US2494209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor support
Assignee: RTX Corp
•
Filing: 1945-06-12
•
Granted: 1950-01-10
•
Expires: 1965-06-12
Abstract
No abstract record available.
Inventors
- 👤 Igor I Sikorsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:26
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US525338A
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US624352A
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US846927A
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US1298630A
Cited
GB311472A
Cited
US1879935A
Cited
GB476596A
Cited
FR818813A
Cited
US2352186A
Cited
US2382460A
Cited
US2410176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |