US2473372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit type airplane heater
Assignee: Selas Corp of America
•
Filing: 1944-06-20
•
Granted: 1949-06-14
•
Expires: 1964-06-20
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
- 👤 Lawrence F Miller
- 👤 Jr Karl L Dietrich
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; Y02; Y02T; Y02T50/00; Y02T50/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2175812A
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US2270824A
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US2324010A
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US2314089A
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US2324540A
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US2336609A
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US2364458A
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US2410548A
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US2388970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |