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US2628307A
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Emergency signaling apparatus
Assignee: EURA WILSON
•
Filing: 1950-06-01
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Granted: 1953-02-10
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Expires: 1970-06-01
Abstract
No abstract record available.
Inventors
- 👤 Jack M Lloyd
- 👤 Wiley M Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:14
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1755389A
Cited
US2328208A
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US2402143A
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US2470783A
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US2500809A
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US2519553A
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US2473050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |