US2736887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air raid warning device
Assignee: Individual
•
Filing: 1952-06-10
•
Granted: 1956-02-28
•
Expires: 1972-06-10
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Hunsicker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:32
CPC Classifications
G; G08; G08B; G08B27/00; G08B27/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1158146A
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US1091038A
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US2029402A
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US2335382A
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US2458583A
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US2566121A
Cited
US2582790A
Cited
US2566597A
Cited
US2670466A
Cited
US2658192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |