US2886313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover lifting device for an electric furnace
Assignee: Demag Elektrometallurgie GmbH
•
Filing: 1958-02-04
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Granted: 1959-05-12
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Wronka Bodo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:12
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/18; C; C21; C21B; C21B7/00; C21B7/18; C21C; C21C5/00; C21C5/52; C21C5/527; F27D3/00; F27D3/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18968
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1541290A
Cited
US1879881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |