US2540646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube modulation circuits for television receivers
Assignee: Scophony Ltd
•
Filing: 1949-03-16
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Granted: 1951-02-06
•
Expires: 1969-03-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard Geoffrey George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:08
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/148; H04N3/00; H04N3/10; H04N3/16; H04N3/20; H04N5/66; H04N5/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |