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Patent US2429755A successfully refreshed from Google Patents.
US2429755A
Expired / Lapsed
US
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Video signal modulator
Assignee: Farnsworth Television and Radio Corp
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Filing: 1944-10-14
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Granted: 1947-10-28
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Expires: 1964-10-14
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Hallmark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:02
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/38; H04N5/40; H03; H03C; H03C1/00; H03C1/16; H03C1/18; H03C1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |