US2454512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft heater, including means to prevent fuel contamination of the ventilating air
Assignee: Stewart Warner Corp
•
Filing: 1945-08-17
•
Granted: 1948-11-23
•
Expires: 1965-08-17
Abstract
No abstract record available.
Inventors
- 👤 Seymour E Heymann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2089969A
Cited
US2136235A
Cited
US2270631A
Cited
US2263098A
Cited
US2386115A
Cited
US2382493A
Cited
US2374569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |