US2568541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television signal mixing circuit
Assignee: RCA Corp
•
Filing: 1947-09-20
•
Granted: 1951-09-18
•
Expires: 1967-09-20
Abstract
No abstract record available.
Inventors
- 👤 Vernon J Duke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:12
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/06; H04N5/067; H04N5/0675
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1877825A
Cited
US2171536A
Cited
US2298796A
Cited
US2249942A
Cited
US2471903A
Cited
US2363809A
Cited
US2445040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |