Patent US2136621A successfully refreshed from Google Patents.
US2472774A
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US
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Irregular interlace scanning system
Assignee: Farnsworth Research Corp
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Filing: 1945-10-17
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Granted: 1949-06-07
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Expires: 1965-10-17
Abstract
No abstract record available.
Inventors
- 👤 Louis F Mayle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:35
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/169; H04N7/1696
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2280572A
Cited
FR819883A
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US2250479A
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US2203520A
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US2265216A
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US2251525A
Cited
US2224677A
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US2277192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |