US2997274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbo-machine blade vibration damper
Assignee: Individual
•
Filing: 1953-04-13
•
Granted: 1961-08-22
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Morgan P Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:34
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB168997A
Cited
US1833754A
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US1856786A
Cited
US2349187A
Cited
US2618460A
Cited
GB670665A
Cited
US2651494A
Cited
US2783023A
Cited
US2669383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |