the consumable electrode and a second electrode which is connected to the negative terminal of said direct current power supply; and casting the molten metal in a mold having a diameter of at least 17 inches.
Inventors
- 👤 Joseph W Tommaney
- 👤 Jack Preston
Bibliographic Details
Claims Analysis
Total Claims: 5References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |