Patent US2668520A successfully refreshed from Google Patents.
US2668520A
Expired / Lapsed
US
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Fluid operated motor
Assignee: Individual
•
Filing: 1949-12-23
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Granted: 1954-02-09
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Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
- 👤 Frank C Best
- 👤 Edward V Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:27
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/12; E; E05; E05F; E05F11/00; E05F11/38; E05F11/382; E05F15/00; E05F15/50; E05F15/57; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/55
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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |