US2539374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical synchronization pulse separation circuit
Assignee: General Precision Laboratory Inc
•
Filing: 1949-07-23
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Granted: 1951-01-23
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Expires: 1969-07-23
Abstract
No abstract record available.
Inventors
- 👤 Louis L Pourciau
- 👤 Richard W Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:50
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)
US2211942A
Cited
FR841045A
Cited
US2227630A
Cited
FR846887A
Cited
FR847675A
Cited
US2295346A
Cited
GB529790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |