Patent US2904217A successfully refreshed from Google Patents.
US2904217A
Expired / Lapsed
US
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Automatic life preserver
Assignee: Individual
•
Filing: 1955-08-23
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Granted: 1959-09-15
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Expires: 1975-08-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Gurney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:48
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/22; B63C9/23; B63C9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US547808A
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US572109A
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US1118420A
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US1117639A
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US1367225A
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US1290927A
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FR788421A
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FR978662A
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US2518750A
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US2627998A
Cited
US2684784A
Cited
US2801026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |