US2705538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller with feathering blades
Assignee: Individual
•
Filing: 1950-05-04
•
Granted: 1955-04-05
•
Expires: 1970-05-04
Abstract
No abstract record available.
Inventors
- 👤 Russo Giovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:25
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B63; B63H; B63H1/00; B63H1/02; B63H1/04; B63H1/06; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H5/00; B63H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US649781A
Cited
FR369658A
Cited
FR427430A
Cited
US1349724A
Cited
GB148596A
Cited
US1900689A
Cited
US2032790A
Cited
FR862210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |