Patent US4381918A successfully refreshed from Google Patents.
Patent US2677720A successfully refreshed from Google Patents.
US2677720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television system
Assignee: RCA Corp
•
Filing: 1949-09-23
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Granted: 1954-05-04
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Expires: 1969-09-23
Abstract
No abstract record available.
Inventors
- 👤 Alda V Bedford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:43
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/06; H04N11/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2048081A
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US2333969A
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US2272628A
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US2335180A
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US2359637A
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US2461515A
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US2539440A
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US2554693A
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US2580903A
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US2558489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |