Patent US2638499A successfully refreshed from Google Patents.
US2638499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television system
Assignee: RCA Corp
•
Filing: 1950-01-24
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Granted: 1953-05-12
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Expires: 1970-01-24
Abstract
No abstract record available.
Inventors
- 👤 Evans John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:36
CPC Classifications
H; H04; H04N; H04N11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2109540A
Cited
GB473061A
Cited
US2350892A
Cited
US2557794A
Cited
GB620032A
Cited
US2513520A
Cited
US2528510A
Cited
US2493200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |