Patent US2593432A successfully refreshed from Google Patents.
US2593432A
Expired / Lapsed
US
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Automatically operated radio buoy
Assignee: Individual
•
Filing: 1948-06-18
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Granted: 1952-04-22
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Expires: 1968-06-18
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Freas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:41
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)
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US2217188A
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US2361177A
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US2310017A
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US2551609A
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US2344425A
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US2402143A
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US2478866A
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US2497852A
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US2555867A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |