US2552727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of balancing rotor blades
Assignee: RTX Corp
•
Filing: 1945-08-28
•
Granted: 1951-05-15
•
Expires: 1965-08-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Lightfoot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:11
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/008; G; G01; G01M; G01M1/00; G01M1/30; G01M1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2388705A
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US2465007A
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US2451541A
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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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |