US2851230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mach number responsive control for aircraft fuel system
Assignee: HM Hobson Ltd
•
Filing: 1954-01-05
•
Granted: 1958-09-09
•
Expires: 1974-01-05
Abstract
No abstract record available.
Inventors
- 👤 Greenland Leonard Sidney
- 👤 Stenning Kenneth Aubrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB575008A
Cited
US2497431A
Cited
US2642237A
Cited
US2599507A
Cited
US2638739A
Cited
US2677963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |