US3059877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter anti-torque device
Assignee: RTX Corp
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Filing: 1961-08-11
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Granted: 1962-10-23
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 John G Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; B64C27/32; B64C2027/8245; B64C2027/8263; B64C2027/8272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |