US3254149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum melting of metals
Assignee: Titanium Metals Corp
•
Filing: 1965-05-10
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Granted: 1966-05-31
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Donald E Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
C; C22; C22B; C22B4/00; C21; C21C; C21C5/00; C21C5/52; C21C7/00; C21C7/10; H; H05; H05B; H05B7/00; H05B7/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
IN A METHOD FOR ARC MELTING A TITANIUM BASE ALLOY FORMED AS A COMBINATION OF METALS SELECTED FROM THE GROUP CONSISTING OF BE, TE, SB, G, SI, W, FE, CO, CU, NI, MG, MN, MO, SN, ZR, TI, CR, CB, V, TA, AND AL, AND HAVING AA PLASMA GENERATING CAPACITY "P" OF OVER 4 THE IMPROVEMENTS COMPRISING: (A) EMPLOYING SAID METAL IN THE FORM OF A TRIO OF CONSUMABLE ELECTRODES, AND MELTING SAID ELECTRODES TO FORM AN INGOT IN AN ARC FURNACE EVACUATED TO A PRESSURE BELOW ONE MILLIMETER OF MERCURY ABSOLUTE; (B) SUPPLYING THREE-PHASE ALTERNATING ELECTRIC CURRENT AS MELTING POWER WITH EACH PHASE OF SAID CURRENT BEING CONNECTED TO ONE OF SAID TRIO OF ELECTRODES; (C) THE EQUIVALENT CIRCULAR DIAMETER OF EACH OF SAID ELECTRODES OF SAID METAL BEING A MINIMUM DETERMINED FROM THE EQUATION
References Cited (Backward Citations)
US2189387A
Cited
US2726278A
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US2743307A
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US2908736A
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US3019274A
Cited
US2933594A
Cited
US2922028A
Cited
US3086103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |