US2468945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Altitude responsive control and signal device
Assignee: STEEL PRODUCTS ENG CO
•
Filing: 1944-07-21
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Granted: 1949-05-03
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Expires: 1964-07-21
Abstract
No abstract record available.
Inventors
- 👤 John D Sasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:31
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22272E
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US2211700A
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US2302072A
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US2355149A
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US2248878A
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US2315137A
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US2316009A
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US2316411A
Cited
US2358425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |