US2552131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft speed governor means
Assignee: Power Jets Research and Development Ltd
•
Filing: 1946-03-28
•
Granted: 1951-05-08
•
Expires: 1966-03-28
Abstract
No abstract record available.
Inventors
- 👤 Adams Henry Frederic Trelawney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/50; B; B64; B64D; B64D31/00
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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |