Patent US2850896A successfully refreshed from Google Patents.
US2850896A
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Airstream direction detector
Assignee: Northrop Grumman Corp
•
Filing: 1954-11-29
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Granted: 1958-09-09
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Expires: 1974-11-29
Abstract
No abstract record available.
Inventors
- 👤 Legue David F Se
- 👤 Ziegler Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:26
CPC Classifications
B; B64; B64D; B64D43/00; B64D43/02; G; G01; G01P; G01P13/00; G01P13/02; G01P13/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1332810A
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US2524747A
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US2467179A
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US2579902A
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US2457751A
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US2603422A
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US2662402A
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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) | 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 |