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US2862686A
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Hollow vane with internal vibration dampener
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1954-08-19
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Granted: 1958-12-02
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Expires: 1974-08-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:45
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/16; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2349187A
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US2405283A
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US2447628A
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US2462961A
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US2646920A
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US2689107A
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US2771240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |