US2810443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor head and swash plate means combination
Assignee: Doman Helicopters Inc
•
Filing: 1950-11-18
•
Granted: 1957-10-22
•
Expires: 1970-11-18
Abstract
No abstract record available.
Inventors
- 👤 Glidden S Doman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2163893A
Cited
US2264942A
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US2444070A
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US2428200A
Cited
US2410963A
Cited
FR948219A
Cited
US2648387A
Cited
US2537623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |