US2492777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air heater with fuel-air mixture control
Assignee: Bendix Aviation Corp
•
Filing: 1943-08-23
•
Granted: 1949-12-27
•
Expires: 1963-08-23
Abstract
No abstract record available.
Inventors
- 👤 Emil O Wirth
- 👤 Barfod Frederik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:51
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |