Patent US2477679A successfully refreshed from Google Patents.
US2477679A
Expired / Lapsed
US
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Television and pulse modulated sound system
Assignee: STC PLC
•
Filing: 1946-04-24
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Granted: 1949-08-02
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Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Norman H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:12
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/084; H04N5/00; H04N5/04; H04N5/06; H04N5/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227108A
Cited
US2231971A
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US2402091A
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US2416306A
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US2391776A
Cited
US2428118A
Cited
US2401384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |