US2766736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc furnace, water cooled, roof door
Assignee: CELSO CIAMBERLINI
•
Filing: 1952-05-27
•
Granted: 1956-10-16
•
Expires: 1972-05-27
Abstract
No abstract record available.
Inventors
- 👤 Buono Vincenzo Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:01
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/18; F27D1/1808; F27D1/1816; F23; F23M; F23M7/00; F27B; F27B3/00; F27B3/10; F27B3/12; F27B3/16; F27B3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US387419A
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US1922312A
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US1992465A
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US2222004A
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US2512439A
Cited
US2551941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |