US2745099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweep modulator direction finder
Assignee: Individual
•
Filing: 1951-05-10
•
Granted: 1956-05-08
•
Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Waldon P Bollinger
- 👤 Richard W Howery
- 👤 John R Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:57
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/32; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085409A
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US2074033A
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US2540839A
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US2420303A
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US2455673A
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US2426217A
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US2440261A
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US2476441A
Cited
US2541454A
Cited
US2587313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |