US2343443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc furnace
Assignee: SWINDELL DRESSLER CORP
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Filing: 1941-08-19
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Granted: 1944-03-07
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Expires: 1961-08-19
Abstract
No abstract record available.
Inventors
- 👤 Frank W Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:50
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/14; C; C22; C22B; C22B4/00; C22B4/08; F; F27; F27D; F27D11/00; F27D11/08; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10S; Y10S403/00; Y10S403/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-03-07 | 1947-09-06 | 1948-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-03-07 | 1951-09-06 | 1952-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-03-07 | 1955-09-06 | 1956-03-07 | $7700.00 | Window Closed / Lapsed |