Patent US2576105A successfully refreshed from Google Patents.
US2576105A
Expired / Lapsed
US
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Balancing device for aircraft rotors
Assignee: Individual
•
Filing: 1945-09-06
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Granted: 1951-11-27
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Expires: 1965-09-06
Abstract
No abstract record available.
Inventors
- 👤 John C Childs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:19
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/18; F16F15/32; F16F15/322; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2154; Y10T74/2156; Y10T74/2157
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2238989A
Cited
US2076090A
Cited
US2336429A
Cited
US2339624A
Cited
US2361071A
Cited
US2362804A
Cited
US2441152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |