US2684392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric furnace and smoke and fume take-off therefor
Assignee: Delaware Engineering Corp
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Filing: 1952-03-13
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Granted: 1954-07-20
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Expires: 1972-03-13
Abstract
No abstract record available.
Inventors
- 👤 William E Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:25
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/20; F23; F23J; F23J15/00; F27B; F27B3/00; F27B3/10; F27D17/30; F27D17/304; H; H05; H05B; H05B7/00; H05B7/18; H05B7/20; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10S; Y10S261/00; Y10S261/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |