Patent US2052939A successfully refreshed from Google Patents.
Patent US2604953A successfully refreshed from Google Patents.
US2604953A
Expired / Lapsed
US
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Damping device for rotative wing aircraft
Assignee: Bridgestone Firestone Inc
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Filing: 1946-08-16
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Granted: 1952-07-29
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Expires: 1966-08-16
Abstract
No abstract record available.
Inventors
- 👤 Harris S Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:06
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1899096A
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US1948457A
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US2046889A
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US2554774A
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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) | 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 |