Patent US2494985A successfully refreshed from Google Patents.
US2494985A
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Aircraft rotor damping device
Assignee: Bridgestone Firestone Inc
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Filing: 1946-10-26
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Granted: 1950-01-17
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Expires: 1966-10-26
Abstract
No abstract record available.
Inventors
- 👤 Harris S Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:53
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/51; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/70; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR344777A
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US1123916A
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US1254400A
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US1631079A
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US1948458A
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US1899096A
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US1948457A
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US1949410A
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US2151280A
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US2114808A
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US2284717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |