US2987788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crucible assembly for electric arc furnace
Assignee: General Electric Co
•
Filing: 1958-03-06
•
Granted: 1961-06-13
•
Expires: 1978-03-06
Abstract
No abstract record available.
Inventors
- 👤 Richard E Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; F; F27; F27B; F27B14/00; F27B14/08; F27B14/10; F27D; F27D9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2356778A
Cited
GB558199A
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US2613411A
Cited
US2541764A
Cited
US2591858A
Cited
US2748433A
Cited
US2761002A
Cited
US2727936A
Cited
US2844644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |