US2983148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in the dynamic balancing of rotors
Assignee: De Havilland Aircraft Co Ltd
•
Filing: 1955-08-15
•
Granted: 1961-05-09
•
Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 White John Maurice Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1695904A
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US1612329A
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US2043845A
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US2243458A
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US2381645A
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GB655151A
Cited
US2420765A
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US2622437A
Cited
US2521141A
Cited
DE843314C
Cited
DE867312C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |