Patent US2720185A successfully refreshed from Google Patents.
US2720185A
Expired / Lapsed
US
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Pedal operated fluid drives for boat propellers
Assignee: Individual
•
Filing: 1952-10-29
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Granted: 1955-10-11
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Expires: 1972-10-29
Abstract
No abstract record available.
Inventors
- 👤 Charles E Sever
- 👤 John L Barger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:59
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/22; B63H23/26; B63H16/00; B63H16/08; B63H16/12; B63H16/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189614177A
Cited
US1473049A
Cited
US2310361A
Cited
US2600632A
Cited
US2486049A
Cited
US2494158A
Cited
US2556340A
Cited
US2634582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |