US2564554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Background control and synchronizing signal separating circuit
Assignee: RCA Corp
•
Filing: 1947-10-09
•
Granted: 1951-08-14
•
Expires: 1967-10-09
Abstract
No abstract record available.
Inventors
- 👤 Earl I Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:33
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/16; H04N5/165; H04N5/04; H04N5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB408656A
Cited
US2176663A
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AU1601234A
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US2137262A
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US2177723A
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US2255484A
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US2276565A
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US2433378A
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US2365575A
Cited
US2398596A
Cited
US2419548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |