US2820939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating system
Assignee: Bendix Aviation Corp
•
Filing: 1951-12-17
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Granted: 1958-01-21
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Expires: 1971-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry G Elwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:21
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/38; G01F1/383; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/909; Y10S388/923; Y10S388/934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1993527A
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US2445247A
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US2484089A
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US2590528A
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US2708258A
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US2593950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |