Patent US2599690A successfully refreshed from Google Patents.
US2599690A
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Helicopter control
Assignee: RTX Corp
•
Filing: 1945-06-16
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Granted: 1952-06-10
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Expires: 1965-06-16
Abstract
No abstract record available.
Inventors
- 👤 Michel D Buivid
- 👤 Alex Ralph Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; B64C27/58; B64C27/59; B64C27/605; B64C13/00; B64C13/02; B64C13/04; B64C13/042; B64C13/0421; B64C13/12; B64C13/24; B64C13/26; B64C13/28; B64C13/30; B64C27/04; B64C27/12; B64C27/14; B64C27/56
Claims Analysis
Total Claims: 0
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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) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |