US2520728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube deflection sensitivity correction circuit
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1949-06-09
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Granted: 1950-08-29
•
Expires: 1969-06-09
Abstract
No abstract record available.
Inventors
- 👤 Melvin B Kline
- 👤 Peter S Christaldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2083203A
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US2089430A
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US2227484A
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US2170994A
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US2183634A
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US2405231A
Cited
US2422100A
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US2457175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |