Patent US2685933A successfully refreshed from Google Patents.
US2685933A
Expired / Lapsed
US
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Variable pitch propeller
Assignee: Individual
•
Filing: 1952-01-28
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Granted: 1954-08-10
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Expires: 1972-01-28
Abstract
No abstract record available.
Inventors
- 👤 Terzi Paolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:33
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B63; B63H; B63H3/00; B63H3/008; B64C11/06; B63H2003/004
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |