US2498871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase detection and tuner control system
Assignee: RCA Corp
•
Filing: 1945-02-09
•
Granted: 1950-02-28
•
Expires: 1965-02-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Beard
- 👤 Robert F Dressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:56
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2109222A
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US2041855A
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US2250532A
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US2266052A
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US2304377A
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US2340432A
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US2402210A
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US2423228A
Cited
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 |