US2495523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustaining rotor for aircraft
Assignee: Individual
•
Filing: 1945-01-20
•
Granted: 1950-01-24
•
Expires: 1965-01-20
Abstract
No abstract record available.
Inventors
- 👤 Russell R Hays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:31
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/41; B64C27/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2030578A
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US1979616A
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US2055928A
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GB449664A
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US2045355A
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US2086802A
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US2086803A
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US2221613A
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US2215609A
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US2256635A
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US2444070A
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US2369048A
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US2432677A
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US2369049A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |