Patent US2763078A successfully refreshed from Google Patents.
Patent US2530276A successfully refreshed from Google Patents.
US2530276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for helicopters
Assignee: VINCENT MULVANEY
•
Filing: 1946-02-06
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Granted: 1950-11-14
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Expires: 1966-02-06
Abstract
No abstract record available.
Inventors
- 👤 Richard L Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:10
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1350312A
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US2216416A
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US2216163A
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US2317340A
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US2264943A
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US2350126A
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US2408489A
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US2394846A
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US2439089A
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US2435080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |