US2755870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic booster control of helicopter blade pitch
Assignee: RTX Corp
•
Filing: 1950-09-26
•
Granted: 1956-07-24
•
Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Gerstenberger Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:19
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/12; B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22595E
Cited
GB524091A
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US2284298A
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US2395671A
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US2389274A
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US2405188A
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US2424901A
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US2437536A
Cited
US2479549A
Cited
US2443192A
Cited
US2521012A
Cited
US2590716A
Cited
US2605615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |