US2761969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation detector
Assignee: Bendix Aviation Corp
•
Filing: 1951-03-19
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Granted: 1956-09-04
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Expires: 1971-03-19
Abstract
No abstract record available.
Inventors
- 👤 Donald W Blancher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:16
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; E21B47/13; H; H04; H04L; H04L27/00; H04L27/10; H04L27/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1897880A
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US2441963A
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US2352082A
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US2362503A
Cited
US2441957A
Cited
US2443619A
Cited
US2552110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |