US2831919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal filtering system for color television receiver
Assignee: RCA Corp
•
Filing: 1953-12-31
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Granted: 1958-04-22
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Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert K Lockhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:45
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/06; H04N11/12; H04N11/14; H04N11/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR706006A
Cited
US2238023A
Cited
US2304545A
Cited
US2583552A
Cited
US2523299A
Cited
US2605396A
Cited
US2605355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |