US2519015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic air-speed and stall indicator
Assignee: General Electric Co
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Filing: 1948-11-23
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Granted: 1950-08-15
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Expires: 1968-11-23
Abstract
No abstract record available.
Inventors
- 👤 Igor B Bensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
B; B64; B64D; B64D43/00; B64D43/02; G; G01; G01P; G01P5/00; G01P5/24; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |