US2493353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizing signal separating circuit
Assignee: Hartford National Bank and Trust Co
•
Filing: 1947-02-08
•
Granted: 1950-01-03
•
Expires: 1967-02-08
Abstract
No abstract record available.
Inventors
- 👤 Kuperus Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:55
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/08; H04N5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2210523A
Cited
US2224134A
Cited
GB517181A
Cited
FR847675A
Cited
GB529790A
Cited
US2273546A
Cited
FR869945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |