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US2331907A
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Furnace and associated feeding device
Assignee: Individual
•
Filing: 1938-07-27
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Granted: 1943-10-19
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Expires: 1958-07-27
Abstract
No abstract record available.
Inventors
- 👤 Harrington Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:08
CPC Classifications
F; F23; F23K; F23K3/00; H; H05; H05B; H05B3/00; F23K2203/00; F23K2203/004
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) | 1946-10-18 | 1947-04-19 | 1947-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-18 | 1951-04-19 | 1951-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-18 | 1955-04-19 | 1955-10-19 | $7700.00 | Window Closed / Lapsed |