Patent US2563684A successfully refreshed from Google Patents.
US2563684A
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US
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Sound on sync separation system
Assignee: Pye Electronic Products Ltd
•
Filing: 1946-07-15
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Granted: 1951-08-07
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Expires: 1966-07-15
Abstract
No abstract record available.
Inventors
- 👤 Lord Arthur Valentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:20
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/084; H04N5/00; H04N5/04; H04N5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212199A
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US2227108A
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US2250708A
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US2266194A
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US2199634A
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US2268001A
Cited
GB564511A
Cited
US2391776A
Cited
US2428118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |