Patent US2678019A successfully refreshed from Google Patents.
US2678019A
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US
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Horizontal cycloidal blade propulsion assembly
Assignee: Individual
•
Filing: 1951-05-25
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Granted: 1954-05-11
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Expires: 1971-05-25
Abstract
No abstract record available.
Inventors
- 👤 Robert R Couch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:19
CPC Classifications
B; B63; B63H; B63H5/00; B63H5/02; B63H1/00; B63H1/02; B63H1/04; B63H1/06; B63H1/08; B63H1/10; B63H2005/025
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) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |