US2674304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft heater and combustion air control therefor
Assignee: Surface Combustion Corp
•
Filing: 1948-10-30
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Granted: 1954-04-06
•
Expires: 1968-10-30
Abstract
No abstract record available.
Inventors
- 👤 John I Trimble
- 👤 Jr William M Myler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:01
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/34; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/2012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2097255A
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US1562663A
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US1644496A
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US1777524A
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US2378781A
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US2451627A
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US2452779A
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US2466582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |