Patent US722957A successfully refreshed from Google Patents.
US722957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-feeding furnace-door.
Assignee: JAMES LAWSON LA PRELLE
•
Filing: 1902-05-14
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Granted: 1903-03-17
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Expires: 1922-05-14
Abstract
No abstract record available.
Inventors
- 👤 Charles Henry Eddins
- 👤 Clarence Buddie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:34
CPC Classifications
F; F23; F23H; F23H3/00; F23H3/02; F23N; F23N3/00; F23N3/02
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) | 1906-03-16 | 1906-09-15 | 1907-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-03-16 | 1910-09-15 | 1911-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-03-16 | 1914-09-15 | 1915-03-17 | $7700.00 | Window Closed / Lapsed |