Patent US20050177167A1 successfully refreshed from Google Patents.
US2499228A
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Stabilization of directional devices
Assignee: NORDEN LAB CORP
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Filing: 1945-09-25
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Granted: 1950-02-28
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Expires: 1965-09-25
Abstract
No abstract record available.
Inventors
- 👤 Carl L Norden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:40
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/16; H01Q1/00; H01Q1/12; H01Q1/18; H01Q3/02; H01Q3/08; H01Q3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2158584A
Cited
US2199402A
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US2051974A
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US2207709A
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US2201174A
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US2288102A
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US2408825A
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US2410831A
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US2414108A
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US2419970A
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US2420016A
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US2420017A
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US2407275A
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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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |