US2604951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic propeller pitch change mechanism
Assignee: Individual
•
Filing: 1945-08-13
•
Granted: 1952-07-29
•
Expires: 1965-08-13
Abstract
No abstract record available.
Inventors
- 👤 Elek K Benedek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:13
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20551E
Cited
US1723617A
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US1972486A
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US2086097A
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US2111657A
Cited
GB479888A
Cited
US2161917A
Cited
US2307849A
Cited
US2296348A
Cited
US2392364A
Cited
US2422966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |