US2804916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil burner secondary air control system
Assignee: Iron Fireman Manufacturing Co
•
Filing: 1953-09-08
•
Granted: 1957-09-03
•
Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Runninger
- 👤 Ernest C Webb
- 👤 Richard C Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:48
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87281; Y10T137/8741; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |