US2986703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase comparison circuit
Assignee: Telefunken AG
•
Filing: 1958-02-10
•
Granted: 1961-05-30
•
Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Pollak Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:43
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/12; H04N5/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2258877A
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US2483766A
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US2585803A
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US2572080A
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US2609501A
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US2484352A
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US2683802A
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US2725476A
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US2685033A
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US2776369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |