Patent US2552075A successfully refreshed from Google Patents.
US2552075A
Expired / Lapsed
US
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Heating device for airplanes
Assignee: Individual
•
Filing: 1944-08-05
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Granted: 1951-05-08
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Expires: 1964-08-05
Abstract
No abstract record available.
Inventors
- 👤 Catherine Van Daam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:49
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1237592A
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US1795664A
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US1846468A
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US1949450A
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US2205543A
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GB525652A
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FR853799A
Cited
US2393635A
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US2402770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |