US2659424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus for furnaces
Assignee: NAT AIROIL BURNER Co Inc
•
Filing: 1950-08-22
•
Granted: 1953-11-17
•
Expires: 1970-08-22
Abstract
No abstract record available.
Inventors
- 👤 Ferguson William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:31
CPC Classifications
F; F23; F23C; F23C7/00; F23C1/00; F23C1/08; F23C5/00; F23D; F23D17/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1447337A
Cited
US1785583A
Cited
US1889993A
Cited
US1953275A
Cited
US2129589A
Cited
US2219363A
Cited
US2221469A
Cited
US2512319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |