Patent US3403221A successfully refreshed from Google Patents.
US3403221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation record reproduce system for television signals
Assignee: US Philips Corp
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Filing: 1965-03-04
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Granted: 1968-09-24
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 Willem Van Den Bussche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:45
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/765; H04N5/775; H04N5/91; H04N5/92; H04N9/00; H04N9/79; H04N9/80; H04N9/802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3136866A
Cited
US3312782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |