Patent US2486574A successfully refreshed from Google Patents.
US2486574A
Expired / Lapsed
US
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Outboard propeller drive
Assignee: Individual
•
Filing: 1945-11-19
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Granted: 1949-11-01
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Expires: 1965-11-19
Abstract
No abstract record available.
Inventors
- 👤 Robert M Roof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:26
CPC Classifications
B; B63; B63H; B63H20/00; B63H20/28; B63H20/285; B63H20/02; B63H20/14; B63H20/32; B63H20/34; B63H2020/323; B63H2020/326; B63H23/00; B63H23/02; B63H2023/0208; B63H2023/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |