US3072982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing sound and homogeneous ingots
Assignee: Westinghouse Electric Corp
•
Filing: 1953-07-13
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Granted: 1963-01-15
•
Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gordon
- 👤 Walter J Hurford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:00
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/005; C; C22; C22B; C22B4/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
IN THE PROCESS OF PREPARING A CLEAN, SOUND AND HIGHLY HOMOGENNEOUS INGOT OF A METAL FROM A FIRST ARC-CAST INGOT HAVING A THICK CONTAMINATED SURFACE AND LACKING HOMOGENEITY AND SOUNDNESS, THE STEP COMPRISING EMPLOYING THE SOLID ARC-CAST FIRST INGOT AS AN ELECTRODE AND ARC MELTING THE FIRST INGOT ALONE IN A COOLED MOLD, THE MOLD FORMING THE OTHER ELECTRODE, THE ARC-MELTING BEING CARRIED OUT UNDER VACUUM, WHEREBY SUCH ARC-MELTING DEPOSITE ONLY THE METAL FROM THE FIRST INGOT INTO SAID MOLD AND PRODUCES THEREIN A CLEAN SURFACE INGOT WHICH IS SOUND AND HIGHLY HOMOGENEOUS.
References Cited (Backward Citations)
US1555313A
Cited
GB358563A
Cited
US2541764A
Cited
US2640860A
Cited
US2676882A
Cited
US2686822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |